# Peyon x402 Endpoint Checker

> Peyon x402 Endpoint Checker is a paid API for AI agents from peyon.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Inspects any x402-enabled endpoint's 402 response to extract and validate its version, payment scheme, network, asset type, price, payTo address, resource URL, description, and Bazaar discovery metadata — without making a payment.

## Facts

- Endpoint: GET https://peyon.ai/api/x402-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/peyon-x402-endpoint-checker-3134651a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nLxh4H073Q33FGMhRLxQM

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 peyon-x402-endpoint-checker-3134651a
```

Example prompt: Can you inspect the x402 payment requirements for https://example.com/api/data using a GET request — I want to know the price, the payTo address, which network and asset it uses, and whether its Bazaar metadata is valid?

## When to prefer this

Use this endpoint when you need to inspect, audit, or validate the payment configuration of any x402-protected API before attempting a payment or integration. It is the go-to tool for checking whether an x402 endpoint is properly configured, USDC-compatible, and discoverable on Bazaar — without spending any funds. Prefer it over manually parsing 402 headers or attempting a live payment just to discover pricing and network details.

## Known failure modes

- URL does not return a 402 response — endpoint may not be x402-enabled
- Malformed or non-compliant 402 response body — parsing fails
- Network timeout or unreachable endpoint
- Endpoint requires a method not supported (e.g. POST) — only GET, HEAD, DELETE accepted
- Bazaar metadata absent or fails schema validation — reported as invalid
- Invalid or non-HTTPS URL provided

## How this service works

Checks any x402 endpoint's unpaid 402 response: x402 version, accepted scheme, network, asset (is it USDC), price, payTo, https resource url, description, and Bazaar discovery metadata validated against its schema. Makes no payment.

## Output

Returns the parsed contents of the endpoint's 402 response including x402 protocol version, accepted payment scheme, blockchain network, asset type (with a flag indicating whether it is USDC), price, payTo wallet address, the HTTPS resource URL, a human-readable description, and a validation result for the endpoint's Bazaar discovery metadata against its expected schema. No payment is initiated.

## 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/peyon-x402-endpoint-checker-3134651a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from peyon.ai](https://www.zero.xyz/host/peyon.ai/llms.txt)