# x402 Taint Trace — Sanctioned Funds Detection on Base

> x402 Taint Trace — Sanctioned Funds Detection on Base is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Traces whether an EVM wallet's incoming funds originate from a sanctioned address within N hops on Base network

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/compliance/taint
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-taint-trace-sanctioned-funds-detection-on-base-f5f5b3fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Cg9SgBl5Jg462G6q_t52h

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 x402-taint-trace-sanctioned-funds-detection-on-base-f5f5b3fd -d '<json body>'
```

Example prompt: Before I accept this payment, can you check if the wallet 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD has any tainted funds tracing back to sanctioned addresses within 3 hops on Base?

## When to prefer this

Use this endpoint when you need to perform AML/sanctions compliance screening on a specific Base wallet before accepting an incoming payment, particularly when you need multi-hop fund-flow tracing rather than a simple address blocklist lookup. Prefer this over generic blockchain explorers when you need automated taint propagation analysis up to 3 hops deep.

## Known failure modes

- Invalid or malformed EVM address returns an error
- Hop count outside 1-3 range may be rejected or clamped to default
- Base node timeout or RPC failure causing trace to fail
- Address with no transaction history returns no-trace result
- Payment failure (insufficient USDC) blocks the call

## How this service works

Tainted-funds tracing: does this wallet's incoming money trace back to a sanctioned address within N hops? Multi-hop fund-flow trace on Base. Send { address, hops? }. Screen incoming payments before accepting them.

## Output

Returns a taint analysis result indicating whether the wallet's incoming funds trace back to any sanctioned address within the specified hop depth, including the fund-flow path and which sanctioned entity was detected if applicable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "hops": {
   "type": "number",
   "description": "Trace depth 1-3 (default 2)"
  },
  "address": {
   "type": "string",
   "description": "0x EVM address (Base)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-taint-trace-sanctioned-funds-detection-on-base-f5f5b3fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)