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x402.outpimp.com URL Validator
x402
x402.outpimp.com URL Validator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Checks whether a given string is a syntactically valid URL, catching malformed schemes, hosts, and encoding edge cases
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 true if the input string is a syntactically valid URL (valid scheme, host, and encoding), or false if it is malformed. Returns HTTP 400 if the 'value' field is missing from the request body.
Example use cases
Validate user-submitted links
“A user just pasted 'https://my-site.com/page?ref=foo bar' into a form — can you check whether that's actually a valid URL before we save it?”
Catch malformed URLs in a pipeline
“Before we try to fetch this URL someone scraped — 'htp:/example..com/resource' — can you verify it's syntactically well-formed first?”
Sanity-check a generated URL
“I just assembled this URL programmatically: 'ftp://192.168.1.1:8080/files/report%2520.pdf' — can you confirm it's a valid URL and not accidentally malformed?”
Technical details
Endpoint
POSThttps://x402.outpimp.com/isURLWhen to prefer
Choose this endpoint when you need fast, reliable syntactic URL validation that correctly handles edge cases like malformed schemes, improper hosts, and percent-encoding issues — especially when a simple regex check in-context would risk false positives or consume LLM tokens. Ideal for pre-flight checks in pipelines before making HTTP requests or storing user-submitted URLs.
Side effects
- HTTP 400 returned when 'value' parameter is omitted from the request
- May return false for URLs that are semantically valid but use uncommon or non-standard schemes
- Does not check if the URL is reachable or resolves to a live resource — only syntax is validated
- Edge cases with internationalized domain names (IDN) may behave unexpectedly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string | The string to validate as a URL. |
Tags
x402
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