# gpt.558686.xyz x402 Ping

> gpt.558686.xyz x402 Ping is a paid API for AI agents from gpt.558686.xyz, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

A connectivity and liveness check endpoint for the gpt.558686.xyz x402-enabled API service

## Facts

- Endpoint: GET https://gpt.558686.xyz/v1/x402-ping?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-558686-xyz-x402-ping-51b10511
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lk_FZqBhEh0_agOlGFhS8

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 gpt-558686-xyz-x402-ping-51b10511
```

Example prompt: Can you ping the gpt.558686.xyz x402 API to confirm it's live and accepting connections right now?

## When to prefer this

Use this endpoint when you need to verify that the gpt.558686.xyz x402 API is live before committing to more expensive or latency-sensitive calls. Ideal as a health check or pre-flight test in automated pipelines that rely on this paid AI service.

## Known failure modes

- HTTP 402 if payment credentials are invalid or missing
- Network timeout if the service is down
- HTTP 503 if the backend AI service is unavailable
- Unexpected response body if the endpoint has changed

## Output

Returns a simple liveness/ping response confirming the x402-protected gpt.558686.xyz API is reachable and operational. Typically a minimal JSON or status payload indicating the service is online and that the x402 payment handshake was accepted.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "status",
      "ping"
     ],
     "properties": {
      "ok": {
       "type": "boolean",
       "description": "True when the gateway is healthy"
      },
      "mcp": {
       "type": "string",
       "description": "MCP endpoint URL"
      },
      "ping": {
       "type": "string",
       "const": "pong"
      },
      "domain": {
       "type": "string",
       "description": "Public domain of the gateway"
      },
      "status": {
       "type": "string",
       "description": "Service status string"
      },
      "service": {
       "type": "string",
       "description": "Service identifier"
      },
      "timestamp": {
       "type": "number",
       "description": "Server timestamp (ms)"
      },
      "supportedModels": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "LLM models available through this gateway"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-558686-xyz-x402-ping-51b10511/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt.558686.xyz](https://www.zero.xyz/host/gpt.558686.xyz/llms.txt)