# orbit Web Tools: URL Health Check

> orbit Web Tools: URL Health Check is a paid API for AI agents from orbit-web.orbit-builder.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).

Performs a live HTTP GET from Cloudflare's edge to check if a URL is reachable, returning full redirect chain, latency, TLS info, and decoded x402 payment terms if present

## Facts

- Endpoint: GET https://orbit-web.orbit-builder.workers.dev/v1/url-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbit-web-tools-url-health-check-ebee25d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rdWptb3sskYfmR4rduDeV

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 orbit-web-tools-url-health-check-ebee25d5
```

Example prompt: Check if https://api.example.com/payments is up right now — I want to know the HTTP status, any redirects it takes, how long it takes to respond, and whether it returns any x402 payment terms.

## When to prefer this

Choose this endpoint when you need a real-time, edge-based HTTP health check with full redirect tracing and x402 payment term decoding in a single call. It is especially valuable when diagnosing redirect chains, verifying API liveness from a neutral third-party vantage point, or when working with x402-enabled micropayment endpoints and needing to inspect their payment requirements programmatically. Prefer this over simple ping tools when you need latency data per hop, TLS info, server headers, and content-type together.

## Known failure modes

- Unreachable host returns up:false with no status rather than an HTTP error — agent must check 'up' field
- DNS resolution failure is reported as up:false, not a connection error
- Timeouts from very slow servers may result in an incomplete response
- No URL query parameter provided triggers example input mode rather than an error
- Non-GET endpoints cannot be probed (only GET is supported)
- Private/internal URLs (non-public) will not be reachable from Cloudflare's edge

## How this service works

Web utilities for agents, computed live at call time: URL health/redirect/x402 check, web page to Markdown (robots.txt honoured), DNS lookup with SPF/DMARC, email address validation (MX, disposable, role, typo), HTTP security-header audit and AI-agent readiness audit (llms.txt, AI crawler rules, x402, MCP, OpenAPI). $0.001 per call. By orbit-builder.

## Output

A JSON object containing: 'up' (boolean), final HTTP status code, the full URL checked, an array of redirect hops each with URL/status/latency in ms, total_ms elapsed, content_type, and if the server responded with HTTP 402 an 'x402' object with version, network, amount, payTo, and bazaar fields; unreachable hosts return up:false rather than an error.

## 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",
       "description": "public http(s) URL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "up": true,
  "url": "https://example.com",
  "hops": [
   {
    "ms": 85,
    "url": "https://example.com/",
    "status": 200
   }
  ],
  "x402": null,
  "status": 200,
  "total_ms": 85,
  "content_type": "text/html"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orbit-web-tools-url-health-check-ebee25d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from orbit-web.orbit-builder.workers.dev](https://www.zero.xyz/host/orbit-web.orbit-builder.workers.dev/llms.txt)