{"uid":"cap_XvsC5Ee8oBngWujaMgaND","slug":"x402-transaction-verifier-lab-paidapis-net-f83fce47","name":"x402 Transaction Verifier (lab.paidapis.net)","description":"Oracle: checks whether a base transaction hash has confirmed on-chain, and returns a signed (EIP-191) yes/no attestation — verifiable independently against 0x5a6d60f11C0E33f97E2De12b8B2b70d1B1FE9Efc, without trusting us again on a later call.","url":"https://lab.paidapis.net/api/verify-tx","method":"GET","headers":{},"bodySchema":{"type":"object","required":["txHash"],"properties":{"txHash":{"type":"string","description":"32-byte transaction hash to check."}}},"responseSchema":{"type":"object","properties":{"chain":{"type":"string"},"txHash":{"type":"string"},"checkedAt":{"type":"string"},"confirmed":{"type":"boolean"},"signature":{"type":"string"},"blockNumber":{"type":["integer","null"]},"signerAddress":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/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_Sey_2ADdrvIAIoxemVPvn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given blockchain transaction hash is confirmed on Base mainnet and returns a signed attestation of its status.","exampleAgentPrompt":"Can you check whether transaction 0x3a7f2b91c4e0d5a8f6b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4 is confirmed on Base mainnet and give me a signed attestation of its status?","exampleUseCases":[{"title":"Verify USDC payment receipt","prompt":"I need to confirm that the USDC payment with tx hash 0xabc123def456...7890 actually went through on Base — can you check if it's confirmed and get me a signed proof?"},{"title":"Gating content behind confirmed payment","prompt":"Before I unlock this file for the user, check that their transaction 0x1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b is confirmed on Base mainnet and return the verification signature."},{"title":"Debugging a failed x402 payment flow","prompt":"My x402 payment might have stalled — can you verify whether tx hash 0xdeadbeef112233445566778899aabbccddeeff00112233445566778899aabbcc shows as confirmed on Base so I can figure out what went wrong?"}],"resultDescription":"Returns a JSON object with the chain name, the queried txHash, a checkedAt timestamp, a boolean confirmed flag, the block number (or null if unconfirmed), the signer address of the attestation service, and a cryptographic signature over the result — enabling downstream consumers to trust the confirmation report without querying the chain themselves.","failureModes":["Invalid or malformed txHash (not 32 bytes / wrong format) — likely a 400 or validation error","Transaction not yet indexed or very recent — may return confirmed: false even if eventually finalizing","Network or RPC outage on Base — service may be temporarily unavailable","Payment failure via x402 — call rejected before reaching verification logic if USDC payment is not valid","Unknown txHash (never existed) — returns confirmed: false with null blockNumber"],"whenToPreferThis":"Use this endpoint when you need a lightweight, signed attestation that a specific Base mainnet transaction is confirmed — especially in x402-payment or pay-per-call contexts where you want a cryptographic proof rather than raw RPC data. Prefer it over direct RPC calls when you need the signed signer-address attestation for downstream trust, or when you are building on the x402 protocol stack and want a consistent verification pattern. Not suitable for other chains or for streaming/real-time finality monitoring.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:38:35.712Z","isFirstParty":false}