Bear App MCP Server

Bear App MCP Server

A Model Context Protocol (MCP) server that provides integration with Bear App using its X-callback-URL scheme. This server enables AI assistants to interact with Bear notes, create new content, search, and manage tags.

Features

• Note Management: Create, open, and modify notes with full metadata retrieval
• Text Operations: Add, append, prepend, or replace text in existing notes
• Search: Search through notes and tags with complete result data
• Tag Management: Get, open, rename, and delete tags with real-time data
• Organization: Archive, trash, and organize notes
• Web Content: Grab content from URLs to create notes with returned metadata
• Special Views: Access Today, Todo, and Untagged note collections with full note lists
• Callback Integration: Advanced x-success callback support for comprehensive data retrieval
• Silent Operation: Custom URL scheme prevents unwanted browser windows during callbacks

Requirements

• macOS (Bear App is macOS only)
• Bear App installed and running
• Node.js 18+
• Bear API token (for some operations)

Quick Installation

Manual Installation

1. Clone and go to the project:

2. Install dependencies:

3. Build the project:

4. Build binaries:

Getting Bear API Token

Some operations require a Bear API token:

On macOS:

1. Open Bear App
2. Go to Help → Advanced → API Token → Copy Token
3. The token will be copied to your clipboard

Configuration

Add the server to your MCP client configuration. For Claude Desktop, add to your claude_desktop_config.json:

Available Tools

Core Note Operations

• bear_open_note: Open a note by ID or title (returns full note data and metadata)
• bear_create_note: Create a new note with title, content, and tags (returns note ID and title)
• bear_add_text: Add text to existing notes (append, prepend, replace)

Search & Discovery

• bear_search: Search notes by term and/or tag (returns complete search results with metadata)
• bear_get_tags: Retrieve all available tags (returns full tags array)
• bear_open_tag: Open notes with specific tag(s) (returns notes list with details)

Organization

• bear_trash_note: Move notes to trash
• bear_archive_note: Archive notes
• bear_get_untagged: Get notes without tags (returns complete untagged notes list)
• bear_get_todo: Get notes marked as todos (returns todo notes with metadata)
• bear_get_today: Get today's notes (returns today's notes with details)

Tag Management

• bear_rename_tag: Rename existing tags
• bear_delete_tag: Delete tags

Web Integration

• bear_grab_url: Create notes from web page content (returns created note ID and title)

Security Notes

• The server uses macOS open command to execute Bear URLs
• API tokens should be kept secure and not shared
• Some operations require Bear to be unlocked (not in locked state)
• Encrypted notes cannot be accessed via the API

Development

Run in development mode:

Build for production:

Enhanced Callback Integration

This server leverages Bear's x-success callback mechanism to provide comprehensive data retrieval:

• Real-time Data: Most operations return actual Bear data instead of generic success messages
• Complete Results: Search operations return full note arrays with metadata
• Immediate Access: Created notes return their IDs for follow-up operations
• Rich Metadata: Notes include titles, identifiers, tags, dates, and content
• Silent Operation: Auto-closing HTML response minimizes browser window interference
• Instant Close: Multiple JavaScript methods ensure browser windows close immediately

Callback-Enhanced Tools

The following tools use advanced callback integration for enhanced data retrieval:

• bear_open_note, bear_create_note, bear_search, bear_get_tags
• bear_open_tag, bear_get_untagged, bear_get_todo, bear_get_today, bear_grab_url

Technical Implementation

Auto-Close HTTP Response: Uses standard http://localhost:port/callback URLs but returns HTML with multiple browser-closing mechanisms:

• Immediate window.close() JavaScript execution
• Meta refresh redirect to about:blank
• Hidden body styling to prevent content flash
• Cache-control headers to prevent browser caching

Browser Window Minimization: While a browser window may briefly appear, it closes automatically within milliseconds, providing near-silent operation.

Limitations

• macOS only (Bear App limitation)
• Some operations require user interaction with Bear
• Callback operations have 10-second timeout limit (with automatic fallback)
• File attachments require base64 encoding
• Bear must be unlocked for encrypted note access
• Brief browser window flash may occur (auto-closes within milliseconds)

License

MIT License - feel free to modify and distribute

Contributing

Contributions welcome! Please ensure:

• TypeScript compilation passes (npm run build)
• Bear URL schemes are correctly implemented
• Callback integration works properly
• Error handling is comprehensive
• Documentation is updated
• Test with npm run test (requires Bear App for full functionality)

Links

• Bear App
• Bear X-callback-URL Documentation
• Model Context Protocol