# Site Intel – Link Rel Canonical Extractor

> Site Intel – Link Rel Canonical Extractor is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-03).

Fetches a web page and returns all rel="canonical" link/anchor elements with their resolved absolute URLs and a count, for duplicate-content and canonicalisation analysis.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/link-rel/canonical?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/site-intel-link-rel-canonical-extractor-c78df807
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zdg4lN3Lg_J_GVSwzKabL

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability site-intel-link-rel-canonical-extractor-c78df807
```

Example prompt: Check what rel="canonical" links are set on https://example.com/blog/my-post and tell me whether they resolve correctly — I want to make sure there's no duplicate-content issue.

## When to prefer this

Choose this endpoint when you specifically need to extract and validate rel="canonical" link elements from a page for SEO auditing, duplicate-content checks, or canonicalisation verification. It is purpose-built for canonical link extraction rather than generic HTML scraping, and resolves all hrefs to absolute URLs automatically. Prefer it over full-page scrapers when only canonical metadata is needed at low cost ($0.01/call).

## Known failure modes

- Page URL is unreachable or returns a non-200 status — extraction fails with no results
- Page has no canonical tags — returns an empty list with count 0
- Relative URLs that cannot be resolved due to missing base URL context — may return partially resolved results
- Rate limiting or payment failure via x402 — call is rejected before fetching
- Malformed HTML prevents proper link element parsing — may return incomplete results

## How this service works

The rel="canonical" links of a page: every matching <link>/<a> with href, resolved to absolute URLs, with a count. Duplicate-content and canonicalisation checks. $0.01 per page.

## Output

Returns every <link rel="canonical"> and <a rel="canonical"> element found on the fetched page, with each href resolved to its absolute URL and a total count of matching elements. Useful for confirming correct canonical setup or identifying duplicate/conflicting canonical declarations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/site-intel-link-rel-canonical-extractor-c78df807/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site.intel.rallylive.ca](https://www.zero.xyz/host/site.intel.rallylive.ca/llms.txt)