# x402-tools Head-Get-Drift Diagnostics

> x402-tools Head-Get-Drift Diagnostics is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Runs a paid x402 protocol diagnostic (HEAD/GET/DELETE method probe) against a public URL to detect 402 payment-gating behavior and EIP-3009 payment metadata.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/headgetdrift?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-head-get-drift-diagnostics-fb002e23
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8uxqJSc4CQitApR8S2IvH

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-head-get-drift-diagnostics-fb002e23
```

Example prompt: Can you run a GET-method x402 diagnostic on https://example.com/api/paid-endpoint to check whether it properly returns a 402 with EIP-3009 payment metadata when unpaid?

## When to prefer this

Use this endpoint when you need to verify that a public URL is correctly implementing the x402 HTTP payment protocol — specifically to check for 402 responses, inspect EIP-3009 payment header metadata, or validate payment-gate compliance. It is the right choice when you want a cheap ($0.02), fast, programmatic probe of payment-gated APIs using GET, HEAD, or DELETE methods, and when you are operating within the OpenX402 facilitator ecosystem.

## Known failure modes

- Unpaid request returns HTTP 402 with EIP-3009 extras instead of diagnostic result — payment must be included
- Invalid or unreachable target URL returns an error or timeout
- Non-x402 URLs may return no meaningful payment gate data
- Facilitator must be OpenX402; other facilitators are not supported and will fail
- Missing required 'type' or 'method' fields in input causes 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 ('headgetdrift'), a human-readable title ('Head Get Drift'), the price ($0.02), and diagnostic notes about the x402 payment gate behavior detected at the probed URL, including any EIP-3009 payment metadata present in the 402 response.

## 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"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    }
   }
  },
  "inputSchema": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "headgetdrift",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Head Get Drift"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-head-get-drift-diagnostics-fb002e23/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)