# AgentRXI x402 Endpoint Checker

> AgentRXI x402 Endpoint Checker is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).

Tests any x402-enabled URL for correct 402 response, pricing, networks, pay-to address, discovery metadata, CORS, response time, and Coinbase validator compliance, listing all issues found.

## Facts

- Endpoint: GET https://agentrxi.com/v1/x402/check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-x402-endpoint-checker-5b9ccf5d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JX0e3lYNfWObG3ToqWcU-

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 agentrxi-x402-endpoint-checker-5b9ccf5d
```

Example prompt: Can you run a full x402 compliance check on https://myapi.example.com/premium-endpoint and tell me every issue I need to fix — including the price, networks, pay-to address, CORS, and whether it passes Coinbase's validator?

## When to prefer this

Use this endpoint when you need to verify that an x402-enabled URL is correctly configured before integrating it as a payer, or before launching your own x402 endpoint. It is the go-to tool for x402 protocol compliance auditing, covering all key dimensions (402 status, pricing, networks, CORS, Coinbase validator) in a single call. Prefer this over manual inspection or general HTTP testing tools when x402-specific compliance is the concern.

## Known failure modes

- Target URL is unreachable or times out — returns connectivity error
- Target URL does not return a 402 at all — reported as a critical issue
- Malformed URL input — validation error before request is made
- Target URL returns an unexpected HTTP error — reported with status code
- Coinbase validator API unavailable — partial results with validator section skipped

## How this service works

x402 endpoint checker: tests any paid x402 URL for a correct 402, price and networks, pay-to address, discovery metadata, CORS, response time and Coinbase's validator, and lists every issue to fix.

## Output

Returns a detailed diagnostic report covering: whether the URL returns a valid 402 status, the declared price and supported networks, the pay-to address, discovery metadata, CORS configuration, response time, Coinbase validator pass/fail result, and a structured list of every compliance issue found that needs to be fixed.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      },
      "method": {
       "type": "string",
       "description": "GET (default) or POST"
      }
     }
    }
   },
   "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/agentrxi-x402-endpoint-checker-5b9ccf5d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)