{"uid":"cap_pfiz4Ap7j_4a3BYZUbn-i","slug":"tollkit-attest-chain-transaction-lookup-8f61303a","name":"Tollkit Attest – Chain Transaction Lookup","description":"Pay-per-call product page extraction. No account, no API key: pay in-band with x402 in USDC on Base or Solana.","url":"https://attest.tollkit.dev/chain/tx?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"hash":{"type":"string","pattern":"^(0x[0-9a-fA-F]{64}|[1-9A-HJ-NP-Za-km-z]{64,88})$","description":"Transaction hash, or base58 signature on Solana."},"chain":{"enum":["base","ethereum","solana"],"type":"string","default":"base","description":"Which chain to read: \"base\" (default), \"ethereum\" or \"solana\"."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1g3UsX8JdOR13VSHhYXS_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up and attests blockchain transaction details by hash on Base, Ethereum, or Solana, returning signed evidence of the transaction's content.","exampleAgentPrompt":"Can you look up transaction 0x3a9f2c1d8b4e7f0a6c5d2e1b8a3f9c0d7e4b2a1f5c8d3e6b9a2f0c7d4e1b8a3f on Base and give me the details?","exampleUseCases":[{"title":"Verify a crypto payment receipt","prompt":"I sent USDC to a vendor and they claim they didn't receive it — can you check transaction 0x3a9f2c1d8b4e7f0a6c5d2e1b8a3f9c0d7e4b2a1f5c8d3e6b9a2f0c7d4e1b8a3f on Base and tell me what actually happened?"},{"title":"Attest a Solana NFT transfer","prompt":"Can you pull the details and get signed attestation for this Solana transaction signature: 5KtPn1LGuxDs5u1hMDkTpUmGiTqMJ4u7XhKdC9bqMEzrHvNpDw2RfJVLa8YcQsWx?"},{"title":"Confirm Ethereum DeFi transaction","prompt":"My DeFi swap on Ethereum should have gone through — look up 0xabc123def456789012345678901234567890abcdef1234567890abcdef123456 and verify the transaction details for me."}],"resultDescription":"Returns signed, timestamped attestation of the transaction's on-chain details including status, amounts, addresses, and cryptographic proof that the transaction occurred as recorded on the specified blockchain.","failureModes":["Invalid transaction hash format — must be 0x-prefixed 64-char hex for EVM chains or base58 signature for Solana","Transaction not found on the specified chain","Wrong chain specified for the given hash format","Payment failure via x402 if wallet has insufficient USDC","Network timeout if blockchain RPC is slow"],"whenToPreferThis":"Choose this endpoint when you need signed, attested proof of a specific blockchain transaction — not just raw RPC data. Ideal when you need tamper-evident, timestamped evidence (e.g. for dispute resolution, audit trails, or agent-to-agent payment verification) and want to pay per-call without an account or API key using x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T12:36:11.195Z","isFirstParty":false,"canonicalSlug":"tollkit-attest-chain-transaction-lookup-8f61303a"}