# x402-tools Proof Ledger Diagnostics

> x402-tools Proof Ledger Diagnostics is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.22/call, status unknown (last checked 2026-10-10).

Returns a paid x402 diagnostic payload for the 'proofledger' SKU, demonstrating HTTP 402 / EIP-3009 payment gating with OpenX402 as facilitator.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/proofledger?utm_source=zero.xyz
- Price: $0.22/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-proof-ledger-diagnostics-cf2a639b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MLGNtPl3YgPKOZ-0u7K7Q

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-proof-ledger-diagnostics-cf2a639b
```

Example prompt: Run the x402 proofledger diagnostic to confirm that the EIP-3009 payment gating is working — I want to see the paid JSON response shape after settling $0.22 USDC via OpenX402.

## When to prefer this

Choose this endpoint when you need to test, diagnose, or demonstrate the x402 HTTP payment gating protocol with EIP-3009 extras specifically via the OpenX402 facilitator. It is ideal for developers integrating x402 into their own APIs who want a live reference endpoint that returns a predictable paid payload. Prefer this over generic HTTP testing tools when the goal is to validate USDC micropayment flows or inspect 402-with-eip3009 response structures.

## Known failure modes

- HTTP 402 returned when no valid x402 payment token is included — response includes eip3009 extras describing payment requirements
- Payment token invalid or expired — facilitator rejects and 402 is re-issued
- OpenX402 facilitator unavailable — request cannot be settled
- Malformed properties parameter — may result in unexpected response or error
- USDC balance insufficient to cover $0.22 per-call cost

## 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 name ('proofledger'), a human-readable title ('Proof Ledger'), the price ('$0.22'), and a diagnostic note confirming the paid JSON shape. If payment has not been provided, the endpoint returns HTTP 402 with EIP-3009 payment-required metadata instead.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "proofledger",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.22",
  "title": "Proof Ledger"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-proof-ledger-diagnostics-cf2a639b/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)