# Creator Desk Page Evidence Checker

> Creator Desk Page Evidence Checker is a paid API for AI agents from creator-desk-x402-isolated.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Checks whether specified text strings are present on a given public HTTPS webpage and returns occurrence counts and surrounding context snippets.

## Facts

- Endpoint: POST https://creator-desk-x402-isolated.onrender.com/v1/web/evidence?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/creator-desk-page-evidence-checker-3112ebc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ViK8EiPzPbVcN4PXQjEjM

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 creator-desk-page-evidence-checker-3112ebc7 -d '<json body>'
```

Example prompt: Can you check whether the page at https://example.com/about mentions the phrase 'certified organic' and also whether it contains 'money-back guarantee'?

## When to prefer this

Use this endpoint when you need a lightweight, verifiable, source-text check of whether specific phrases or strings appear on a public webpage — particularly for compliance checks, claim verification, content auditing, or monitoring. It is ideal when you have exact or near-exact text to look for rather than semantic meaning. Prefer this over general web scraping when you only need presence/absence and context snippets rather than full page extraction, and when you need a content fingerprint for auditability.

## Known failure modes

- Non-HTTPS or non-HTML URLs will fail or return unexpected results
- Pages behind authentication or paywalls will not be accessible
- JavaScript-rendered content may not appear in the inspected source HTML
- Very large pages may have body bytes capped, potentially missing late-occurring text
- Redirects are followed but the final URL is reported, which may differ from input
- Rate limiting or server-side blocking of the crawler IP may cause HTTP errors
- Malformed or unreachable URLs will produce HTTP error status in the response

## How this service works

Machine-callable x402-paid utilities for autonomous agents.

## Output

A JSON object with per-check results including: a boolean `present` flag, the `occurrence_count` of how many times the text was found, up to a handful of `contexts` (surrounding text snippets), and whether the count was capped. Also includes HTTP metadata (status code, latency, content type), the final resolved URL, a SHA-256 body fingerprint, a timestamp, and a scope disclaimer clarifying this is source-text presence only (not factual truth or semantic equivalence).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "description": "Public HTTPS HTML page to inspect."
  },
  "checks": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "id",
     "text"
    ],
    "properties": {
     "id": {
      "type": "string",
      "pattern": "^[A-Za-z0-9._:-]{1,64}$"
     },
     "text": {
      "type": "string",
      "maxLength": 500,
      "minLength": 1
     }
    },
    "additionalProperties": false
   },
   "maxItems": 20,
   "minItems": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "http": {
   "status": 200,
   "latency_ms": 100,
   "status_text": "OK",
   "content_type": "text/html; charset=UTF-8"
  },
  "scope": "Source-page text presence only. This does not establish factual truth, semantic equivalence, endorsement, or current real-world validity.",
  "checks": [
   {
    "id": "example-heading",
    "text": "Example Domain",
    "present": true,
    "contexts": [
     "Example Domain This domain is for use in illustrative examples"
    ],
    "count_capped": false,
    "occurrence_count": 1
   },
   {
    "id": "illustrative-use",
    "text": "illustrative examples",
    "present": true,
    "contexts": [
     "This domain is for use in illustrative examples in documents"
    ],
    "count_capped": false,
    "occurrence_count": 1
   }
  ],
  "version": "1.0.0",
  "final_url": "https://example.com/",
  "checked_at": "2026-09-25T00:00:00.000Z",
  "product_id": "creator_desk_page_evidence_checker",
  "matched_count": 2,
  "requested_url": "https://example.com/",
  "unmatched_count": 0,
  "body_fingerprint": {
   "sha256": "0000000000000000000000000000000000000000000000000000000000000000",
   "bytes_read": 1256
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/creator-desk-page-evidence-checker-3112ebc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from creator-desk-x402-isolated.onrender.com](https://www.zero.xyz/host/creator-desk-x402-isolated.onrender.com/llms.txt)