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is-website-up
x402
is-website-up is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks if a given URL is currently online, returning HTTP status code, response time, final URL after redirects, server header, and TLS certificate expiry for HTTPS sites.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is this website up? Checks if a URL is online right now and answers up/down with the HTTP status code, response time in ms, final URL after redirects, server header and, when HTTPS, the TLS certificate expiry. Use it to check if a site is down, monitor availability, or confirm a page loads before scraping. $0.01 per check.
Output
Returns an up/down status flag, the HTTP status code returned by the server, response time in milliseconds, the final URL after any redirects, the server header value, and (for HTTPS URLs) the TLS certificate expiry date.
Example use cases
Pre-scrape reachability check
“Before you start pulling data from https://data.gov/opendata, can you confirm the page is actually up and responding right now?”
Incident triage for a downed site
“Users are reporting our site is down — can you quickly check if https://app.mycompany.com is actually unreachable and what HTTP status code it's returning?”
TLS certificate expiry alert
“Can you check https://checkout.mystore.com and tell me if the site is up and how long until the SSL certificate expires — I want to know if we're about to have an outage.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/is-it-upWhen to prefer
Use this endpoint when you need a real-time, single-shot check on whether a specific URL is reachable right now, especially when you also need TLS expiry, redirect chain resolution, response time, or server identity in the same call. Prefer it over full synthetic monitoring suites for lightweight, on-demand checks before scraping or as part of incident triage.
Side effects
- URL is completely unreachable or DNS does not resolve — returns down status with no HTTP code
- Malformed or missing URL input — likely a 400-level error from the API
- Request timeout if the target server is extremely slow — may return down with no status code
- Target server returns an unexpected response format — server header may be absent
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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