Hjarni has a built-in MCP server. That means Claude, ChatGPT, and any other assistant that speaks MCP can read and write your notes directly.

Claude. Add Hjarni as a connector in Claude.ai, Claude iOS, or Claude Desktop. Sign in once. Done.

ChatGPT. Add Hjarni as a connector in ChatGPT (Plus, Pro, Business, Enterprise, or Education).

Anything else. If your AI can call MCP servers, it can use Hjarni.

Once connected, your AI follows whatever instructions you've set on a folder, on a team, or in your global settings. Tell it once how you want notes formatted and it sticks.