# Strale URL Uptime Checker

> Strale URL Uptime Checker is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-10-10, last successful call 2026-06-25).

Checks whether a given URL is up or down, returning HTTP status code, latency, redirect chain, TLS status, and server headers.

## Facts

- Endpoint: GET https://api.strale.io/x402/uptime-check?utm_source=zero.xyz
- Price: $0.0216/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Last successful call: 2026-06-25
- Success rate: 75% of calls made through Zero
- Rating: 1.3 / 5 from 1 review
- Activations on Zero: 9
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-strale-io-2d1d9582
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_meOuBz1P56-LI-y8GAtAM

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 api-strale-io-2d1d9582
```

Example prompt: Can you check if https://example.com is currently up and responding? Use a GET request and tell me the status code, how long it took, whether it redirects, and if TLS is valid.

## When to prefer this

Use this endpoint when you need a quick, real-time check of whether a specific URL is live, including HTTP status, latency, TLS health, and redirect behavior — especially useful in automation workflows, deployment checks, or alerting pipelines where you need structured diagnostic data rather than just a ping.

## Known failure modes

- URL is unreachable or times out — returns error or timeout status
- Invalid URL format — schema validation error on input
- Non-HTTP URL type provided — schema requires type='http'
- Unsupported HTTP method — only GET, HEAD, DELETE allowed
- Target server blocks automated requests — may return 403 or connection refused

## How this service works

Check if a URL is up or down. Returns status code, latency, redirect info, TLS status, and server headers.

## Output

Returns the HTTP status code, response latency in milliseconds, redirect chain information, TLS/SSL certificate status, and raw server response headers for the probed URL.

## Example request

```json
{
 "url": "https://www.google.com",
 "method": "GET",
 "timeout_ms": 5000
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string"
  },
  "method": {
   "type": "string"
  },
  "timeout_ms": {
   "type": "integer"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "status": {
  "type": "string"
 },
 "latency_ms": {
  "type": "integer"
 },
 "redirected": {
  "type": "boolean"
 },
 "status_code": {
  "type": "integer"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-strale-io-2d1d9582/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)