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URL Canonical Compare
x402
URL Canonical Compare is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Normalizes and compares two URLs across scheme, host, port, path, and query components to determine if they are canonically equivalent.
Price / call$0.001
Success—
StatusUnknown
How this service works
URL Canonical Compare: URL Canonical Compare compares URLs after scheme, host, port, path, and query normalization from bounded caller-supplied values without an external provider. Call URL Canonical Compare before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for URL Canonical Compare as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, sta…
Output
Returns a deterministic JSON object containing the normalized forms of both input URLs, the computed canonical equivalence finding (match or mismatch), and an explicit pass or advisory status — versioned for reproducibility.
Example use cases
Redirect safety check before following
“Before my agent follows this redirect, can you check if 'https://shop.example.com/products/widget' and 'http://shop.example.com:443/products/widget?ref=home' are canonically the same URL so I know it's safe to accept?”
Cache deduplication for identical resources
“I'm about to cache a response — can you compare 'https://api.service.io/data?sort=asc&limit=10' and 'https://api.service.io/data?limit=10&sort=asc' to see if they're canonically equivalent so I don't store a duplicate?”
Retry URL validation for idempotent requests
“My agent is about to retry a failed request — please check whether 'http://backend.internal/v1/submit' and 'http://backend.internal:80/v1/submit/' normalize to the same canonical URL before I fire the retry.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/url-canonical-compareWhen to prefer
Use this endpoint when you need a deterministic, server-side canonical comparison of two caller-supplied URLs before accepting a web response, caching a resource, following a redirect, or retrying a request — especially when you cannot trust local normalization logic or need an auditable, versioned JSON record of the comparison result.
Side effects
- Input URL exceeds 8192 character limit — request rejected
- Malformed or unparseable URL provided as left or right — normalization error returned
- Network timeout or service unavailability — HTTP 5xx error
- Missing required 'left' or 'right' fields — validation error returned
- Payment failure via x402 — 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| left | string | Left supplied to URL Canonical Compare; used only for this bounded calculation and processed in memory without retention. |
| right | string | Right supplied to URL Canonical Compare; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"left": "https://example.com/a",
"right": "https://example.com/a",
"matched": true
},
"schema": "delx/util-url-canonical-compare/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "936c1c7a0d9ac76bbae6665567c79ff085c468589aa089757cfb54f94c077a6e",
"external_calls": 0
},
"operation": "web_reliability:url_canonical_compare"
}
}Tags
x402
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