{"slug":"stall-row-production-up-railway-app-v1-sign-read-161fe9","title":"Sign Reader — read one x402 endpoint's 402 challenge","host":"stall-row-production.up.railway.app","method":"POST","resource":"https://stall-row-production.up.railway.app/v1/sign-read","category":"code","description":"Sign Reader — read one x402 endpoint's 402 challenge: both wire formats (v2 PAYMENT-REQUIRED header, v1 JSON body) parsed and normalized (network, asset, amount atomic and exact decimal, payTo, scheme), malformed fields named, declared-vs-live mismatches (method included) when you pass your catalogu","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":901,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"url":"https://example.com/v1/verdict"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"declared_amount":{"type":["string","null"]},"declared_method":{"type":["string","null"]},"declared_network":{"type":["string","null"]},"declared_pay_to":{"type":["string","null"]},"url":{"type":"string"}},"required":["url"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"accepts":{"items":{"type":"object"},"type":"array"},"challenge_found":{"type":"boolean"},"defects":{"items":{"type":"object"},"type":"array"},"http_status":{"type":["integer","null"]},"limits":{"type":"string"},"mismatches":{"items":{"type":"object"},"type":"array"},"origin":{"type":"string"},"read_at":{"type":"string"},"sdk_compat":{"type":["object","null"]},"url":{"type":"string"},"x402_version":{"type":["integer","null"]}},"required":["url","challenge_found","accepts"],"type":"object"},"schema":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-31","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":901,"error":null}],"description_full":"Sign Reader — read one x402 endpoint's 402 challenge: both wire formats (v2 PAYMENT-REQUIRED header, v1 JSON body) parsed and normalized (network, asset, amount atomic and exact decimal, payTo, scheme), malformed fields named, declared-vs-live mismatches (method included) when you pass your catalogue entry, and a compatibility verdict for the official Python and TypeScript x402 SDKs. Probe is unpaid. Use this when a checker's parser keeps choking on sellers' signs.","last_updated":"2026-10-30T18:34:52.369Z","schemes":["exact"]}