# FiatDock x402 Checker — Paid 402 Report

> FiatDock x402 Checker — Paid 402 Report is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Generates a paid x402 compliance report for a target URL or service, checking whether it correctly implements the HTTP 402 payment-required protocol

## Facts

- Endpoint: GET https://fiatdock.com/s/svc_8e048fbb-a2f6-42c2-bc8d-492c59fd090d?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fiatdock-x402-checker-paid-402-report-ad375843
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FOZH0b7B0bhnKf6_0dR2C

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 fiatdock-x402-checker-paid-402-report-ad375843
```

Example prompt: Run an x402 compliance check on my service endpoint and give me the full 402 report so I can see if it's properly implementing the payment-required flow.

## When to prefer this

Choose this endpoint when you need to verify that a specific service correctly implements the x402 HTTP 402 payment protocol — especially useful for developers building or auditing pay-per-call APIs, agents vetting third-party x402 services before integration, or debugging payment flow failures. It is more targeted than generic HTTP testing tools because it is specifically designed to interpret 402 payment-required responses and report on x402 protocol conformance.

## Known failure modes

- Missing required tool arguments returns an argument error that is still billed as a paid call
- Target service may be offline or unreachable, returning a connectivity error
- Malformed JSON-RPC body may cause the seller MCP endpoint to reject the request
- Incomplete tool name or params may yield a partial or empty report
- Unknown tool name returns an error from the underlying MCP server

## How this service works

Pay-per-call: x402 Checker — paid 402 report

## Output

A structured 402 report detailing the x402 protocol compliance of the target service, including HTTP 402 response shape, payment header details, protocol conformance verdict, and any detected issues with the pay-per-call implementation.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiatdock-x402-checker-paid-402-report-ad375843/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fiatdock.com](https://www.zero.xyz/host/fiatdock.com/llms.txt)