x402 List

x402 Protocol Service Directory

●

SolSigs

Blockchain PAYMENT-READY

payment-ready until 2026-09-09

Real-time Solana data APIs plus ProofGuard receipts for AI agents: 22 specialist workers paid per call in USDC via x402 - DEX prices, arbitrage, wallet intelligence, launch detection, plus signed trust scores and payment/fulfillment receipts. No API keys, no subscriptions.

Pay from $0.001 to $0.35 per request in USDC on Solana, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-06-01 · no on-chain settlement recorded yet

BASE URL https://solsigs.com │ WEBSITE https://solsigs.com │ ENDPOINTS 22 │ NETWORK Solana │ ASSET USDC │ MEMBER SINCE 2026-06-01 │ MONITORED SINCE 2026-06-01

VERDICT

ranking generation 3

solid 89/100 #21 of 40 in Blockchain by measured score

What the score read on this service: status online, 100% uptime 30d, 168ms response p95, x402 compliance 13 of 13, $0.001 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 Blockchain, 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 40 listings, this one among them. That set is wider than the 40 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 BLOCKCHAIN

Other Blockchain 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
true402 strong 99 95.9% ---
FiatDock Marketplace strong 98 99.7% ---
3Route strong 98 100% ---
Loyal Spark strong 98 99.8% ---
OneSource strong 97 100% ---
5 of 39 other ranked services in Blockchain · see the whole category

ASSESSMENT

updated 6h 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
99.5%
response p95
168ms
avg response
164ms
total checks
2,780

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

compliance A (13/13)

13 of 13 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 to $0.35 (p20 in Blockchain)
price (min)
$0.001
price (max)
$0.35
category percentile (min)
p20 in Blockchain
category percentile (max)
p79 in Blockchain
endpoints / prices
22 / 9
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
-
registrar
-
hosting
custom
domain created
---

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers
volume 30d
$0.00
buyers 30d
0
settlements 30d
0
measured since
--- (start of our harvest window)
last settlement
---
top buyer share
-
trend 7d vs 30d
-
networks
solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$0
settlements all-time
0
median settlement 30d
-
max settlement 30d
-
settled via
-

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.

WHAT IT DOES

ai-derived

SolSigs provides Solana blockchain data APIs for AI agents, including token analysis, market data, and on-chain signals.

category
blockchain-data
in
body
auth
none
blockchainsolanatoken-analysismarket-dataon-chainai-agents

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
POST /alerts $0.005 Solana USDC header
POST /alpha $0.006 Solana USDC header
POST /arb Cross-DEX arbitrage scanner v2 with MEV scoring and sandwich detection — profitable trade opportunities with risk analysis $0.01 Solana USDC header
POST /dev $0.001 Solana USDC header
POST /dex Solana DEX price data — real-time prices, liquidity, and volume across Jupiter + Birdeye $0.002 Solana USDC header
POST /launches New token launch detection — spot fresh deployments and snipe opportunities on pump.fun and Raydium $0.003 Solana USDC header
POST /nft $0.004 Solana USDC header
POST /perps $0.005 Solana USDC header
POST /predict Polymarket prediction market data — odds, volume, liquidity across political, crypto, sports, and more $0.003 Solana USDC header
POST /price $0.003 Solana USDC header
POST /proofguard/evaluate SolSigs ProofGuard endpoint trust evaluation — route-level trust score, payment expectation receipt, fulfillment receipt, and refund evidence package for paid agent endpoints. 0.003 USDC. $0.003 Solana USDC header
POST /rpc Pay-per-call Solana RPC relay — shared Helius endpoint with built-in rate limiting $0.001 Solana USDC header
POST /smartmoney $0.008 Solana USDC header
POST /social $0.004 Solana USDC header
POST /staking $0.002 Solana USDC header
POST /summary AI-powered plain-English market summary — turn raw Solana data into readable insights $0.008 Solana USDC header
POST /token-safety $0.005 Solana USDC header
POST /token-verdict Rug-screen verdict for a Solana token. Composes mint/freeze authority, holder concentration, LP lock, wash-trading and smart-money signals into one GO / CAUTION / NO-GO score with reasons. Built to screen new launches and memecoins for rug risk — established tokens that intentionally keep mint/freeze authority (e.g. USDC, USDT) read NO-GO by design. 0.35 USDC. $0.35 Solana USDC header
POST /trending $0.004 Solana USDC header
POST /trust $0.003 Solana USDC header
POST /wallet Wallet risk scoring and transaction analysis — detect suspicious patterns, wash trading, and rug risks $0.005 Solana USDC header
POST /whale $0.006 Solana USDC header
22 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /arb 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://solsigs.com/arb'
// 402 response (captured by monitor) · 7 payloads · click to expand 
[
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "prediction",
            "polymarket",
            "markets"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "3000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/predict",
        "description": "Polymarket prediction market data — odds, volume, liquidity across political, crypto, sports, and more",
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/predict",
      "description": "Polymarket prediction market data — odds, volume, liquidity across political, crypto, sports, and more"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "ai",
            "analytics"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "8000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/summary",
        "description": "AI-powered plain-English market summary — turn raw Solana data into readable insights",
        "maxAmountRequired": "8000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/summary",
      "description": "AI-powered plain-English market summary — turn raw Solana data into readable insights"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "wallet",
            "risk"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "5000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/wallet",
        "description": "Wallet risk scoring and transaction analysis — detect suspicious patterns, wash trading, and rug risks",
        "maxAmountRequired": "5000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/wallet",
      "description": "Wallet risk scoring and transaction analysis — detect suspicious patterns, wash trading, and rug risks"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "defi",
            "dex"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "2000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/dex",
        "description": "Solana DEX price data — real-time prices, liquidity, and volume across Jupiter + Birdeye",
        "maxAmountRequired": "2000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/dex",
      "description": "Solana DEX price data — real-time prices, liquidity, and volume across Jupiter + Birdeye"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "defi",
            "arbitrage",
            "mev"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/arb",
        "description": "Cross-DEX arbitrage scanner v2 with MEV scoring and sandwich detection — profitable trade opportunities with risk analysis",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/arb",
      "description": "Cross-DEX arbitrage scanner v2 with MEV scoring and sandwich detection — profitable trade opportunities with risk analysis"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "tokens",
            "launches"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "3000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/launches",
        "description": "New token launch detection — spot fresh deployments and snipe opportunities on pump.fun and Raydium",
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/launches",
      "description": "New token launch detection — spot fresh deployments and snipe opportunities on pump.fun and Raydium"
    },
    "x402Version": 2
  },
  {
    "error": "PAYMENT-SIGNATURE header is required",
    "accepts": [
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USDC",
          "tags": [
            "solana",
            "rpc",
            "infrastructure"
          ],
          "decimals": 6,
          "serviceName": "SolSigs"
        },
        "payTo": "HZAkkKbhN9hfJBiNxCuwap7XtPXgniy9MVjJR2MvHSJi",
        "amount": "1000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "resource": "http://solsigs.com/rpc",
        "description": "Pay-per-call Solana RPC relay — shared Helius endpoint with built-in rate limiting",
        "maxAmountRequired": "1000",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://solsigs.com/rpc",
      "description": "Pay-per-call Solana RPC relay — shared Helius endpoint with built-in rate limiting"
    },
    "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/solsigs/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
08-04 · uptime 100.0% · 160ms avg08-05 · uptime 100.0% · 234ms avg08-06 · uptime 100.0% · 154ms avg08-07 · uptime 100.0% · 126ms avg08-08 · uptime 100.0% · 124ms avg08-09 · uptime 100.0% · 128ms avg08-10 · uptime 100.0% · 117ms avg08-11 · uptime 100.0% · 128ms avg08-12 · uptime 100.0% · 200ms avg08-13 · uptime 100.0% · 283ms avg08-14 · uptime 100.0% · 316ms avg08-15 · uptime 100.0% · 294ms avg08-16 · uptime 100.0% · 310ms avg08-17 · uptime 100.0% · 234ms avg08-18 · uptime 100.0% · 130ms avg08-19 · uptime 100.0% · 123ms avg08-20 · uptime 100.0% · 129ms avg08-21 · uptime 100.0% · 96ms avg08-22 · uptime 100.0% · 109ms avg08-23 · uptime 100.0% · 114ms avg08-24 · uptime 100.0% · 118ms avg08-25 · uptime 100.0% · 131ms avg08-26 · uptime 100.0% · 123ms avg08-27 · uptime 100.0% · 178ms avg08-28 · uptime 100.0% · 117ms avg08-29 · uptime 100.0% · 293ms avg08-30 · uptime 100.0% · 123ms avg08-31 · uptime 100.0% · 123ms avg09-01 · uptime 100.0% · 115ms avg09-02 · uptime 100.0% · 96ms avg08-0409-02
30d UPTIME 100%
RESPONSE TIME
08-04 · 160ms avg08-04 · 160ms avg08-05 · 234ms avg08-05 · 234ms avg08-06 · 154ms avg08-06 · 154ms avg08-07 · 126ms avg08-07 · 126ms avg08-08 · 124ms avg08-08 · 124ms avg08-09 · 128ms avg08-09 · 128ms avg08-10 · 117ms avg08-10 · 117ms avg08-11 · 128ms avg08-11 · 128ms avg08-12 · 200ms avg08-12 · 200ms avg08-13 · 283ms avg08-13 · 283ms avg08-14 · 316ms avg08-14 · 316ms avg08-15 · 294ms avg08-15 · 294ms avg08-16 · 310ms avg08-16 · 310ms avg08-17 · 234ms avg08-17 · 234ms avg08-18 · 130ms avg08-18 · 130ms avg08-19 · 123ms avg08-19 · 123ms avg08-20 · 129ms avg08-20 · 129ms avg08-21 · 96ms avg08-21 · 96ms avg08-22 · 109ms avg08-22 · 109ms avg08-23 · 114ms avg08-23 · 114ms avg08-24 · 118ms avg08-24 · 118ms avg08-25 · 131ms avg08-25 · 131ms avg08-26 · 123ms avg08-26 · 123ms avg08-27 · 178ms avg08-27 · 178ms avg08-28 · 117ms avg08-28 · 117ms avg08-29 · 293ms avg08-29 · 293ms avg08-30 · 123ms avg08-30 · 123ms avg08-31 · 123ms avg08-31 · 123ms avg09-01 · 115ms avg09-01 · 115ms avg09-02 · 96ms avg09-02 · 96ms avg08-0409-02
AVG RESP 165ms
PRICE (captured 402, USD)
08-03 · $0.00409-02 · $0.004$0.00408-0309-02

Median across 22 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-03 uptime: 100.0% compliance: 100% checks08-04 uptime: 100.0% compliance: 100% checks08-05 uptime: 100.0% compliance: 100% checks08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checks08-14 uptime: 100.0% compliance: 100% checks08-15 uptime: 100.0% compliance: 100% checks08-16 uptime: 100.0% compliance: 100% checks08-17 uptime: 100.0% compliance: 100% checks08-18 uptime: 100.0% compliance: 100% checks08-19 uptime: 100.0% compliance: 100% checks08-20 uptime: 100.0% compliance: 100% checks08-21 uptime: 100.0% compliance: 100% checks08-22 uptime: 100.0% compliance: 100% checks08-23 uptime: 100.0% compliance: 100% checks08-24 uptime: 100.0% compliance: 100% checks08-25 uptime: 100.0% compliance: 100% checks08-26 uptime: 100.0% compliance: 100% checks08-27 uptime: 100.0% compliance: 100% checks08-28 uptime: 100.0% compliance: 100% checks08-29 uptime: 100.0% compliance: 100% checks08-30 uptime: 100.0% compliance: 100% checks08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checksuptimecompliance08-0309-02

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 Blockchain
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)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

13/13 checks pass · grade A

last 402 captured 2026-06-16 · last up 2026-09-02

  • 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 105ms
● OK 163ms
● OK 102ms
● OK 88ms
● OK 131ms
● OK 80ms
● OK 71ms
● OK 81ms
● OK 107ms
● OK 85ms
● OK 74ms
● OK 83ms
● OK 84ms
● OK 119ms
● OK 94ms
● OK 82ms
● OK 97ms
● OK 96ms
18 of 2,712 checks · live count

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status
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[ update this listing ]

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