Bulk URL Status & Redirect Checker

Check a supplied URL list for HTTP status codes and redirect chains. No crawling, browser or JavaScript execution.

{"urls":["https://example.com","http://github.com","https://example.com/missing-status-probe"]}

Each processed distinct canonical URL produces one row with url, finalUrl, httpStatus, method, redirects, elapsedMs and reasonCode. finalUrl is the last URL actually requested, not a claim that an incomplete redirect chain finished. Redirect entries contain the source URL, status and resolved destination.

Billing

Configured price: $0.001 per answered URL. One url-status-checked event per answered URL, including observed 404/410 responses. Partial redirect chains do not bill.

reasonCode	Meaning	Charged
checked	Final response was 2xx	yes
not_found	Final response was 404 or 410	yes
blocked	Final response was 401, 403 or 429	no
http_error	Another non-redirect status, including 5xx	no
unreachable	DNS, connection, TLS or deadline failure	no
invalid_url	Unsupported or malformed submitted URL	no
unsafe_target	A resolved address was not public unicast	no
invalid_redirect	Missing, malformed or unsupported redirect destination	no
redirect_loop	A canonical URL repeated in the chain	no
redirect_limit	More than five redirects needed	no

A 404/410 reports what this request received; it does not prove permanent removal. A 2xx is not proof the page has the expected content or works in a browser. Some bot walls return 200 and cannot be identified from headers alone.

Limits

• Up to 100 URLs per run, 8 at a time, so rows arrive in finish order, not input order; join on url. Each check has a 15-second total deadline including DNS and redirects; the worst-case batch takes about 3–4 minutes before platform overhead.
• HEAD requests; when HEAD answers any 4xx/5xx, the URL is asked again with GET and only that answer is reported (some servers answer HEAD 404 for a live page). Response bodies are not read. Headers are limited to 16 KiB. No retries, proxies, custom headers or authentication.
• Up to five redirects (301/302/303/307/308), with public-address checks on every hop. Connections are pinned to a validated DNS address and TLS certificate verification stays enabled. Only the first validated address is tried; another address might work when it fails.
• HTTP(S) on registrable hostnames, ports 80/443 only. IP literals, credentials, local names and DNS with any non-public address are refused. This conservative policy also rejects some special-purpose IPv6 ranges.
• URL parsing folds host case, default ports and dot segments; fragments are dropped. Paths and query strings remain distinct. First submitted spelling wins; different invalid strings remain separate rows.
• A charge cap stops new work. Up to seven other URLs may already be in flight and can return uncharged rows. Inputs not started are absent; join rows to inputs by url and resubmit only missing URLs.

The Actor contacts target websites and DNS infrastructure; do not put secrets in URL queries. Check only targets you are authorized to access.