# 402.com.tr First Funder / Wallet Origin Tracer

> 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.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/first-funder
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/402-com-tr-first-funder-wallet-origin-tracer-0d61fc9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jQwaaUzds1MXcDeYYggdi

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 402-com-tr-first-funder-wallet-origin-tracer-0d61fc9f
```

Example prompt: 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?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/402-com-tr-first-funder-wallet-origin-tracer-0d61fc9f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)