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Mekler AI URL Reachability Check
x402
Mekler AI URL Reachability Check is a paid API for AI agents from api.mekler.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-28).
Inspects a public URL for HTTP status, redirect chain, content type, and reported size using HEAD with bounded GET fallback, without downloading the full resource.
Price / call$0.003
Success—
StatusUnknown
How this service works
Inspect a public URL for HTTP status, redirect chain, content type and reported size before downloading it. Uses HEAD with bounded GET fallback, DNS-pinned public-address checks and up to five redirects. Reports server-declared sizes separately from observed sample bytes. No full download, content safety verdict or uptime guarantee.
Output
Returns a JSON object with the outcome (reachable/unreachable), final URL after redirects, full redirect chain with per-hop method and status, HTTP status code, content type, server-declared size in bytes, observed sample bytes, size basis (server_header vs observed), whether the sample was truncated, timestamp of observation, and a list of diagnostic limitations.
Example use cases
Pre-flight check before file download
“Before I download this ZIP file, can you check whether the link is live, what HTTP status it returns, if it redirects anywhere, and what size the server is reporting? https://releases.example.com/v2.1.0/package.zip”
Validate user-submitted link in pipeline
“A user just submitted this URL to our form — can you confirm it's actually reachable, not a redirect loop, and returns HTML content? https://user-submitted-blog.example.com/article/42”
Debug a broken redirect chain
“This URL used to work but something seems off — can you trace all the redirects and tell me the final destination URL and HTTP status at each hop? https://go.example.com/promo2024”
Technical details
Endpoint
POSThttps://api.mekler.ai/v1/web/urls/check-reachability?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, non-destructive HTTP diagnostics on a URL — especially to confirm reachability, trace redirects, or get content-type and size metadata before committing to a full download. Prefer it over general web scrapers when you do not need page content, and over uptime monitors when you need a one-shot diagnostic rather than continuous polling. Best suited for pre-flight checks in data pipelines, link validation in user-submitted content, or debugging redirect chains.
Side effects
- URL points to a private/non-public IP address — blocked by DNS pinning checks
- Redirect chain exceeds five hops — returns partial chain with error
- URL scheme is not HTTP or HTTPS — rejected at input validation
- Server does not respond within timeout — returns unreachable outcome
- URL is syntactically invalid or exceeds 2048 characters — validation error
- Server returns an HTTP error (4xx/5xx) — reported as a completed diagnostic, not a service failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| request_id | string |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "ok",
"outcome": "reachable",
"final_url": "https://mekler.ai/",
"redirects": [
{
"url": "https://mekler.ai/",
"method": "HEAD",
"status": 200
}
],
"size_basis": "server_header",
"http_status": 200,
"limitations": [
"HEAD metadata and range samples do not verify full content or total download size.",
"Only public HTTP(S) ports80/443, up tofive redirects; robots restrictions apply.",
"An observed HTTP error or redirect loop is a completed diagnostic, not guaranteed future availability."
],
"observed_at": "2026-10-18T00:00:00Z",
"content_type": "text/html",
"requested_url": "https://mekler.ai/",
"sample_truncated": false,
"reported_size_bytes": 1024,
"sample_bytes_observed": 0
}
}Tags
x402
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