Haunter is an open-source application hosted at haunter.app. It keeps notes, tasks, and canvases together, with real-time collaboration and an MCP API for connected AI agents.
Open Haunter · Read the guides · View the changelog · Contribute
See Contributing to Haunter for local setup, validation, the project structure, and how to propose a change. AGENTS.md covers generators, registration requirements, and coding conventions.
- User guides explain how to use Haunter and connect an AI agent.
- Maintainer documentation covers architecture, production operations, MCP contracts, and verification workflows.