# x402-tools Passport Stamp Diagnostic

> x402-tools Passport Stamp Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-10-12).

Returns a paid diagnostic JSON payload (passport stamp SKU) via the x402 micropayment protocol, requiring $0.15 USDC per call facilitated by OpenX402.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/passportstamp?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-passport-stamp-diagnostic-04f48f5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wrlG_QeLY27kO9HcQ7uCK

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-passport-stamp-diagnostic-04f48f5c
```

Example prompt: Run the passport stamp diagnostic on the x402 test endpoint so I can confirm my eip3009 USDC payment flow is working end-to-end.

## When to prefer this

Choose this endpoint when you need a live, real-money x402 micropayment integration test using the OpenX402 facilitator with eip3009 authorization. It is the right choice for verifying that an x402 client stack — including payment header construction, USDC authorization, and 402-response parsing — works correctly end-to-end. Not suitable for production data retrieval or non-diagnostic use cases.

## Known failure modes

- HTTP 402 returned if no valid eip3009 payment authorization is included in the request
- Payment authorization expired or invalid — eip3009 token rejected by OpenX402 facilitator
- Insufficient USDC balance to cover the $0.15 per-call fee
- Facilitator unavailable — OpenX402 service unreachable, causing settlement failure
- Malformed request properties parameter causes 400 or unexpected response

## How this service works

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

## Output

A JSON object containing the SKU identifier ('passportstamp'), a diagnostic note, the price ('$0.15'), and a title ('Passport Stamp'). If payment is not attached, returns HTTP 402 with eip3009 payment-required details including facilitator and payment channel information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "passportstamp",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.15",
  "title": "Passport Stamp"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-passport-stamp-diagnostic-04f48f5c/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)