{"uid":"cap_fhPuUU6Ud7hO4GaBC7d1K","slug":"onchain-evidence-d75599fb","name":"Onchain Evidence","description":"Capture supplied public explorer or RPC evidence with immutable content hashes","url":"https://phion.systems/v1/paid/trust/onchain-evidence?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input","output"],"properties":{"input":{"type":"object","required":["body"],"properties":{"body":{"type":"object","additionalProperties":true}}},"output":{"type":"object","required":["example"],"properties":{"example":{"type":"object","additionalProperties":true}}}}},"responseSchema":{"type":"json"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_asK6nMpTLHow9eVIj_9-b","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Captures public blockchain explorer or RPC data as immutable evidence with cryptographic content hashes","exampleAgentPrompt":"Capture and hash this Etherscan transaction page as immutable on-chain evidence so I have a tamper-evident record of its state right now: https://etherscan.io/tx/0xabc123...","exampleUseCases":[{"title":"Compliance audit trail for DeFi transaction","prompt":"I need to preserve immutable evidence of this Uniswap swap transaction for our compliance records — can you capture and hash the Etherscan page at https://etherscan.io/tx/0xdef456 right now so we have a cryptographically verifiable snapshot?"},{"title":"Smart contract state snapshot before upgrade","prompt":"Before we upgrade this contract, I want a tamper-evident record of its current state — please capture the on-chain evidence from https://etherscan.io/address/0xabc789 and give me back the content hash so we can prove what it looked like before the change."},{"title":"Counterparty payment proof for dispute resolution","prompt":"Our counterparty claims they sent payment but we're disputing it — can you capture the RPC evidence for transaction 0x123abc on the Ethereum mainnet explorer and give me an immutable hash I can use as proof in arbitration?"}],"resultDescription":"Returns an immutable evidence record containing the captured public explorer or RPC data, a cryptographic content hash of that data, a timestamp, and provenance metadata — allowing any party to verify that the captured content has not been altered since capture.","failureModes":["Invalid or inaccessible explorer URL returns an error indicating the source could not be fetched","RPC endpoint unavailable or rate-limited results in a capture failure","Malformed input schema causes a 400-level validation error","Content hash cannot be computed if the source returns dynamic or non-deterministic content","Payment not processed via x402 protocol results in a 402 Payment Required response"],"whenToPreferThis":"Use this endpoint when you need cryptographically verifiable, immutable proof of on-chain data from public blockchain explorers or RPC sources — especially for compliance, dispute resolution, or audit trails. Prefer this over simple web scraping when tamper-evidence and content integrity hashes are required, and over general blockchain queries when you need a signed, timestamped evidence artifact rather than raw data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T18:48:22.577Z","isFirstParty":false,"canonicalSlug":"onchain-evidence-d75599fb"}