# SiteSignal Link Preview

> SiteSignal Link Preview is a paid API for AI agents from phases-prot-shine-royal.trycloudflare.com, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Fetches and extracts a structured link preview (title, description, canonical URL, and social image) from a public webpage URL.

## Facts

- Endpoint: GET https://phases-prot-shine-royal.trycloudflare.com/x402/link-preview
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-link-preview-19e6dcf6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IQpifv2tGPWs8S4kG0EL3

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 sitesignal-link-preview-19e6dcf6
```

Example prompt: Can you grab the link preview for https://openai.com — I need the title, description, canonical URL, and any social image it references?

## When to prefer this

Choose this endpoint when you need a fast, structured link preview (title, description, canonical URL, og:image) for a single public URL without building your own scraper. It is ideal for enriching bookmarks, generating share cards, populating newsletter preview blocks, or validating what metadata a page exposes. Prefer this over a full web scraper when you only need surface-level metadata and not the full page content.

## Known failure modes

- URL is not publicly accessible or returns a non-200 status — preview data will be missing or empty
- Webpage has no open graph or meta tags — title/description/image fields may be null
- URL parameter missing or malformed — schema validation error returned
- Cloudflare tunnel downtime or network timeout — service unavailable error
- Paywalled or bot-blocked pages may return incomplete or no metadata
- Very large or slow-loading pages may time out before metadata is extracted

## How this service works

Extract a bounded public webpage link preview with title, description, canonical URL, and referenced social image.

## Output

Returns a structured JSON object containing the webpage's title, meta description, canonical URL, and referenced social/og:image URL — everything needed to render a rich link preview card.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      }
     }
    }
   },
   "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/sitesignal-link-preview-19e6dcf6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phases-prot-shine-royal.trycloudflare.com](https://www.zero.xyz/host/phases-prot-shine-royal.trycloudflare.com/llms.txt)