{"uid":"cap_jQwaaUzds1MXcDeYYggdi","slug":"402-com-tr-first-funder-wallet-origin-tracer-0d61fc9f","name":"402.com.tr First Funder / Wallet Origin Tracer","description":"🆕 Funding provenance in one call. Traces a Base wallet back to its EARLIEST transaction and resolves who first funded it: a recognized exchange/bridge (real on-ramp, lower risk), an anon EOA (possible sybil/burner — trace the cluster), or a contract. Returns the first funder, whether it's a contract or EOA, the initial value, and wallet age. The sybil/origin screen no other Base tool gives — the counterparty check before you transact. wallet= required. Not financial advice.","url":"https://402.com.tr/api/x402/first-funder","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"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":["wallet"],"properties":{"wallet":{"type":"string","description":"Wallet address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.04","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":"$0.04/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_LTUh7iT94RrMkCkm4kLV4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.04","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Traces a Base wallet to its earliest transaction to identify who first funded it — classifying the origin as a known exchange/bridge, anonymous EOA, or contract — for sybil and counterparty risk screening.","exampleAgentPrompt":"Before I send funds to 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD, can you trace who first funded that Base wallet — I want to know if it came from a real exchange or an anonymous EOA, and how old the wallet is?","exampleUseCases":[{"title":"Screen airdrop recipients for sybil risk","prompt":"I'm about to run an airdrop on Base and I need to screen these wallet addresses before distributing tokens — can you check who first funded each of them and flag any that look like fresh burners or anonymous EOA-funded wallets that might be sybil accounts?"},{"title":"Verify counterparty before DeFi transaction","prompt":"Before I go through with this OTC deal and send a large amount to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B on Base, can you trace where that wallet originally came from — was it funded by a real exchange or a random anon address, and how long has it been active?"},{"title":"Check wallet origin before onboarding user","prompt":"We're onboarding a new contributor to our DAO and they've given us their Base wallet — can you dig into who first funded it and how old it is before we grant them access and send their first payment?"}],"resultDescription":"Returns the address of the first funder, whether that funder is an EOA or contract, the initial ETH/token value sent, the wallet's age (derived from first transaction timestamp), and a classification of the origin (recognized exchange/bridge vs. anonymous EOA vs. contract) to indicate sybil/burner risk.","failureModes":["wallet parameter missing — returns 400 error","invalid or malformed wallet address — returns error","wallet has no transactions on Base (unfunded) — may return empty or error result","Base node RPC timeout causes lookup failure","payment not received — returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need to perform a sybil/origin screen on a Base wallet before transacting, airdropping, or onboarding a counterparty. It uniquely traces back to the very first funding event, not just recent history, providing the wallet-age and origin classification no generic block explorer query provides in one call. Prefer this over general counterparty screening when you specifically need funding provenance and origin classification.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:56:45.836Z","isFirstParty":false}