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ScrapeCheck Redirect Verification
x402
ScrapeCheck Redirect Verification is a paid API for AI agents from scrapecheck.fly.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Walks the full HTTP redirect chain of a URL twice with SSRF checks, returning the final destination URL, first status code, and hop count — or 'unverifiable' if the chain is unstable or loops
Price / call$0.002
Success—
StatusUnknown
How this service works
Redirect tier (deterministic, no LLM): verifies where a public URL actually leads: final URL (byte-exact), first response status, and hop count of the HTTP chain, walked twice with per-hop SSRF checks. Use it to confirm a link or a moved page points where it claims. Loops and unstable chains return unverifiable, never a guess. First 100 checks per client are free: resend with header X-Use-Free-Allowance: yes and no payment to use them.
Output
Returns the byte-exact final destination URL, the HTTP status code from the first response in the chain, the number of hops traversed, and a verifiability verdict. If the chain loops or behaves inconsistently across two walks, the endpoint returns 'unverifiable' rather than guessing.
Example use cases
Shortened link destination check
“I got this link in an email: https://t.co/abc123xyz — can you trace where it actually ends up and tell me if it reaches https://twitter.com/myhandle or something else entirely?”
Moved page redirect confirmation
“We updated our docs and set up a redirect from https://docs.oldsite.com/guide to https://docs.newsite.com/guide — can you confirm the redirect actually works and lands on the right URL?”
Redirect chain audit for security review
“Before we publish this affiliate link https://partner.example.com/track?id=99 in our newsletter, can you verify it redirects to https://shop.example.com/sale and tell me how many hops are in the chain?”
Technical details
Endpoint
POSThttps://scrapecheck.fly.dev/verify-redirectWhen to prefer
Choose this endpoint when you need to deterministically verify where a URL redirect chain lands without relying on LLM inference — especially when link integrity, security, or accuracy matters. Ideal for validating shortened URLs, confirming page migrations, auditing affiliate links, or checking whether a URL has been hijacked. Prefer over generic scraping endpoints because it walks the chain twice with SSRF protection and returns verifiable, byte-exact results or explicitly says 'unverifiable'.
Side effects
- Redirect loop detected — returns 'unverifiable' rather than a destination
- Chain behaves inconsistently across two traversals — returns 'unverifiable'
- URL is not publicly accessible or blocked by SSRF checks — request rejected
- Non-HTTPS or private/internal URLs rejected by SSRF filtering
- Payment not provided and free allowance exhausted — payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | public HTTPS URL |
| claim | object | see the route description; there is no asked field - this tier adjudicates exactly what it accepts |
Output
Schema · Response
{
"type": "json",
"example": {
"engine": "web_field_v1/0.2.0+2ae28205cac4",
"key_id": "k2",
"reasons": [
"the chain settles at the claimed final URL (byte-exact)",
"first response status is 301 as claimed",
"the chain has 1 redirect hop(s) as claimed"
],
"verdict": "pass",
"evidence": {
"lens_votes": {},
"refetched_at": "2026-08-28T00:00:00.000Z",
"refetch_excerpt": "301 https://scrapecheck.fly.dev/audit -> 200 https://scrapecheck.fly.dev/price-mismatch-checker",
"second_fetch_at": "2026-08-28T00:00:01.000Z"
},
"signature": "ed25519:…",
"check_type": "redirect_chain_v1",
"confidence": 0.95,
"verdict_id": "00000000-0000-0000-0000-000000000000",
"source_hash": "sha256:…",
"verifier_url": "https://scrapecheck.fly.dev"
}
}Tags
x402
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