# Pancake POS Developers > Developer documentation for Pancake POS: the Open API to connect your systems, POS Apps to extend the POS interface, and MCP to let AI assistants work with shop data. ## Open API A REST API to read and write a shop's orders, products, inventory, customers and reports with an API key. - [llms.txt](https://pos.pages.fm/developers/api/llms.txt) - [Full docs for AI](https://pos.pages.fm/developers/api/llms-full.txt) ## POS Apps Custom apps that run inside the shop's POS: add buttons, info blocks, pages and hooks to the interface. - [llms.txt](https://pos.pages.fm/developers/apps/llms.txt) - [Full docs for AI](https://pos.pages.fm/developers/apps/llms-full.txt) ## MCP Connect Claude, Codex or Cursor to Pancake POS to create orders, check revenue and look up stock in plain language. - [llms.txt](https://pos.pages.fm/developers/mcp/llms.txt) - [Full docs for AI](https://pos.pages.fm/developers/mcp/llms-full.txt) ## Optional - [Tiếng Việt](https://pos.pages.fm/developers/vi/llms.txt)