# ARAKEL Payment Risk Check

> ARAKEL Payment Risk Check is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-13).

Performs a preflight OFAC sanctions risk check on a destination wallet address and verifies a Base USDC payment transaction with machine-signed evidence over x402.

## Facts

- Endpoint: POST https://proof.arakelproof.space/v1/x402/payment-risk-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arakel-payment-risk-check-ba2a05ea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xk_GiSHmKZ6LgOrzHT-xX

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 arakel-payment-risk-check-ba2a05ea -d '<json body>'
```

Example prompt: Before we send that USDC payment on Base, screen the destination wallet 0xAbC...123 for OFAC sanctions risk and verify the transaction hash 0xdef...456 was confirmed with at least 3 confirmations and the expected amount of 50 USDC went to the right payee.

## When to prefer this

Choose this endpoint when an autonomous agent needs both a compliance sanctions screen (OFAC) AND cryptographic payment verification in a single call over the x402 micropayment protocol. Prefer it over generic blockchain explorers when you need a machine-signed, audit-ready receipt binding the payment to specific request/response hashes. Best suited for agent-to-agent payment workflows on Base where regulatory compliance evidence is required.

## Known failure modes

- Transaction hash not found or not yet confirmed on Base — returns unverified decision
- Destination wallet matches OFAC sanctions list — returns high risk_level with flags populated
- Insufficient confirmations — verification withheld until min_confirmations threshold met
- Mismatched payee or amount — payment decision returned as unverified
- Invalid or malformed wallet address input — request rejected
- x402 payment not included or insufficient — endpoint returns 402 Payment Required

## How this service works

$0.001 OFAC destination-wallet preflight for autonomous agents, plus machine-verifiable official-source evidence over x402 USDC on Base.

## Output

Returns a JSON object containing a risk_score (numeric), risk_level (e.g. 'low'), OFAC flags array, a payment decision ('VERIFIED' or otherwise), a verified boolean, and an Ed25519 signature binding the payment to the caller-supplied request/response hashes. Schema field is 'arakel.x402.payment-risk-check.v1'.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tx": {
   "type": "string",
   "description": "Base transaction hash"
  },
  "service_id": {
   "type": "string"
  },
  "request_hash": {
   "type": "string",
   "description": "SHA-256 style 32-byte request hash for receipt binding"
  },
  "response_hash": {
   "type": "string",
   "description": "SHA-256 style 32-byte response hash for receipt binding"
  },
  "expected_payee": {
   "type": "string",
   "description": "Expected USDC recipient"
  },
  "expected_payer": {
   "type": "string",
   "description": "Optional expected USDC payer"
  },
  "min_confirmations": {
   "type": "integer",
   "maximum": 200,
   "minimum": 1
  },
  "expected_amount_usdc": {
   "type": "string",
   "description": "Expected USDC decimal amount; provide this or expected_amount_atomic"
  },
  "expected_amount_atomic": {
   "type": "string",
   "description": "Expected USDC amount in 6-decimal atomic units; provide this or expected_amount_usdc"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flags": [],
  "schema": "arakel.x402.payment-risk-check.v1",
  "payment": {
   "decision": "VERIFIED",
   "verified": true
  },
  "signature": {
   "alg": "Ed25519"
  },
  "risk_level": "low",
  "risk_score": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arakel-payment-risk-check-ba2a05ea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proof.arakelproof.space](https://www.zero.xyz/host/proof.arakelproof.space/llms.txt)