{"uid":"cap_NaHffhTxhD3h5D_5wZTmC","slug":"byte-library-x402-gateway-evidence-pack-feed-64e15cbd","name":"BYTE Library x402 Gateway – Evidence Pack Feed","description":"Cryptographically attested, first-party data feeds for AI agents — covering crypto markets, DeFi yields, weather, earthquakes, news, code-pulse, threat-intel, address reputation, sanctions screening, and supply-chain verdicts. Every paid response carries EIP-712 receipts you verify before acting: (1) a GATEWAY delivery-integrity receipt (X-BYTE-Attestation header, signed by the PayPerByte gateway key) proving these are exactly the bytes we served; and (2) on the 14 attested feeds (provenance:eip712-attested in GET /feeds), a LIVE per-feed PayloadAttestation by that feed's OWN distinct publisher key, anchored ON-CHAIN — recover it from the broadcast the response references via txHash. (Separately, the POST verdict oracles embed their own per-feed `attestation` directly in the response body — recover attestation.signer.) Both attest authenticity + tamper-evidence under the BYTE Library domain. NEITHER asserts the correctness of the underlying data or any verdict, and NEITHER claims an independent third-party data source signed it — all keys are first-party PayPerByte. Pay per call in USDC over x402 with no API keys — a wallet, not a secret on the box. Settlement is on Base (eip155:8453). Price is per-feed, derived from expected payload size at $0.005000/KB (floor $0.001000).","url":"https://x402.payperbyte.io/feeds/evidence-pack","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["claim"],"properties":{"claim":{"type":"string","minLength":1,"description":"The statement to research and ground against cited sources — returns a signed citation bundle (retrieved sources + excerpts), e.g. \"USDC is fully reserved 1:1\". The receipt proves provenance/integrity of the returned bundle, NOT that the statement is true; no correctness or fact-check verdict is asserted."},"domains":{"type":"array","items":{"type":"string"},"description":"Optional allowlist of source domains to retrieve evidence from (e.g. [\"sec.gov\", \"circle.com\"]). Omit to search all indexed PayPerByte factual feeds."},"max_sources":{"type":"integer","minimum":1,"description":"Optional cap on the number of cited sources in the returned evidence pack — bounds the response size. The price is a flat $0.02 per call regardless of how many sources are returned (it is not metered per source)."},"subscriber_address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Optional. The Arbitrum address bound to the signed EIP-712 request, so a leaked query cannot burn another wallet's escrow."}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"feed":"evidence-pack"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_evowDboH_ITxAmF6cGelz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a cryptographically signed, EIP-712 provenance-stamped evidence pack data feed payload, paid per call in USDC via x402 on Base with no API key required","exampleAgentPrompt":"Fetch me the evidence-pack feed from BYTE Library — pay the $0.05 USDC per-call fee from my Base wallet and give me back the cryptographically signed, EIP-712 provenance-stamped payload.","exampleUseCases":[{"title":"Sanctions screening with on-chain proof","prompt":"Check this wallet address against the sanctions list and give me back the signed EIP-712 evidence pack — pay the fee from my Base wallet in USDC so I have a tamper-evident audit trail I can show compliance."},{"title":"DeFi yield data for trustless pipeline","prompt":"Pull the latest DeFi yield feed from PayPerByte, pay the per-call USDC fee from my Base wallet, and hand me the cryptographically attested payload with the EIP-712 receipt so my downstream smart contract can verify it before acting."},{"title":"Earthquake alert with verifiable provenance","prompt":"Grab the earthquake feed right now — settle the cost in USDC from my Base wallet, no API key, and return the full provenance-stamped evidence pack with the on-chain attestation so I can prove the data integrity to anyone auditing my pipeline."}],"resultDescription":"A JSON payload containing the 'evidence-pack' feed data, cryptographically signed and stamped with an EIP-712 PayloadAttestation proving data provenance, settled on Base (eip155:8453). Payment of $0.05 USDC is deducted via x402 before the payload is released.","failureModes":["Insufficient USDC balance — payment fails, feed not returned","Invalid or missing x402 payment header — 402 Payment Required response","Wallet not on Base (eip155:8453) — settlement chain mismatch error","Feed name not recognized — 404 or empty response","Network congestion on Base causing settlement delay — timeout or retry needed","Malformed POST body — 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when an AI agent needs cryptographically verifiable, provenance-stamped data and must prove data integrity to downstream consumers — especially when no API key management is desired and payment via USDC wallet on Base is acceptable. Ideal for trustless, audit-trail-required pipelines where signed attestations matter more than raw throughput.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T17:27:19.810Z","isFirstParty":false}