# Lordevo Page Change Check

> Lordevo Page Change Check is a paid API for AI agents from shop.lordevo.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Fetches a public webpage, returns a SHA-256 hash and clean text of its main content, and optionally detects changes and diffs added/removed lines against a previous snapshot.

## Facts

- Endpoint: GET https://shop.lordevo.com/api/quick/page-diff?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lordevo-page-change-check-7029b7a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7Pr6sKS8t-MzX1KTNWu_x

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 lordevo-page-change-check-7029b7a0
```

Example prompt: Check if https://example.com/pricing has changed since my last snapshot — compare it against this previous hash: a3f1...b2c9 and tell me which lines were added or removed.

## When to prefer this

Choose this endpoint when you need lightweight, recurring page change detection without running a full browser or crawler. It is ideal for monitoring specific public pages (documentation, pricing, news, status pages) where you want a stable content hash for comparison across polling intervals. Prefer it over full SEO audit endpoints when you only care about content changes, not technical SEO signals. It is well-suited for agents that poll on a schedule and need to decide whether to take action only when content actually changes.

## Known failure modes

- URL is unreachable or returns non-200 status — endpoint may still return hash/text of error page or report failure
- Invalid previous_hash format (not 64 hex chars) causes schema validation error
- Page has no extractable main text — returns empty or minimal text with valid hash
- Very long previous_text may be truncated at 200,000 character limit
- Private/intranet URLs return no content or access denied
- Rate limiting or payment failures result in 402 or 429 responses

## How this service works

Page change check: content hash, clean text and line diff: Fetches one public page and returns a SHA-256 hash of its main text plus the clean text; if you send the previous hash or text it also says changed yes/no and, with previous text, lists added and removed lines. Input: url, optional previous_

## Output

Returns a JSON object containing the canonical URL fetched, HTTP status code, a SHA-256 hash of the page's extracted main text, the clean text itself, a boolean `changed` flag (null if no previous hash/text was supplied), a `compared_with` field indicating what was compared against, and optionally a `diff` object listing added and removed lines. Also includes `text_truncated` if the text was cut off.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Public http(s) URL or bare domain, e.g. https://example.com"
      },
      "previous_hash": {
       "type": "string",
       "pattern": "^[a-fA-F0-9]{64}$",
       "description": "content_sha256 from your previous call"
      },
      "previous_text": {
       "type": "string",
       "maxLength": 200000,
       "description": "text from your previous call (gives the changed lines; POST for long text)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "tool",
      "url",
      "content_sha256",
      "text"
     ],
     "properties": {
      "url": {
       "type": "string"
      },
      "diff": {
       "type": [
        "object",
        "null"
       ]
      },
      "text": {
       "type": "string"
      },
      "tool": {
       "type": "string"
      },
      "status": {
       "type": "integer"
      },
      "changed": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "compared_with": {
       "type": [
        "string",
        "null"
       ]
      },
      "content_sha256": {
       "type": "string"
      },
      "text_truncated": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lordevo-page-change-check-7029b7a0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shop.lordevo.com](https://www.zero.xyz/host/shop.lordevo.com/llms.txt)