# x402-tools Settle Once Diagnostic

> x402-tools Settle Once Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Performs a paid x402 protocol diagnostic ('settle once' SKU) that validates payment flow and returns diagnostic JSON after successful USDC micropayment

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/settleonce?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-settle-once-diagnostic-47fce3ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wK32EGOBTuDOzNcutKPBc

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-settle-once-diagnostic-47fce3ee
```

Example prompt: Run a settle-once x402 diagnostic on my public endpoint at https://myapi.example.com using a GET request to check if the payment flow and 402 response are working correctly.

## When to prefer this

Choose this endpoint when you need to validate or diagnose an x402 HTTP 402 payment flow end-to-end, specifically using the 'settle once' SKU via the OpenX402 facilitator. It is the right choice for developers building or debugging x402-gated APIs who need to confirm that USDC micropayments, EIP-3009 extras, and facilitator settlement are functioning correctly. Prefer this over generic HTTP probing tools when the goal is specifically x402 protocol compliance testing.

## Known failure modes

- HTTP 402 returned if payment is not included or fails — includes eip3009 payment instruction extras so the agent can retry with payment
- Invalid or unreachable target URL returns an error response
- Unsupported HTTP method (anything other than GET/HEAD/DELETE) will be rejected
- Non-OpenX402 facilitators are not supported and will fail payment settlement
- Malformed input object missing required 'type' or 'method' fields returns a schema validation error

## How this service works

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

## Output

Returns a JSON object containing the SKU name ('settleonce'), a price confirmation ('$0.03'), a title ('Settle Once'), and a diagnostic note. An unpaid request returns HTTP 402 with EIP-3009 payment extras; a paid request returns the diagnostic payload confirming successful payment settlement.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "description": "Public 402 or well-known URL. Defaults to this origin's Pipe Check."
      },
      "origin": {
       "type": "string",
       "description": "Public origin URL. Alias of url."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "settleonce",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.03",
  "title": "Settle Once"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-settle-once-diagnostic-47fce3ee/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)