# Agent Tools UK – Site Uptime & SSL Check

> Agent Tools UK – Site Uptime & SSL Check is a paid API for AI agents from agent-tools-production-e6aa.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).

Checks whether a website is currently up by returning HTTP status, response time, full redirect chain, and SSL certificate details including issuer and days until expiry.

## Facts

- Endpoint: GET https://agent-tools-production-e6aa.up.railway.app/v1/site-check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tools-uk-site-uptime-ssl-check-0e18fe73
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r3vKK9YHSN_Y8iKgT4gxj

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 agent-tools-uk-site-uptime-ssl-check-0e18fe73
```

Example prompt: Can you check if https://example.com is up right now — I need to know the HTTP status, how fast it's responding, the full redirect chain, and whether the SSL certificate is still valid and how many days it has left?

## When to prefer this

Choose this endpoint when you need a quick, real-time health snapshot of a single public website — particularly when SSL certificate monitoring or redirect chain diagnosis is required. It is ideal for agents that need to proactively warn users about expiring certificates or confirm a site is reachable before linking to it.

## Known failure modes

- 400 error returned for malformed, private, or non-public URLs (e.g. localhost, internal IPs)
- SSL details may be absent if the site uses plain HTTP
- Timeout or connection refused if the target server is completely unreachable
- Redirect chain may be incomplete if a redirect loop is detected

## How this service works

Check whether a website is up right now: HTTP status, response time in ms, full redirect chain, and the SSL certificate's validity, issuer and days until expiry. Use when monitoring a site, diagnosing a broken link, or warning that a certificate is about to expire. A site that is down still returns 200 with up:false and the error. Errors: 400 bad or private URL.

## Output

A JSON object with: a boolean 'up' field indicating if the site is reachable, the final HTTP status code, response time in milliseconds, the full redirect chain as an ordered list of URLs, and SSL certificate details including validity status, issuer name, and days until expiry. If the site is down, 'up' is false and an error message is included explaining the failure.

## 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": "Site to check (http/https)"
      }
     }
    }
   },
   "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/agent-tools-uk-site-uptime-ssl-check-0e18fe73/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-tools-production-e6aa.up.railway.app](https://www.zero.xyz/host/agent-tools-production-e6aa.up.railway.app/llms.txt)