# x402helper.xyz Rail Matrix — OFAC Screening, Rates & Billing Verification

> x402helper.xyz Rail Matrix — OFAC Screening, Rates & Billing Verification is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-31).

Returns OFAC screening results, exchange rates, and billing verification data for AI agent micropayment workflows, paid per-call via x402 USDC micropayment.

## Facts

- Endpoint: GET https://x402helper.xyz/529639/api/rail/matrix?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402helper-xyz-rail-matrix-ofac-screening-rates-billing-verification-4c0408ea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L8fCp9AtrT1gs3schAUGF

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 x402helper-xyz-rail-matrix-ofac-screening-rates-billing-verification-4c0408ea
```

Example prompt: Before processing this USDC payment, run an OFAC sanctions screen and pull the current m2m_usdc rates so I know we're clear to proceed.

## When to prefer this

Choose this endpoint when your AI agent needs to perform OFAC sanctions screening, fetch USDC exchange rates, or verify billing eligibility as part of a machine-to-machine payment workflow and is capable of handling x402 USDC micropayments ($0.013 per call). It is particularly suited for automated agent pipelines that need compliance checks before executing crypto payments.

## Known failure modes

- Invalid 'case' query parameter value returns HTTP 400 with an error message and hint
- Missing or malformed input schema returns a 400 validation error
- Payment not received or x402 handshake failure results in a 402 Payment Required response
- Network or upstream service unavailability returns 5xx errors
- OFAC data feed temporarily unavailable may return empty or stale results

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

A JSON object with a 'success' boolean and a 'result' object containing OFAC screening outcome, exchange rate data, or billing verification details depending on the 'case' query parameter supplied (m2m_usdc, fiat_consent, or checkout).

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "case": {
       "enum": [
        "m2m_usdc",
        "fiat_consent",
        "checkout"
       ],
       "type": "string",
       "default": "m2m_usdc",
       "example": "m2m_usdc",
       "description": "Decision case. Default m2m_usdc. Invalid value → 400 { error, hint }."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402helper-xyz-rail-matrix-ofac-screening-rates-billing-verification-4c0408ea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)