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AgentShelf URL Protocol Checker
x402
AgentShelf URL Protocol Checker is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-11).
Determines whether a given URL uses HTTP or HTTPS protocol without fetching the URL's content
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs whether a URL is http or https. No fetch. Send JSON {"value":"https://example.com/a"}. Exact $0.007 USDC on Base. Try unpaid POST /v1/sandbox/check-url-web first.
Output
Returns an indication of whether the given URL uses the HTTP or HTTPS protocol, derived purely from parsing the URL string without making any network request to the target.
Example use cases
Security audit of collected links
“I have this link — http://oldsite.company.com/login — can you tell me if it's using HTTP or HTTPS so I can flag insecure ones?”
Pre-redirect protocol verification
“Before I redirect users to 'http://partner.example.org/callback', can you confirm whether that URL is HTTP or HTTPS?”
Content pipeline URL classification
“Check whether 'https://cdn.myapp.io/assets/logo.png' is HTTP or HTTPS — I need to know its protocol before adding it to my secure asset list.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-url-web?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, no-fetch protocol check on a URL string and are willing to pay $0.007 USDC per call. Prefer the free sandbox alternative (POST /v1/sandbox/check-url-web) when available. Choose this over full HTTP fetch endpoints when you only need the protocol (http vs https) and do not need the page content.
Side effects
- Empty or missing URL value returns a validation error
- URL string exceeds 20,000 character limit
- Malformed or non-URL string may return an error or unexpected result
- Service unavailable or payment failure (402) if USDC payment is not attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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