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402.com.tr First Funder / Wallet Origin Tracer
x402
402.com.tr First Funder / Wallet Origin Tracer is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-13).
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.
Price / call$0.04
Success—
StatusUnknown
How this service works
🆕 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.
Output
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.
Example use cases
Screen airdrop recipients for sybil risk
“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?”
Verify counterparty before DeFi transaction
“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?”
Check wallet origin before onboarding user
“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?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/first-funderWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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