# Citable > Checks whether AI answer engines (ChatGPT, Claude, Perplexity, Google AI Overviews) can crawl, read and cite a web page, and how to fix what keeps them out. No signup, no model, nothing stored. - [Check a site](https://citable.flisk.si/example.com): put the address after the domain - [JSON API](https://citable.flisk.si/api/check?url=example.com): the same report as JSON - [MCP server](https://citable.flisk.si/mcp): Streamable HTTP, one read-only tool, check_site - [About the checker](https://citable.flisk.si/about): what it fetches and how - [Source](https://github.com/flisk-sh/citable)