# x402 Paid MCP — OFAC SDN Priority Search

> x402 Paid MCP — OFAC SDN Priority Search is a paid API for AI agents from x402-paid-mcp.vercel.app, paid per call via x402, $1/call, status unknown (last checked 2026-10-13).

Searches the OFAC Specially Designated Nationals (SDN) list for a given query string, returning fuzzy-matched sanctions screening results via a pay-per-call x402 micropayment endpoint.

## Facts

- Endpoint: POST https://x402-paid-mcp.vercel.app/api/v1/ofac-sdn-priority?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-paid-mcp-ofac-sdn-priority-search-67259939
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qwYVtRHQ-Uyt647MqQF83

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-paid-mcp-ofac-sdn-priority-search-67259939 -d '<json body>'
```

Example prompt: Search the OFAC SDN list for 'Tornado Cash' with a match threshold of 0.8 and return up to 5 results — I need to know if this entity is sanctioned before proceeding.

## When to prefer this

Use this endpoint when you need real-time, pay-per-call OFAC SDN sanctions screening without a subscription, especially in crypto-native or agent workflows that support x402 micropayments in USDC. Prefer this over bulk screening APIs when you need on-demand spot checks with configurable fuzzy matching thresholds.

## Known failure modes

- Empty results if query doesn't fuzzy-match anything above the threshold
- Payment failure if USDC balance is insufficient or x402 payment handshake fails
- Invalid input if query string is missing (required field)
- Threshold out of range causing no results or overly broad matches
- Network or upstream OFAC data fetch errors returning 5xx

## How this service works

Paid MCP wrapping live x402 OFAC SDN and SHA-256 meters. USDC on Base (preferred) and Solana.

## Output

Returns a list of SDN matches ranked by similarity score, including matched entity names, SDN entry details, and confidence/match scores, filtered by the specified threshold and capped at the requested limit.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "limit": {
   "type": "integer"
  },
  "query": {
   "type": "string"
  },
  "threshold": {
   "type": "number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-paid-mcp-ofac-sdn-priority-search-67259939/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-paid-mcp.vercel.app](https://www.zero.xyz/host/x402-paid-mcp.vercel.app/llms.txt)