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Marz Greta-Lock Network — AI Text Human-Likeness Benchmark

AI PAYMENT-READY

payment-ready until 2026-09-24

Scores how human AI-generated text sounds against 28 real personality profiles (EQ, formality, directness, hesitation, delay cadence). Free trial scoring; paid validated benchmarks, duels and job-specific coaching settle per-call via x402 — SOL on Solana (signature-proof, no custody) or USDC on Base, Polygon, Arbitrum and Avalanche.

Pay from $0.05 to $0.075 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-03 (start of our harvest window) · $0.61 all-time · settled via payAI

BASE URL https://eqbuilder.dev │ WEBSITE https://eqbuilder.dev │ ENDPOINTS 2 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-03 │ MONITORED SINCE 2026-08-03

VERDICT

ranking generation 3

solid 81/100 #83 of 128 in AI by measured score

What the score read on this service: status online, 100% uptime 30d, 1567ms response p95, x402 compliance 14 of 14, $0.05 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 AI, 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 128 listings, this one among them. That set is wider than the 128 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 AI

Other AI 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
Otto AI	strong	95	100%	$61.79
x402engine	solid	93	100%	$24.22
Agent402.tools	solid	92	98.9%	$142.69
GlianaAI	solid	92	100%	$89.52
StableEmail	solid	89	99.9%	$27.14

5 of 127 other ranked services in AI · see the whole category

ASSESSMENT

updated 2h 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: 1567ms
avg response: 981ms
total checks: 2,714

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 $0.05 to $0.075 (p73 in AI)

price (min): $0.05
price (max): $0.075
category percentile (min): p73 in AI
category percentile (max): p49 in AI
endpoints / prices: 2 / 2
model: tiered
stability: 85%

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: 43d
registrar: Name.com, Inc.
hosting: custom
domain created: 2026-08-03

Identity facts, not a risk score.

traction $0.35 30d · 2 buyers

volume 30d: $0.35
buyers 30d: 2
settlements 30d: 6
measured since: 2026-08-03 (start of our harvest window)
last settlement: 2026-09-14
top buyer share: 57% of 30d volume
trend 7d vs 30d: 2.45x the 30d daily rate
networks: eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $0.61
settlements all-time: 10
median settlement 30d: $0.05
max settlement 30d: $0.10
settled via: payAI ($0.35, 6 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

6 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 payout address changed 11d ago (6 in 30d)

payout address changed · 11d ago

payout removed EtMVNj6y7s2YmB6uTG3ats3gc4k8ePSg4BYwbrbr69DZ

price changed · 11d ago

POST /api/duel · eip155:8453 · USDC: 400000,75000 → 75000

schema changed · 11d ago

schema removed POST /api/duel exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"DEFAULT PAYMENT PATH. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"DEFAULT PAYMENT PATH. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp lamports UNKNOWN 2 application/json 120 https://eqbuilder.dev/api/simulate {"legacyNetwork":"solana","note":"LEGACY COMPATIBILITY PATH; Base USDC is the default. No facilitator, no custody: send >= maxAmountRequired lamports from your wallet to payTo, wait for finalized commitment, then retry with header X-PAYMENT = base64(JSON) of {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"solana\",\"payload\":{\"signature\":\"<tx signature>\",\"payer\":\"<your wallet address>\"}}. The platform verifies the transfer read-only on-chain; each signature is accepted exactly once.","settlement":"signature-proof"}

schema added POST /api/duel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 120 {"chainId":8453,"name":"USD Coin","version":"2"}

schema added POST /api/simulate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 120 {"chainId":8453,"name":"USD Coin","version":"2"}

payout address changed · 11d ago

payout added EtMVNj6y7s2YmB6uTG3ats3gc4k8ePSg4BYwbrbr69DZ

price changed · 11d ago

POST /api/duel · eip155:8453 · USDC: 75000 → 400000,75000

schema changed · 11d ago

schema removed POST /api/duel exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/duel exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp lamports UNKNOWN 2 application/json 120 https://eqbuilder.dev/api/duel {"legacyNetwork":"solana","note":"No facilitator, no custody: send >= maxAmountRequired lamports from your wallet to payTo, wait for finalized commitment, then retry with header X-PAYMENT = base64(JSON) of {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"solana\",\"payload\":{\"signature\":\"<tx signature>\",\"payer\":\"<your wallet address>\"}}. The platform verifies the transfer read-only on-chain; each signature is accepted exactly once.","settlement":"signature-proof"}

schema removed POST /api/simulate exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"Standard x402 EVM flow, no on-chain tx on your side: sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. Then retry with header X-PAYMENT = standard base64 of the compact JSON {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"<this entry's network>\",\"payload\":{\"signature\":\"<0x 65-byte EIP-712 signature>\",\"authorization\":{<the six fields above>}}}. The platform verifies and settles via a public facilitator; the nonce is single-use, so a retried authorization is idempotent and never double-charged. No account or API key needed.","settlement":"facilitator","version":"2"}

schema removed POST /api/simulate exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp lamports UNKNOWN 2 application/json 120 https://eqbuilder.dev/api/simulate {"legacyNetwork":"solana","note":"No facilitator, no custody: send >= maxAmountRequired lamports from your wallet to payTo, wait for finalized commitment, then retry with header X-PAYMENT = base64(JSON) of {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"solana\",\"payload\":{\"signature\":\"<tx signature>\",\"payer\":\"<your wallet address>\"}}. The platform verifies the transfer read-only on-chain; each signature is accepted exactly once.","settlement":"signature-proof"}

schema added POST /api/duel exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/duel exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/duel exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/duel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/duel {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"DEFAULT PAYMENT PATH. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/simulate exact eip155:137 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":137,"legacyNetwork":"polygon","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 137, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/simulate exact eip155:42161 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 USD Coin 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":42161,"legacyNetwork":"arbitrum","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 42161, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/simulate exact eip155:43114 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":43114,"legacyNetwork":"avalanche","name":"USD Coin","note":"Supported alternative; Base USDC is the default payment path. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 43114, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/simulate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 application/json 120 https://eqbuilder.dev/api/simulate {"chainId":8453,"legacyNetwork":"base","name":"USD Coin","note":"DEFAULT PAYMENT PATH. Sign an EIP-3009 TransferWithAuthorization as EIP-712 typed data (domain: name/version from this entry's extra, chainId 8453, verifyingContract = this entry's asset, i.e. the USDC contract) with from=<your 0x address>, to=payTo, value=maxAmountRequired (atomic USDC units, 6 decimals, base-10 string), validAfter=0, validBefore=<unix seconds a few minutes ahead>, nonce=<fresh random 32 bytes as 0x hex>. No ETH is needed. Build the canonical x402 v2 payment from this full 402 response: {\"x402Version\":2,\"resource\":<top-level resource>,\"accepted\":<this accepts entry>,\"payload\":{\"signature\":\"<0x 65-byte signature>\",\"authorization\":{<the six fields above>}},\"extensions\":<top-level extensions if present>}. Base64-encode the compact JSON and retry once with PAYMENT-SIGNATURE. Read the result and PAYMENT-RESPONSE. If the paid request times out, preserve the error and any receipt; confirm payment status before creating or replaying an authorization. Existing X-PAYMENT clients remain compatible.","settlement":"facilitator","version":"2"}

schema added POST /api/simulate exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp lamports UNKNOWN 2 application/json 120 https://eqbuilder.dev/api/simulate {"legacyNetwork":"solana","note":"LEGACY COMPATIBILITY PATH; Base USDC is the default. No facilitator, no custody: send >= maxAmountRequired lamports from your wallet to payTo, wait for finalized commitment, then retry with header X-PAYMENT = base64(JSON) of {\"x402Version\":2,\"scheme\":\"exact\",\"network\":\"solana\",\"payload\":{\"signature\":\"<tx signature>\",\"payer\":\"<your wallet address>\"}}. The platform verifies the transfer read-only on-chain; each signature is accepted exactly once.","settlement":"signature-proof"}

Amounts are on-wire atomic units in the named asset.

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/duel	Per-bot EQ duel entry fee. Two bots answer the same prompt against the same profile; higher EQ score wins. Fee escalates with your consecutive failures and includes your loyalty discount.	$0.075	Base	USDC	header
POST	/api/simulate	Validated human-likeness benchmark session. Fee escalates with consecutive failures and resets on a pass; preview your exact fee at https://eqbuilder.dev/api/fee/simulate/{wallet_address}.	$0.05	Base	USDC	header

2 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request

curl -i -X POST 'https://eqbuilder.dev/api/duel'

// 402 response (captured by monitor) · 2 payloads · click to expand

[
  {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2"
        },
        "payTo": "0xa6c1c305D7e11AE7Eeb80dDB179E8A51a0A2E32a",
        "amount": "75000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://eqbuilder.dev/api/duel",
      "mimeType": "application/json",
      "description": "Per-bot EQ duel entry fee. Two bots answer the same prompt against the same profile; higher EQ score wins. Fee escalates with your consecutive failures and includes your loyalty discount. Paid in USDC on Base.",
      "serviceName": "Marz Greta-Lock Network"
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2"
        },
        "payTo": "0xa6c1c305D7e11AE7Eeb80dDB179E8A51a0A2E32a",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://eqbuilder.dev/api/simulate",
      "mimeType": "application/json",
      "description": "Unlocks one validated EQ benchmark session: your text scored against 28 real human personality profiles with a pass/fail verdict, per-dimension gap metrics, public leaderboard entry, and a shareable certificate — about $0.05 for this call, no account or API key. Default payment path: select the Base USDC accepts[] requirement, sign its EIP-3009 authorization, and retry once with PAYMENT-SIGNATURE. Fee escalates with consecutive failures and resets on a pass; preview your exact fee at https://eqbuilder.dev/api/fee/simulate/{wallet_address}. Paid in USDC on Base.",
      "serviceName": "Marz Greta-Lock Network"
    },
    "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/marz-greta-lock-network-ai-text-human-likeness-benchmark/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

30d UPTIME 100%

RESPONSE TIME

AVG RESP 982ms

PRICE (captured 402, USD)

Median across 2 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

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 AI

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)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-06 · last up 2026-09-17

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

11:03:09 UTC ● OK 529ms

10:47:12 UTC ● OK 744ms

10:31:14 UTC ● OK 992ms

10:15:15 UTC ● SLOW 2380ms

09:59:10 UTC ● OK 834ms

09:43:06 UTC ● OK 521ms

09:27:05 UTC ● OK 506ms

09:11:08 UTC ● OK 1168ms

08:55:11 UTC ● SLOW 2286ms

08:39:11 UTC ● SLOW 2052ms

08:23:07 UTC ● OK 1295ms

08:07:05 UTC ● OK 1060ms

07:51:05 UTC ● OK 1099ms

07:35:12 UTC ● OK 1096ms

07:19:11 UTC ● SLOW 1511ms

07:03:09 UTC ● SLOW 1582ms

06:47:12 UTC ● OK 952ms

06:31:13 UTC ● SLOW 2818ms

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status

Marz Greta-Lock Network — AI Text Human-Likeness Benchmark uptime on x402-list — live uptime

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// HTML · live uptime variant

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[ update this listing ]

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