# Fund Trace (Source of Funds)

> Fund Trace (Source of Funds) is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-20).

Traces a wallet's funding chain up to 8 hops back to identify the origin as a CEX/bridge on-ramp, a sanctioned address, or an anonymous burner-cluster dead-end for compliance verdicts.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/fund-trace?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fund-trace-source-of-funds-25cd038d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vXGCL6jZcASpvS_OysXc8

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 fund-trace-source-of-funds-25cd038d
```

Example prompt: Trace the funding source of wallet 0x4e5b2e1dc62f3b840fb4fb929b97a5cc6b6c9cba back up to 6 hops and tell me whether it originated from a CEX, a sanctioned address, or just a cluster of anonymous wallets.

## When to prefer this

Choose this endpoint when you need a multi-hop provenance verdict rather than a single-hop funding check — especially for compliance workflows where you need to know whether funds ultimately trace back to a sanctioned entity, a legitimate CEX, or an anonymous cluster. Ideal for AML screening, investor due diligence, and DeFi protocol onboarding where a single-hop check would miss layered obfuscation. Not suitable when you need identity-level KYC (a CEX origin is a signal, not a person), or when real-time sub-second latency is critical.

## Known failure modes

- Internal-transfer funding breaks the chain and returns a dead-end verdict without being able to walk further
- Wallet has no on-chain funding history (fresh wallet with no inbound transactions)
- Chain reaches the 8-hop maximum without resolving to a known origin
- Requested wallet address is invalid or malformed
- Rate limiting or payment failure prevents the call from completing

## How this service works

first-funder goes one hop; this walks the funding chain back up to 8 hops to a recognisable origin (a CEX/bridge on-ramp — lower-risk provenance) OR a SANCTIONED address (dirty money, taint by provenance) OR a dead-end of fresh anon EOAs (the sybil/burner-cluster shape). One verdict compliance can refuse on. Best-effort: internal-transfer funding is invisible and ends the walk, never guessed. A CEX origin is a signal, not identity. Not financial advice.

## Output

A verdict classifying the wallet's funding origin: either a recognizable CEX or bridge on-ramp (lower-risk), a sanctioned address (high-risk taint), or a dead-end of fresh anonymous EOAs (sybil/burner-cluster pattern). Includes the hop depth reached and the chain path walked, stopping when an internal transfer makes further tracing impossible.

## 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": {
      "hops": {
       "type": "string",
       "description": "Max hops (default 5, max 8)"
      },
      "wallet": {
       "type": "string",
       "description": "Wallet to trace"
      }
     }
    }
   },
   "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/fund-trace-source-of-funds-25cd038d/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)