{"uid":"cap_0-2uXGznvPxQ8SQX8eB16","slug":"x402-base-tools-x402-payment-checker-6c0b7010","name":"x402 Base Tools – x402 Payment Checker","description":"Base mainnet data for agents, read live from the chain and paid per call in USDC: gas prices and costs, token prices from Uniswap and Aerodrome pools, balances, token info, transaction decoding, x402 payment checks, EIP-3009 authorization status, Basenames and address profiles. Lookups of things that do not exist are not charged.","url":"https://wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws/v1/x402-payment?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["hash"],"properties":{"hash":{"type":"string","description":"transaction hash (0x...)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"status":{},"is_x402":{},"payments":{},"facilitator":{}}}}}}},"responseSchema":{"type":"json","example":{"status":"success","is_x402":true,"payments":[{"payer":"0xa1d1...","pay_to":"0xe6f7...","seller":{"origins":["https://rtnl1z960zy00xyx.68r.lambda-web.us-east-1.on.aws"]},"amount_usd":0.01}],"facilitator":"0x2a89..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UO7o4Nm2ND8d6ui-53IpG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Given a Base transaction hash, checks whether it settled x402 payments (USDC transferWithAuthorization / EIP-3009), and returns payer, payTo address, amount in USDC, nonce, facilitator, and seller info from Bazaar listings.","exampleAgentPrompt":"Can you check if Base transaction 0x3a7f...b2c1 was an x402 payment — I want to know who the payer was, what they paid, and which facilitator handled it?","exampleUseCases":[{"title":"Confirm a customer micropayment settled","prompt":"I just got a transaction hash from a customer — 0xabc123... — can you verify it's actually an x402 payment and tell me how much USDC they sent and to which address?"},{"title":"Identify facilitator behind a payment","prompt":"For Base transaction 0xdef456..., can you pull up the x402 payment details and tell me which facilitator address routed it?"},{"title":"Resolve seller from payTo address","prompt":"I have a Base tx hash — 0x789ghi... — can you look up the x402 payment details and tell me which seller and origin URLs are associated with the payTo address?"}],"resultDescription":"Returns a JSON object with status ('success'), is_x402 boolean indicating whether the transaction contains x402 payments, a payments array (each with payer address, pay_to address, seller info including origin URLs and 30-day payers, amount in USD, and authorization nonce), and the facilitator address that sent the transaction.","failureModes":["Transaction hash not found on Base — returns error or empty result","Transaction exists but contains no EIP-3009 transferWithAuthorization events — is_x402: false","Invalid hash format (not 0x-prefixed or wrong length) — validation error","payTo address not listed in Bazaar — seller field may be null or empty","Network timeout or Lambda cold start — transient 5xx error","Hash of a transaction on a different chain (not Base) — may return no results or incorrect data"],"whenToPreferThis":"Use this endpoint when you need to verify whether a specific Base transaction hash represents a settled x402 payment using USDC transferWithAuthorization (EIP-3009), and want structured details about payer, payee, amount, nonce, facilitator, and seller identity from Bazaar listings — especially in agentic payment flows where confirming receipt of a micropayment before serving content is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:36:12.987Z","isFirstParty":false,"canonicalSlug":"x402-base-tools-x402-payment-checker-6c0b7010"}