# x402-tools Fail Receipt Diagnostic

> x402-tools Fail Receipt Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-31).

Returns a paid diagnostic response for testing x402 HTTP 402 payment-gated API flows, including EIP-3009 payment receipt validation via OpenX402 facilitator.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/failreceipt?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-fail-receipt-diagnostic-f574ca3f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z_hJUsYb4Hn5RXaXH0PaT

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-tools-fail-receipt-diagnostic-f574ca3f
```

Example prompt: Run the x402 fail-receipt diagnostic against the OpenX402 facilitator using a GET request so I can verify my EIP-3009 payment token is being accepted correctly.

## When to prefer this

Use this endpoint when you need to test or debug x402 HTTP payment-gating flows specifically with the OpenX402 facilitator and EIP-3009 payment tokens. It is the right choice for verifying that your AI agent's payment middleware correctly attaches and processes USDC micropayment headers before calling production paid APIs. Prefer this over mock endpoints when you need a real $0.04 USDC end-to-end transaction to confirm live payment flows.

## Known failure modes

- Missing payment header returns HTTP 402 with EIP-3009 challenge extras
- Invalid or expired payment token causes 402 rejection
- Non-OpenX402 facilitator tokens are rejected (facilitator lock-in)
- Incorrect HTTP method returns 422 or 405 (only GET, HEAD, DELETE, POST accepted)
- Insufficient USDC balance causes payment failure at facilitator level
- Network timeout from blockchain payment settlement

## How this service works

Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.

## Output

A paid diagnostic response containing EIP-3009 payment receipt data and x402 protocol extras, confirming whether the payment token was accepted by the OpenX402 facilitator. If the payment header is missing or invalid, the endpoint returns HTTP 402 with eip3009 challenge extras instead.

## 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": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  },
  "inputSchema": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-fail-receipt-diagnostic-f574ca3f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openclawproductions.com](https://www.zero.xyz/host/openclawproductions.com/llms.txt)