# URL Evidence Snapshot

> URL Evidence Snapshot is a paid API for AI agents from holder-victor-nova-mag.trycloudflare.com, paid per call via x402, $0.02/call, status down (last checked 2026-09-16).

Captures a bounded, reproducible public-URL evidence snapshot including HTTP status, redirects, content hash, and optional text-presence verification.

## Facts

- Endpoint: GET https://holder-victor-nova-mag.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/url-evidence-snapshot-722a1cb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qc4ARAt8L8LkmLO1gOkjn

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 url-evidence-snapshot-722a1cb2
```

Example prompt: Can you take an evidence snapshot of https://example.com/terms and check whether the text 'last updated 2024' appears on the page — I need the status code, content hash, and confirmation of text presence?

## When to prefer this

Use this endpoint when you need a reproducible, verifiable evidence record of a public URL's state — including status, redirect chain, content hash, and optional text presence — rather than just fetching raw content. Ideal for compliance verification, change detection baselines, or proving a page contained specific content at a given time.

## Known failure modes

- URL is unreachable or returns a network error — snapshot fails with connection error
- URL requires authentication — returns 401/403 status, no content hash
- Expected text not found — returns false for text presence check, not an error
- Invalid URL format — input validation error before request is made
- Timeout on slow-loading pages — bounded execution may cut off before full response

## How this service works

Verifies and returns evidence for a URL on request.

## Output

Returns a structured evidence object including HTTP status code, any redirect hops encountered, a content hash of the response body, and a boolean or match result indicating whether the optional expected text was found on the page.

## 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/url-evidence-snapshot-722a1cb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from holder-victor-nova-mag.trycloudflare.com](https://www.zero.xyz/host/holder-victor-nova-mag.trycloudflare.com/llms.txt)