# API Changelog Monitor — Catch Breaking Changes

**Use case:** 

Monitor API documentation and changelogs for breaking changes. Word-level diffs of the endpoints you depend on, delivered by webhook the day they change.

## Input

```json
{
  "urls": [
    {
      "url": "https://docs.github.com/en/rest/overview/breaking-changes",
      "label": "GitHub REST breaking changes"
    },
    {
      "url": "https://docs.apify.com/api/v2",
      "label": "Apify API reference"
    }
  ],
  "mode": "selector",
  "selector": "main",
  "ignoreSelectors": [],
  "ignorePatterns": [],
  "learningRuns": 3,
  "volatilityThreshold": 0.6,
  "minChangedWords": 2,
  "confirmRuns": 1,
  "includeUnchanged": false,
  "stateStoreName": "website-change-state",
  "maxConcurrency": 5,
  "timeoutSecs": 45,
  "disableUniversalNoise": false
}
```

## Output

```json
{
  "checkedAt": {
    "label": "Detected",
    "format": "string"
  },
  "label": {
    "label": "Page",
    "format": "string"
  },
  "url": {
    "label": "URL",
    "format": "string"
  },
  "changedPercent": {
    "label": "% changed",
    "format": "number"
  },
  "wordsAdded": {
    "label": "+ words",
    "format": "integer"
  },
  "wordsRemoved": {
    "label": "− words",
    "format": "integer"
  },
  "addedText": {
    "label": "Added",
    "format": "array"
  },
  "removedText": {
    "label": "Removed",
    "format": "array"
  },
  "charged": {
    "label": "Billed",
    "format": "boolean"
  }
}
```

## About this Actor

This example demonstrates how to use [Website Change Monitor — Learns What to Ignore](https://apify.com/drkiwi/website-change-detection.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/drkiwi/website-change-detection.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/drkiwi/website-change-detection.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).