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URL Unshorten & Redirect Chain Checker
x402
URL Unshorten & Redirect Chain Checker is a paid API for AI agents from sdn-screen-x402.sdnscreen.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).
Follows HTTP redirects for a given URL and returns the full redirect chain, final destination URL, and risk flags for $0.01 USDC per call.
Price / call$0.01
Success—
StatusUnknown
How this service works
Six keyless pay-per-call tools for AI agents: OFAC SDN crypto-wallet screen, live DNS records lookup, SPF/DMARC/DKIM email-auth check, domain age/registrar (RDAP), email address MX verify and URL unshorten/redirect check. $0.01 per call: USDC on Base over x402, or USDC on Tempo over MPP. Also a remote MCP server at /mcp (x402).
Output
Returns a JSON object containing: the original input URL, the final resolved URL and host, HTTP status of the final page, number of redirects followed, a full chain array showing each hop's URL, status code, and Location header, a list of heuristic risk flags (e.g. IP-address host, excessive hops, known shortener chains), an overall risk rating (low/medium/high), a checkedAt timestamp, and any error message. Note: follows HTTP redirects only, not JavaScript or meta-refresh; page bodies are never read.
Example use cases
Phishing link triage for security team
“Before we forward this suspicious link to our analysts, can you trace where https://t.co/aB3xYzQ goes through all its redirects and tell me the final destination and risk level?”
Newsletter URL safety check
“We received a newsletter with this link: https://ow.ly/Dk5t50R9abc — can you unshorten it and confirm the final URL and whether any redirect hops look suspicious?”
AI agent preflight before visiting a URL
“Before I open https://cutt.ly/mXq7Kz in the browser, expand all the redirects and tell me the final host, how many hops there are, and the overall risk rating.”
Technical details
Endpoint
GEThttps://sdn-screen-x402.sdnscreen.workers.dev/v1/url-unshorten?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve a shortened or opaque URL to its true destination before acting on it, especially in security-sensitive workflows, automated agent pipelines, or compliance checks. Prefer this over manual browser inspection when you need a structured, machine-readable redirect chain with risk flags. Ideal for AI agent preflight checks before visiting URLs, for phishing triage, or for newsletter/email link auditing. At $0.01 USDC per call with no API key required, it is well-suited for pay-per-use agentic workflows via x402 or MPP.
Side effects
- Private or loopback host URLs are refused with an error
- Malformed or non-HTTP/HTTPS URLs rejected
- DNS resolution failures for the target host
- Connection timeouts on slow or unresponsive hosts
- URLs longer than 2048 characters are rejected
- Risk flags are heuristic only — not a malware/phishing reputation verdict
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Follows HTTP redirects only (not JavaScript/meta refresh); page bodies are never read. Flags are local heuristics, not a malware/phishing reputation verdict.",
"risk": "low",
"chain": [
{
"url": "http://github.com/",
"status": 301,
"location": "https://github.com/"
},
{
"url": "https://github.com/",
"status": 200,
"location": null
}
],
"error": null,
"flags": [],
"input": "http://github.com",
"finalUrl": "https://github.com/",
"checkedAt": "2026-10-12T17:50:00.000Z",
"finalHost": "github.com",
"redirects": 1,
"finalStatus": 200
}
}Tags
x402
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