x402 List

x402 Protocol Service Directory

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KHOTEM — Cryptographic Witness

Verification ✓ VERIFIED

delivery-verified 2026-09-01 · no expiry, revoked only on payTo or schema drift

KHOTEM is a cryptographic witness for AI agents: seal (SHA-256 commitments), attest, verify, timestamp and audit, plus three paid operational-law documents for agent builders. x402 v2 with EIP-712-ready accepts on Base, Polygon and Solana. Direct on-chain USDC verification — no facilitator, no accounts, no API keys. Pay per request, present the settlement txHash in X-PAYMENT. Machine-readable via OpenAPI, Bazaar discovery extension, skill.md, AGENTS.md and llms.txt.

Pay from $0.02 to $0.25 per request in USDC on Base / Polygon / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-30 (start of our harvest window) · $1.94 all-time · settled via payAI

paid probe: delivered (HTTP 200) on 2026-09-01

BASE URL https://khotem.com │ WEBSITE https://khotem.com │ ENDPOINTS 8 │ NETWORK Base / Polygon / Solana │ ASSET USDC │ MEMBER SINCE 2026-08-26 │ MONITORED SINCE 2026-08-26

VERDICT

ranking generation 3

solid 85/100 #21 of 77 in Verification by measured score

What the score read on this service: status online, 100% uptime 30d, 363ms response p95, x402 compliance 14 of 14, $0.02 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Verification, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 77 listings, this one among them. That set is wider than the 77 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN VERIFICATION

Other Verification services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
Rubric Protocol — Post-Quantum AI Attestation solid 93 100% $10.15
LION — Verified Company & Compliance Data solid 89 100% $7.06
767-2676.com - POPCORN solid 88 100% $0.03
Council of AI GSPC solid 88 100% $0
10x402 solid 88 100% $2.50
5 of 76 other ranked services in Verification

ASSESSMENT

updated 4h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
363ms
avg response
279ms
total checks
1,452

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.02 to $0.25 (p65 in Verification)
price (min)
$0.02
price (max)
$0.25
category percentile (min)
p65 in Verification
category percentile (max)
p64 in Verification
endpoints / prices
8 / 5
model
tiered
stability
100%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
20d
registrar
Registrar of Domain Names REG.RU LLC
hosting
custom
domain created
2026-08-20

Identity facts, not a risk score.

traction $1.94 30d · 3 buyers
volume 30d
$1.94
buyers 30d
3
settlements 30d
42
measured since
2026-08-30 (start of our harvest window)
last settlement
2026-09-11
top buyer share
83% of 30d volume
trend 7d vs 30d
2.36x the 30d daily rate
networks
eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$1.94
settlements all-time
42
median settlement 30d
$0.02
max settlement 30d
$0.50
settled via
payAI ($1.94, 42 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

CHANGES

7 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 10d ago (7 in 30d)

schema changed · 10d ago

schema removed GET /api/doc/15 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/doc/15 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/doc/15 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/doc/16 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/doc/16 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/doc/16 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/doc/17 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/doc/17 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/doc/17 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed POST /api/attest exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed POST /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed POST /api/attest exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed POST /api/audit exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed POST /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed POST /api/audit exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed POST /api/seal exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed POST /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed POST /api/seal exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed POST /api/thread exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed POST /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed POST /api/thread exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed POST /api/verify exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed POST /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed POST /api/verify exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/doc/15 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/15 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added GET /api/doc/15 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/16 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/16 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added GET /api/doc/16 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/17 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/17 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added GET /api/doc/17 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/attest exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added POST /api/attest exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/audit exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added POST /api/audit exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/seal exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added POST /api/seal exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/thread exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added POST /api/thread exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/verify exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 (PoS) Dai Stablecoin 2 60 {"name":"(PoS) Dai Stablecoin","version":"2"}

schema added POST /api/verify exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"name":"USD Coin","version":"2"}

schema changed · 11d ago

endpoint removed GET /api/attest

endpoint removed GET /api/audit

endpoint removed GET /api/seal

endpoint removed GET /api/thread

endpoint removed GET /api/verify

endpoint added POST /api/attest

endpoint added POST /api/audit

endpoint added POST /api/seal

endpoint added POST /api/thread

endpoint added POST /api/verify

schema removed GET /api/attest exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/attest exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/attest exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema removed GET /api/attest exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/audit exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/audit exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/audit exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema removed GET /api/audit exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/seal exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/seal exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/seal exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema removed GET /api/seal exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/thread exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/thread exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/thread exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema removed GET /api/thread exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema removed GET /api/verify exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema removed GET /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/verify exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema removed GET /api/verify exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema removed GET /api/verify exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added POST /api/attest exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added POST /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/attest exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/attest exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/attest exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added POST /api/audit exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added POST /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/audit exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/audit exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/audit exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added POST /api/seal exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added POST /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/seal exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/seal exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/seal exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added POST /api/thread exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added POST /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/thread exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/thread exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/thread exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added POST /api/verify exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added POST /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/verify exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added POST /api/verify exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added POST /api/verify exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema changed · 12d ago

schema removed GET /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/attest exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/audit exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/doc/15 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/doc/15 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/doc/16 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/doc/16 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/doc/17 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/doc/17 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/seal exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/thread exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema removed GET /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema removed GET /api/verify exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/attest exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/audit exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/15 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/15 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/16 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/16 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/17 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/doc/17 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/seal exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/thread exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema added GET /api/verify exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb Dai Stablecoin 2 60 {"name":"Dai Stablecoin","version":"2"}

schema changed · 13d ago

schema removed GET /api/attest exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/audit exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/doc/15 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/doc/16 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/doc/17 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/seal exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/thread exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema removed GET /api/verify exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/attest exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/audit exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/15 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/16 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/doc/17 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/seal exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/thread exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema added GET /api/verify exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60 {"name":"USD Coin","version":"2"}

schema changed · 15d ago

schema added GET /api/attest exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/attest exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/audit exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/audit exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/doc/15 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/doc/15 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/doc/16 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/doc/16 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/doc/17 exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/doc/17 exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/seal exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/seal exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/thread exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/thread exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

schema added GET /api/verify exact eip155:137 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063 UNKNOWN 2 60

schema added GET /api/verify exact eip155:8453 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb UNKNOWN 2 60

payout address changed · 15d ago

payout removed 0x7f334804cE89Aa874a95654d8EeF6D4d0916bFb6

payout added 0xE61c2359F1539b15F092AADbAC332cf033767aec

schema changed · 15d ago

schema removed GET /api/attest exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/audit exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/doc/15 exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/doc/16 exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/doc/17 exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/seal exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/thread exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema removed GET /api/verify exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 60

schema added GET /api/attest exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/attest exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/attest exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/audit exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/audit exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/audit exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/doc/15 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/doc/15 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/doc/15 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/doc/16 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/doc/16 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/doc/16 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/doc/17 exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/doc/17 exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/doc/17 exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/seal exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/seal exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/seal exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/thread exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/thread exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/thread exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

schema added GET /api/verify exact eip155:137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 USDC 2 60

schema added GET /api/verify exact eip155:8453 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 USDC 2 60

schema added GET /api/verify exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
POST /api/attest $0.02 Base/Polygon/Solana USDC header
POST /api/audit $0.15 Base/Polygon/Solana USDC header
GET /api/doc/15 $0.10 Base/Polygon/Solana USDC header
GET /api/doc/16 $0.10 Base/Polygon/Solana USDC header
GET /api/doc/17 $0.10 Base/Polygon/Solana USDC header
POST /api/seal $0.05 Base/Polygon/Solana USDC header
POST /api/thread $0.25 Base/Polygon/Solana USDC header
POST /api/verify $0.05 Base/Polygon/Solana USDC header
8 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/doc/15 returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://khotem.com/api/doc/15'
// 402 response (captured by monitor) · 8 payloads · click to expand 
[
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/doc/17",
      "mimeType": "application/json",
      "description": "DOC 17: sealed operating-law document (Russian). GET after payment — markdown + sha16."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "doc": "17",
              "sha16": "a1b2c3d4e5f60708",
              "content": "<document 17, markdown>",
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {},
                  "description": "No input — GET returns the document after payment.",
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "250000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "250000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "250000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "250000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "250000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/thread",
      "mimeType": "application/json",
      "description": "THREAD: full sealed document thread (Russian). GET after payment — all documents with per-file sha16."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "mode": "DIRECT",
              "thread": {
                "15": {
                  "file": "DOC15.md",
                  "sha16": "a1b2c3d4e5f60708",
                  "content": "<markdown>"
                }
              },
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {},
                  "description": "No input — GET returns the full document thread after payment.",
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "150000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "150000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "150000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "150000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "150000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/audit",
      "mimeType": "application/json",
      "description": "AUDIT: batch audit of an array of sessions. POST body: array. Returns per-item results + overall verdict."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": 3,
              "total": 5,
              "results": [
                {
                  "ok": true,
                  "root": "9f2c…"
                },
                {
                  "ok": false,
                  "reason": "root_mismatch"
                }
              ],
              "verdict": "✗ TAMPERED",
              "payment_seal": "a1b2c3d4e5f60708",
              "verdict_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "seal"
                    ],
                    "properties": {
                      "seal": {
                        "type": "object",
                        "required": [
                          "root"
                        ],
                        "properties": {
                          "root": {
                            "type": "string",
                            "description": "merkle root hex"
                          }
                        }
                      }
                    },
                    "description": "Session object. All fields except \"seal\" and \"_\"-prefixed are hashed into leaves; seal.root must equal the merkle root."
                  },
                  "description": "Array of session objects, same shape as /api/verify"
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "50000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/seal",
      "mimeType": "application/json",
      "description": "SEAL: witnessed cryptographic stamp + timestamp. POST body: {\"content\":\"...\"} (hashed and forgotten) or {\"hash\":\"<sha256 hex>\"} — content never leaves your machine. Returns seal_stamp + payment_seal."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "hash": "Pre-computed sha256 hex (64 chars)",
              "content": "Content to hash and seal"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "note": "content not stored: hashed and forgotten",
              "proof": "recorded in the KHOTEM ledger; verifiable via /api/attest",
              "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
              "witness": "KHOTEM-SEAL",
              "timestamp": "2026-08-24T12:00:00.000Z",
              "seal_stamp": "a1b2c3d4e5f60708",
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "properties": {
                    "hash": {
                      "type": "string",
                      "description": "Pre-computed sha256 hex (64 chars)"
                    },
                    "content": {
                      "type": "string",
                      "description": "Content to hash and seal"
                    }
                  },
                  "description": "Provide either content (server hashes and forgets it) or hash (client-side sha256, content never sent)."
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "20000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "20000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "20000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/attest",
      "mimeType": "application/json",
      "description": "ATTEST: certificate of existence. POST body: {\"ref\":\"0x<txHash>\" | \"<sha256 hex>\" | \"<16-hex stamp>\"} — exact match against the ledger. Returns CONFIRMED + entry, or honest NOT_FOUND."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "ref": "txHash (0x+64 hex) / sha256 (64 hex) / stamp (16 hex) — exac"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "entry": {
                "ts": "2026-08-24T12:00:00.000Z",
                "event": "seal",
                "sha256": "e3b0c4…"
              },
              "attest": "CONFIRMED",
              "attest_seal": "a1b2c3d4e5f60708",
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "ref"
                  ],
                  "properties": {
                    "ref": {
                      "type": "string",
                      "description": "txHash (0x+64 hex) / sha256 (64 hex) / stamp (16 hex) — exact match"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "50000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "50000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/verify",
      "mimeType": "application/json",
      "description": "VERIFY: session integrity check (merkle+CID). POST body: session object(s) with seal.root. Returns verdict ALL VERIFIED / TAMPERED with reason."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "seal": {
                "root": "merkle root hex"
              }
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": 1,
              "total": 1,
              "results": [
                {
                  "ok": true,
                  "root": "9f2c…"
                }
              ],
              "verdict": "✓ ALL VERIFIED",
              "payment_seal": "a1b2c3d4e5f60708",
              "verdict_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "seal"
                  ],
                  "properties": {
                    "seal": {
                      "type": "object",
                      "required": [
                        "root"
                      ],
                      "properties": {
                        "root": {
                          "type": "string",
                          "description": "merkle root hex"
                        }
                      }
                    }
                  },
                  "description": "Session object. All fields except \"seal\" and \"_\"-prefixed are hashed into leaves; seal.root must equal the merkle root."
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/doc/16",
      "mimeType": "application/json",
      "description": "DOC 16: sealed operating-law document (Russian). GET after payment — markdown + sha16."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "doc": "16",
              "sha16": "a1b2c3d4e5f60708",
              "content": "<document 16, markdown>",
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {},
                  "description": "No input — GET returns the document after payment.",
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "name": "Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x3c499c542cef5e3811e1192ce70d8cc03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
        "extra": {
          "name": "(PoS) Dai Stablecoin",
          "version": "2"
        },
        "payTo": "0xE61c2359F1539b15F092AADbAC332cf033767aec",
        "amount": "100000000000000000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "AMYmNkTwwbfV5xAQzhAAmktWDCfJpg1UXn2yX2jHJB8Z",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://khotem.com/api/doc/15",
      "mimeType": "application/json",
      "description": "DOC 15: sealed operating-law document (Russian). GET after payment — markdown + sha16."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "doc": "15",
              "sha16": "a1b2c3d4e5f60708",
              "content": "<document 15, markdown>",
              "payment_seal": "1020304050607080"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {},
                  "description": "No input — GET returns the document after payment.",
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "khotemSeal": {
        "info": {
          "verify": "POST /api/attest {\"ref\": \"<payment_seal or sha256>\"}",
          "description": "Every paid answer carries a KHOTEM seal (payment_seal): a ledger-anchored, independently verifiable stamp of this exact call. Verify any stamp via POST /api/attest ($0.02) or free precheck POST /api/attest/check.",
          "free_precheck": "POST /api/attest/check {\"ref\": \"…\"}"
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/khotem-cryptographic-witness/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
08-26 · uptime 100.0% · 288ms avg08-27 · uptime 100.0% · 274ms avg08-28 · uptime 100.0% · 295ms avg08-29 · uptime 100.0% · 314ms avg08-30 · uptime 100.0% · 212ms avg08-31 · uptime 100.0% · 255ms avg09-01 · uptime 100.0% · 278ms avg09-02 · uptime 100.0% · 375ms avg09-03 · uptime 100.0% · 309ms avg09-04 · uptime 100.0% · 262ms avg09-05 · uptime 100.0% · 319ms avg09-06 · uptime 100.0% · 292ms avg09-07 · uptime 100.0% · 256ms avg09-08 · uptime 100.0% · 285ms avg09-09 · uptime 100.0% · 254ms avg09-10 · uptime 100.0% · 244ms avg09-11 · uptime 100.0% · 219ms avg08-2609-11
30d UPTIME 100%
RESPONSE TIME
08-26 · 288ms avg08-26 · 288ms avg08-27 · 274ms avg08-27 · 274ms avg08-28 · 295ms avg08-28 · 295ms avg08-29 · 314ms avg08-29 · 314ms avg08-30 · 212ms avg08-30 · 212ms avg08-31 · 255ms avg08-31 · 255ms avg09-01 · 278ms avg09-01 · 278ms avg09-02 · 375ms avg09-02 · 375ms avg09-03 · 309ms avg09-03 · 309ms avg09-04 · 262ms avg09-04 · 262ms avg09-05 · 319ms avg09-05 · 319ms avg09-06 · 292ms avg09-06 · 292ms avg09-07 · 256ms avg09-07 · 256ms avg09-08 · 285ms avg09-08 · 285ms avg09-09 · 254ms avg09-09 · 254ms avg09-10 · 244ms avg09-10 · 244ms avg09-11 · 219ms avg09-11 · 219ms avg08-2609-11
AVG RESP 279ms
PRICE (captured 402, USD)
08-27 · $0.1008-30 · $0.1008-31 · $0.1009-01 · $0.1009-11 · $0.10$0.1008-2709-11

Median across 8 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-26 uptime: 100.0% compliance: 93% checks08-27 uptime: 100.0% compliance: 93% checks08-28 uptime: 100.0% compliance: 93% checks08-29 uptime: 100.0% compliance: 93% checks08-30 uptime: 100.0% compliance: 93% checks08-31 uptime: 100.0% compliance: 93% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checks09-03 uptime: 100.0% compliance: 100% checks09-04 uptime: 100.0% compliance: 100% checks09-05 uptime: 100.0% compliance: 100% checks09-06 uptime: 100.0% compliance: 100% checks09-07 uptime: 100.0% compliance: 100% checks09-08 uptime: 100.0% compliance: 100% checks09-09 uptime: 100.0% compliance: 100% checks09-10 uptime: 100.0% compliance: 100% checks09-11 uptime: 100.0% compliance: 100% checksuptimecompliance08-2609-11

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)
price percentile in Verification
site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
08-30 · $0.2308-31 · $0.5209-01 · $0.1209-10 · $109-11 · $0.05peak $108-3009-11
DISTINCT BUYERS
08-30 · 1 buyer08-31 · 1 buyer09-01 · 2 buyers09-10 · 1 buyer09-11 · 1 buyerpeak 2 buyers08-3009-11

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-01 · last up 2026-09-11

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 202ms
● OK 274ms
● OK 184ms
● OK 206ms
● OK 267ms
● OK 208ms
● OK 181ms
● OK 275ms
● OK 259ms
● OK 209ms
● OK 334ms
● OK 236ms
● OK 219ms
● OK 250ms
● OK 192ms
● OK 198ms
● OK 287ms
● OK 213ms
18 of 1,466 checks · live count

EMBED THIS BADGE

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KHOTEM — Cryptographic Witness uptime on x402-list
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  <img src="https://x402-list.com/badge/khotem-cryptographic-witness.svg" alt="KHOTEM — Cryptographic Witness listed on x402-list" height="28">
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</a>

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