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Sindri URL Validation
x402
Sindri URL Validation is a paid API for AI agents from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-17).
Checks whether a given string is a syntactically valid URL, handling edge cases like malformed schemes, hosts, and encoding issues.
Price / call$0.01
Success—
StatusUnknown
How this service works
URL validation API. Checks whether a string is a syntactically valid URL, catching malformed schemes, hosts, and encoding edge cases a naive check misses. Returns true or false.
Output
Returns a boolean — true if the input string is a syntactically valid URL (well-formed scheme, host, encoding, etc.), or false if it is malformed or invalid in any way.
Example use cases
Sanitizing user-submitted links
“A user just submitted 'htps://example.com/page' as their website — can you check whether that's actually a valid URL before we accept it?”
Validating scraped URLs before crawling
“I've got a list of URLs scraped from a document and some look weird, like 'ftp://[::1:2:3' — can you check if that one is syntactically valid before I try to fetch it?”
Form input validation in agent workflow
“The form field has 'javascript:alert(1)' entered as the website URL — is that a valid URL according to proper URL syntax rules?”
Technical details
Endpoint
POSThttps://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/isURLWhen to prefer
Choose this endpoint when you need robust, edge-case-aware URL syntax validation that goes beyond simple regex — particularly for catching malformed schemes, invalid hosts, and encoding anomalies. Prefer it over naive client-side regex checks when input is untrusted or when downstream systems depend on URL correctness.
Side effects
- Missing or empty 'value' field may return an error or false
- Extremely long strings may time out or be rejected
- Ambiguous edge-case URLs (e.g. bare IP addresses) may return unexpected results
- Lambda cold-start latency on first invocation
- Payment failure via x402 protocol if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string | The string to validate as a URL. |
Tags
x402
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