{"slug":"horizonpulse-dev-api-research-report-brief-1334c8","title":"Verified brief (schema brief-verified/1), on-chain live values and x402 spec fac","host":"horizonpulse.dev","method":"GET","resource":"https://horizonpulse.dev/api/research/report/brief","category":"market","description":"Verified brief (schema brief-verified/1), on-chain live values and x402 spec facts only: answer plus 2-8 claims, each with an evidence array (verbatim quote, URL, retrieval time, body hash, offset; or chain, block and block time for on-chain reads). Charged only if >=2 claims are confirmed (2 publis","price_listed":1.0,"price_asked":1.0,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":319,"reported_calls_30d":0,"reported_payers_30d":0,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"q":"How much USDC is in circulation"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"q":{"description":"Question (required). Accepted: Base or Ethereum gas (on-chain read), USDC supply on Ethereum and Base (on-chain totalSupply), or an x402 spec fact. Anything else is refused with 422 before payment. No personal data.","type":"string"}},"required":["q"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"description":"Verified brief (schema brief-verified/1): answer plus 2-8 claims, each with an evidence array. Charged only if at least 2 claims are confirmed in two independent sources as defined at /contracts/brief-verified; otherwise 422, unpaid. The example is a trimmed real passing brief recorded at 2026-10-20T03:43:25Z (GET /api/demo/brief-verified); live values differ on every call. Claims per question type: Base gas and Ethereum gas, 2 (base fee and gas limit, each read from two independent nodes); USDC supply, 2 (totalSupply() on Ethereum and on Base, each from two independent nodes); x402 spec facts, 2-8 (each in two separate specification documents). Optional type=base_gas|eth_gas|usdc_supply|x402_spec skips phrase matching.","type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-20","reachable":true,"status":402,"valid_402":true,"asked_usdc":1.0,"price_match":true,"latency_ms":319,"error":null}],"description_full":"Verified brief (schema brief-verified/1), on-chain live values and x402 spec facts only: answer plus 2-8 claims, each with an evidence array (verbatim quote, URL, retrieval time, body hash, offset; or chain, block and block time for on-chain reads). Charged only if >=2 claims are confirmed (2 publishers, 2 nodes, or 2 x402 spec documents) and every quote verifies; otherwise unpaid. Contract: horizonpulse.dev/contracts/brief-verified. Not advice. No personal data in q.","last_updated":"2026-10-20T14:40:42.633Z","schemes":["exact"]}