Bridges Claude to your local Thunderbird install via HTTP, exposing 35+ tools across mail, compose, filters, contacts, and calendar. You get full-text search with Gloda integration, threaded reply composition, filter management that persists immediately, and calendar event creation with recurring support. All compose operations open a review window by default unless you pass skipReview. The extension runs a localhost-only HTTP server with session tokens, and the Node bridge handles MCP stdio translation plus lifecycle methods so clients connect even before Thunderbird finishes loading. Account access is user-controlled through the extension settings page, not exposed to MCP. Nothing sends without your approval, and you can block skipReview entirely if needed.
claude mcp add --transport stdio tkasperczyk-thunderbird-mcp uvx thunderbird-mcp