x402 List

x402 Protocol Service Directory

●

SolSigs

Blockchain PAYMENT-READY

payment-ready until 2026-08-20

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

ASSESSMENT

updated 4h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
99.4%
response p95
405ms
avg response
133ms
total checks
2,736

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 (p14 in Blockchain)
price (min)
$0.001
price (max)
$0.35
category percentile (min)
p14 in Blockchain
category percentile (max)
p90 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
first settlement
---
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
07-15 · uptime 100.0% · 121ms avg07-16 · uptime 100.0% · 128ms avg07-17 · uptime 100.0% · 131ms avg07-18 · uptime 100.0% · 87ms avg07-19 · uptime 100.0% · 82ms avg07-20 · uptime 100.0% · 87ms avg07-21 · uptime 100.0% · 121ms avg07-22 · uptime 100.0% · 134ms avg07-23 · uptime 100.0% · 128ms avg07-24 · uptime 100.0% · 100ms avg07-25 · uptime 100.0% · 129ms avg07-26 · uptime 100.0% · 136ms avg07-27 · uptime 100.0% · 169ms avg07-28 · uptime 100.0% · 119ms avg07-29 · uptime 100.0% · 91ms avg07-30 · uptime 100.0% · 116ms avg07-31 · uptime 100.0% · 158ms avg08-01 · uptime 100.0% · 123ms avg08-02 · uptime 100.0% · 144ms avg08-03 · uptime 100.0% · 128ms avg08-04 · 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% · 290ms avg07-1508-13
30d UPTIME 100%
RESPONSE TIME
07-15 · 121ms avg07-15 · 121ms avg07-16 · 128ms avg07-16 · 128ms avg07-17 · 131ms avg07-17 · 131ms avg07-18 · 87ms avg07-18 · 87ms avg07-19 · 82ms avg07-19 · 82ms avg07-20 · 87ms avg07-20 · 87ms avg07-21 · 121ms avg07-21 · 121ms avg07-22 · 134ms avg07-22 · 134ms avg07-23 · 128ms avg07-23 · 128ms avg07-24 · 100ms avg07-24 · 100ms avg07-25 · 129ms avg07-25 · 129ms avg07-26 · 136ms avg07-26 · 136ms avg07-27 · 169ms avg07-27 · 169ms avg07-28 · 119ms avg07-28 · 119ms avg07-29 · 91ms avg07-29 · 91ms avg07-30 · 116ms avg07-30 · 116ms avg07-31 · 158ms avg07-31 · 158ms avg08-01 · 123ms avg08-01 · 123ms avg08-02 · 144ms avg08-02 · 144ms avg08-03 · 128ms avg08-03 · 128ms avg08-04 · 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 · 290ms avg08-13 · 290ms avg07-1508-13
AVG RESP 134ms
PRICE (captured 402, USD)
07-14 · $0.00408-13 · $0.004$0.00407-1408-13

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

SUB-SCORES (uptime + x402 compliance)
07-15 uptime: 100.0% compliance: 92% checks07-16 uptime: 100.0% compliance: 92% checks07-17 uptime: 100.0% compliance: 100% checks07-18 uptime: 100.0% compliance: 100% checks07-19 uptime: 100.0% compliance: 100% checks07-20 uptime: 100.0% compliance: 100% checks07-21 uptime: 100.0% compliance: 100% checks07-22 uptime: 100.0% compliance: 100% checks07-23 uptime: 100.0% compliance: 100% checks07-24 uptime: 100.0% compliance: 100% checks07-25 uptime: 100.0% compliance: 100% checks07-26 uptime: 100.0% compliance: 100% checks07-27 uptime: 100.0% compliance: 100% checks07-28 uptime: 100.0% compliance: 100% checks07-29 uptime: 100.0% compliance: 100% checks07-30 uptime: 100.0% compliance: 100% checks07-31 uptime: 100.0% compliance: 100% checks08-01 uptime: 100.0% compliance: 100% checks08-02 uptime: 100.0% compliance: 100% checks08-03 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% checksuptimecompliance07-1508-13

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 2026-08-13

  • 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
● SLOW 301ms
● OK 72ms
● OK 189ms
● SLOW 275ms
● SLOW 370ms
● SLOW 468ms
● OK 112ms
● SLOW 416ms
● SLOW 279ms
● SLOW 349ms
● SLOW 305ms
● SLOW 445ms
● SLOW 422ms
● SLOW 255ms
● SLOW 348ms
● SLOW 274ms
● SLOW 364ms
● SLOW 308ms
18 of 2,750 checks · live count

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</a>
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</a>

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