AddCal is a Model Context Protocol (MCP) server: Publish public calendars and events others subscribe to: RSVPs, feeds and add-to-calendar links. Because it speaks the Model Context Protocol, AI assistants can use AddCal as a set of callable tools instead of you copy-pasting between apps.
It's a hosted (remote) server — point your client at https://addcal.co/mcp and you're connected, with nothing to install locally. The current release is v1.0.1, published under the MIT license, with source at addcal/mcp on GitHub.
On mcp.site, AddCal sits in the Productivity category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain AddCal for addcal.co, claim this listing to verify ownership, earn the Verified badge, and keep the details current.