# GXEON Command Seller API — Paid HTTPS Uptime Probe

> GXEON Command Seller API — Paid HTTPS Uptime Probe is a paid API for AI agents from gxeon-plugin-api-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).

Performs a paid HEAD request probe against a specified public HTTPS URL and returns uptime status, HTTP status code, and latency metrics.

## Facts

- Endpoint: GET https://gxeon-plugin-api-production.up.railway.app/api/v1/audit/paid?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gxeon-command-seller-api-paid-https-uptime-probe-46519625
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v1CD2YMeuCwxIq1GR9fh6

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 gxeon-command-seller-api-paid-https-uptime-probe-46519625
```

Example prompt: Can you probe https://api.stripe.com/ with a HEAD check and tell me if it's up, what status code it returns, and how fast it responds?

## When to prefer this

Choose this endpoint when you need a quick, lightweight uptime and latency probe of a public HTTPS endpoint using a HEAD request, especially in paid/premium contexts where reliability of the probe itself matters. Prefer this over free probes when you need guaranteed execution backed by x402 micropayment and want structured JSON output including latency, status code, and redirect tracking.

## Known failure modes

- Private, reserved, or literal IP addresses in the URL are rejected
- Non-HTTPS or invalid URL formats cause validation errors
- Target host is unreachable or DNS fails — may return timeout or connection error
- Missing required 'url' query parameter returns a 400-class error
- Target server returns unexpected or non-standard HTTP responses

## How this service works

XPeX Systems AI x402-payable HEAD uptime probe for approved public HTTPS endpoints.

## Output

A JSON object containing the probe tier ('PAID'), the HTTP method used ('HEAD'), the target URL, the timestamp of the check (ISO 8601), response latency in milliseconds, the HTTP status code returned, and whether any redirects were followed.

## 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",
       "format": "uri",
       "description": "HTTPS URL using a public DNS hostname, no private, reserved or literal IPs"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": "PAID",
  "method": "HEAD",
  "target": "https://www.cloudflare.com/",
  "checkedAt": "2026-10-14T20:00:00.000Z",
  "latencyMs": 110,
  "statusCode": 200,
  "redirectsFollowed": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gxeon-command-seller-api-paid-https-uptime-probe-46519625/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gxeon-plugin-api-production.up.railway.app](https://www.zero.xyz/host/gxeon-plugin-api-production.up.railway.app/llms.txt)