{"uid":"cap_3XCgKsHzhYT8elyruTWyy","slug":"x-402-usdc-address-transfer-lookup-0911e0c5","name":"x-402 USDC Address Transfer Lookup","description":"See the USDC an address received and sent on Base, with x402 settlements identified. ERC-20 transfers of an address on Base, incoming and outgoing, with the x402 settlements identified by their EIP-3009 method. Totals, distinct senders, last settlement time. Default token is USDC. Data from Blockscout, first page, truncation declared. Query: ?address=&token=","url":"https://api.x-402.online/v1/chain/address?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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wIVpqVGb-dh3uZULL8Y6a","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns USDC ERC-20 transfer history (incoming and outgoing) for a Base address, with x402 payment settlements identified by EIP-3009 method, plus totals and sender stats.","exampleAgentPrompt":"Show me all the USDC transfers — incoming and outgoing — for the Base address 0xABC...123, and highlight which ones are x402 settlements.","exampleUseCases":[{"title":"Audit x402 revenue for a merchant","prompt":"Pull up all USDC received by 0xDEF...456 on Base and tell me which transfers are x402 settlements, how much total came in, and when the last payment was."},{"title":"Verify payment from a specific wallet","prompt":"Check whether the Base address 0x111...AAA has sent any USDC to 0x222...BBB recently — I want to see the full transfer history and any x402 payments identified."},{"title":"Monitor wallet activity for a developer","prompt":"Give me the USDC transfer summary for Base address 0x999...ZZZ — I need the total sent and received, the number of distinct senders, and any x402 protocol settlements flagged."}],"resultDescription":"A structured response containing paginated ERC-20 transfer records (first page) for the queried address on Base, with each transfer labeled as incoming or outgoing and x402 settlements flagged by their EIP-3009 method. Also includes aggregate totals for amount received and sent, count of distinct senders, and timestamp of the last x402 settlement. Truncation is declared when results exceed one page.","failureModes":["Invalid or malformed Base address returns an error or empty results","Unsupported token address causes fallback to USDC or error","Only first page of transfers returned — historical data may be truncated without pagination support","Blockscout data lag may mean very recent transfers are missing","Address with no transfer history returns zeroed totals"],"whenToPreferThis":"Choose this endpoint when you need a quick, structured summary of USDC (or other ERC-20) activity for a specific Base address, especially when you want x402 payment settlements automatically identified without building your own Blockscout query and EIP-3009 filter logic. It is ideal for merchant revenue audits, payment verification, and agent-driven accounting workflows on the Base chain. Prefer alternatives if you need multi-page history, multi-chain data, or non-ERC-20 native ETH transfers.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:42:20.398Z","isFirstParty":false,"canonicalSlug":"x-402-usdc-address-transfer-lookup-0911e0c5"}