# SiteSignal URL & Webpage Evidence

> SiteSignal URL & Webpage Evidence is a paid API for AI agents from phases-prot-shine-royal.trycloudflare.com, paid per call via x402, $0.02/call, status down (last checked 2026-09-16).

Captures a bounded, reproducible snapshot of a public webpage's HTTP status, redirects, content hash, and optionally verifies whether specific text is present on the page.

## Facts

- Endpoint: GET https://phases-prot-shine-royal.trycloudflare.com/x402/url-evidence
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-url-webpage-evidence-eaf18ac4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__dyn0sZhgvSOtbAGRfvAI

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-url-webpage-evidence-eaf18ac4
```

Example prompt: Can you check whether https://www.example.com/terms still contains the phrase 'liability is limited' and give me a snapshot of its HTTP status and content hash?

## When to prefer this

Choose this endpoint when you need a bounded, reproducible, single-shot verification of a public webpage's availability, content integrity, or text presence — especially for monitoring, compliance auditing, or research scenarios where you want a content hash as an immutable reference. It is better than a full crawler when you only need one page and want lightweight, fast evidence without persistent state.

## Known failure modes

- URL is unreachable or returns a network error — endpoint reports connection failure
- Target page requires authentication — returns a non-200 status with no body content
- URL format is invalid — schema validation rejects the request before any fetch
- Page returns non-text content (e.g. binary file) — content hash may be present but text search is inapplicable
- Cloudflare tunnel instability causing intermittent 5xx errors from the proxy layer

## How this service works

Verify a public webpage with a bounded, reproducible snapshot of website status, redirects, content hash, and optional text-presence evidence for monitoring and research.

## Output

Returns a structured snapshot including the final HTTP status code, any redirect hops encountered, a content hash of the page body, and (if expectedText was supplied) a boolean indicating whether that text was found on the page, along with case-sensitivity details.

## 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"
      },
      "expectedText": {
       "type": "string",
       "maxLength": 500
      },
      "caseSensitive": {
       "type": "boolean",
       "default": false
      }
     }
    }
   },
   "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-url-webpage-evidence-eaf18ac4/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)