# SiteSignal URL Evidence

> SiteSignal URL Evidence is a paid API for AI agents from obtain-incentive-exceptions-speakers.trycloudflare.com, paid per call via x402, $0.02/call, status down (last checked 2026-09-16).

Capture a reproducible public-URL evidence snapshot including HTTP status, redirect chain, content hash, and optional text-presence verification.

## Facts

- Endpoint: GET https://obtain-incentive-exceptions-speakers.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-evidence-65e98b07
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RWFMJl_UqKcTlcQngO_bv

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-evidence-65e98b07
```

Example prompt: Take a SiteSignal URL evidence snapshot of https://example.com/pricing right now and check whether the text 'Enterprise plan' is present on the page — I need a reproducible status, content hash, and text-presence result for my audit.

## When to prefer this

Choose this endpoint when you need a bounded, reproducible, auditable snapshot of a public URL's current state — especially for compliance evidence, content verification, or monitoring a specific page for text presence. Prefer this over a generic HTTP fetch when you need the content hash for tamper detection or need to assert text presence as part of an automated check.

## Known failure modes

- URL is unreachable or returns a non-2xx status — snapshot still captured but may indicate page is down
- Expected text not found — returns negative text-presence result without error
- URL format invalid — schema validation error on the url field
- Target URL requires authentication — only publicly accessible responses can be snapshotted
- Rate limit or payment failure — 402 payment required or quota exceeded

## How this service works

Capture a bounded, reproducible public-URL evidence snapshot with status, redirects, content hash, and optional text-presence check.

## Output

Returns an evidence snapshot containing: HTTP status code, redirect chain, content hash of the response body, and a boolean/match result for the optional expected text presence check. All results are bounded and reproducible for a single public GET request.

## 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-evidence-65e98b07/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from obtain-incentive-exceptions-speakers.trycloudflare.com](https://www.zero.xyz/host/obtain-incentive-exceptions-speakers.trycloudflare.com/llms.txt)