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URL Normalizer (OpenVerbs)
x402
URL Normalizer (OpenVerbs) is a paid API for AI agents from url.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Canonicalizes a URL by lowercasing the host, resolving dot-segments, dropping default ports, sorting query parameters, and optionally removing fragments or trailing slashes.
Price / call$0.002
Success—
StatusUnknown
How this service works
Canonicalize a URL: WHATWG parsing already lowercases the host, resolves dot-segments and drops default ports; on top of that, query parameters are sorted by default and you can optionally drop the fragment or a trailing slash. Returns the normalized URL and whether it changed.
Output
Returns the normalized URL string after applying WHATWG parsing (hostname lowercased, dot-segments resolved, default ports dropped) plus any requested transformations (sorted query params, removed fragment, removed trailing slash), along with a boolean indicating whether the URL actually changed from the input.
Example use cases
Deduplicating crawled web URLs
“I'm storing crawled URLs in a database and want to avoid duplicates caused by different capitalizations or query param ordering — can you normalize 'https://Example.COM/page?b=2&a=1#top' by lowercasing the host, sorting query params, and removing the fragment?”
Canonical URL for cache key generation
“Before I cache this API response, I need a canonical form of the URL 'https://api.example.com/v1/../v1/search?z=last&a=first' — normalize it with query parameters sorted and trailing slash removed so I get a consistent cache key.”
Cleaning user-submitted links
“A user submitted the URL 'HTTPS://MySite.com/about/?ref=header#faq' — can you normalize it to a clean canonical form, stripping the fragment and trailing slash so I can store it consistently?”
Technical details
Endpoint
POSThttps://url.openverbs.com/v1/normalizeWhen to prefer
Choose this endpoint when you need reliable, standards-compliant URL canonicalization — especially when you want WHATWG-spec parsing (not just regex substitution) combined with query parameter sorting and optional fragment/trailing-slash removal. Prefer it over DIY normalization when consistency across environments matters, or when you need a trustworthy signal about whether a URL actually changed after normalization.
Side effects
- Invalid or non-absolute URL input returns an error
- URL exceeding 8192 characters is rejected
- Malformed JSON body returns a 400-level error
- Payment not included or insufficient results in a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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