Notion

Notion's official MCP server does exactly what you'd hope: it lets Claude read, write, and comment on your Notion workspace without you copy-pasting markdown or wrestling with the API yourself. I've been using it to prototype a personal research assistant that pulls highlights from my reading database, cross-references them with project notes, and drafts synthesis documents directly into new pages. It works. The big win is that it's first-party. Notion built this, so it tracks their API changes and handles pagination, block types, and database queries without the jank you'd expect from a community wrapper. You can ask Claude to "find all pages tagged 'client work' updated this week" or "add a comment to the standup doc with today's blockers," and it just does it. The server exposes tools for searching, creating pages, appending blocks, querying databases, and managing comments. That's the full surface area most agents need. Quirks: it requires a Notion integration and API key, which means a bit of OAuth setup if you're not already familiar. The permissions model is Notion's, so you'll need to explicitly share databases and pages with the integration. That's sensible but easy to forget when Claude suddenly can't see a workspace you know exists. Also, this is read-write by default. If you're pointing an experimental agent at your life's work, test it in a sandbox workspace first. I learned this the expensive way with a draft that got overwritten mid-edit. Who shouldn't bother: if you're just using Notion as a glorified Google Docs and never touch databases or properties, this is overkill. Same if you're already happy with Notion's built-in AI features and don't need a separate agent. But if you're building a personal knowledge system, running a small team wiki, or prototyping AI workflows that need structured data stores, this is the best-in-class option. It's what I'd reach for before rolling my own API client every time.