{"slug":"horizonpulse-dev-api-x402-check-795365","title":"Audit any public x402 endpoint","host":"horizonpulse.dev","method":"GET","resource":"https://horizonpulse.dev/api/x402-check","category":"code","description":"Audit any public x402 endpoint: one unpaid probe → 402 validity, x402 version, decoded price/network/asset, payTo type (EOA vs contract), discovery-metadata hints, pass/warn/fail checks; SSRF-safe; never pays","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":249,"reported_calls_30d":2,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"method":"GET","url":"https://horizonpulse.dev/api/pulse"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"properties":{"body":{"description":"Optional JSON body (<=8KB, URL-encoded) sent with a POST probe, for endpoints that validate input before returning 402. Implies POST.","type":"string"},"method":{"description":"HTTP method for the unpaid probe: GET (default; one POST retry on 405) or POST.","type":"string"},"url":{"description":"Absolute http(s) URL of the x402 endpoint to audit (required). Private/localhost blocked.","type":"string"}},"required":["url"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"description":"Horizon Pulse x402 endpoint audit report","type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-01","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":249,"error":null}],"description_full":"Audit any public x402 endpoint: one unpaid probe → 402 validity, x402 version, decoded price/network/asset, payTo type (EOA vs contract), discovery-metadata hints, pass/warn/fail checks; SSRF-safe; never pays","last_updated":"2026-09-30T18:38:18.05Z","schemes":["exact"]}