Capacities MCP server
planned
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Niels van Zwieten
It'd be awesome if we could access Capacities through an MCP server, either via stdio or as a remote SSE endpoint.
I believe Capacities could be used similar to the memory MCP server. The API is missing the required endpoints for it.
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Steffen Bleher
marked this post as
planned
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Michael S
Steffen Bleher it's happening 🎉
Beth
Merged in a post:
Building a second brain with AI
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Mark Mindenhall
Nate B. Jones has posted two fantastic videos (https://www.youtube.com/watch?v=0TpON5T-Sw4, https://www.youtube.com/watch?v=_gPODg6br5w) within the past week about building a second brain with AI. He initially talked about a workflow design using Slack for capture, Zapier to orchestrate, AI (ChatGPT, Claude, etc) to categorize/sort, and Notion for storage. I went down a rabbit hole looking at alternative tools to implement this, which led me to Capacities.
Capacities is awesome as a standalone product, but I don't think it's possible to implement the BASB with AI workflow due to the limited API. I.e., if I typed in Slack "add blah blah blah as a next action for project Acme", AI would need to be able to use an MCP server to:
- Search for a Project called Acme
- Read that object and ascertain that it has a "Next Actions" block
- Append to that block, and write the object back
I think the "Lookup content" endpoint could be used to find the Acme Project, but it only returns the "id", "structureId", and "title" of the object, which is not sufficient. There's no way to get the full content of the object, modify it, and write it back.
Why does this matter? I asked Claude "Why is it important in 2026 for a note taking product to provide full access to read and write data via an API (which can be wrapped in an MCP server)?", and here were the two top reasons given:
Interoperability with AI assistants. Users increasingly want their notes accessible to AI tools—whether for summarization, search, task extraction, or connecting ideas across documents. An API lets assistants like Claude read and act on notes without requiring copy-paste or manual uploads. MCP specifically standardizes this, so a single integration works across multiple AI systems.
Workflow automation. People build pipelines connecting their tools: a meeting transcript gets summarized, key points go to notes, action items go to a task manager, and relevant contacts get flagged in a CRM. Without an API, the note-taking app becomes a dead end in these flows.
If you had a full-featured API, I would be signing up to build this workflow with Capacities, but for now I'll need to use a different tool instead.
Beth
Merged in a post:
Create a Claude Skill for Claude to interact with (CRU(D)) workspace content
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Marjan Venema
Background:
Claude supports creating Skills now: Anthropic account wide built-in and custom processes that can be used across the full Anthropic Claude landscape.
I'm using Claude Code to build agents to help me with my work. Part of that involves researching leads and creating pages and other objects (like a lead object from the person template), including setting up projects (with standard content and tasks from a template) when I land work.
Problem:
Currently Claude Code creates markdown files for me. If I want them in my Client work Capacities space, this involves manual copy-pasting and linking. I'd rather have Claude do that for me.
Request:
Create a (set of) Claude Skills for us to use and make our lives easier and less tedious.
Note: AFAICT from the Capacities' API docs, it would require extending the API to enable more interaction with my Capacities content: getting lists of objects (types and instances) and CRU(D) operations. That wouldn't be a bad thing anyway. Adding the Claude Skill would mostly be icing on the cake.
Note: offering an MCP server for any AI (model) to use probably makes more business sense. Would be happy to create a Claude Skill based on that myself.
References:
- What are Claude Skills: https://support.claude.com/en/articles/12512176-what-are-skills
- Skills overview: https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview
- Creating custom skills: https://support.claude.com/en/articles/12512198-how-to-create-custom-skills
- Existing Claude Connectors: https://claude.com/connectors
- Claude's own built-in skills and examples: https://github.com/anthropics/skills/tree/main
- Claude's cookbook: https://github.com/anthropics/claude-cookbooks/tree/main
- MCP - Model Context Protocol: https://www.anthropic.com/news/model-context-protocol
- Notion's Claude Skills offerings: https://www.notion.so/notiondevs/Notion-Skills-for-Claude-28da4445d27180c7af1df7d8615723d0
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Moritz Selbach
Limited API not beeing able to created objects and bo MCP Server is really holding back right now. Should be added soon!
Beth
Merged in a post:
MCP server for AIs to download data and manage it, edit descriptions content tags, tidy up. Pass on the knowledge to LLM.
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Jan Sachse
Hey. Notion has mcp server which is great. It lets LLM from yourdesktop that is engaged in a project scan and edit documents. Capacities could be even better with this option as its much more system based with csv format. I want my LLM to tidy up my mess or learn about me to understand the context and add some notes when i need them. Or add calendar event or create bulk contacts from my contact list, create description for all unwatched movies....There are just so many options, and MCP servers aren't very time consuming to make :)
Steffen Bleher
Merged in a post:
Allow Claude to Access Capacities
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David Jaggi
I would like to see an integration of Capacities into Claude via the Model Contect Protocol.
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Jan Sachse
Imagine pulling your notes to Claude and asking him to add somthing to your calendar and create a task object with deadline
Beth
Merged in a post:
MCP for Claude and other LLM
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Jan Sachse
Love your up. I'm currently switching from Notion. Normally i use MCP to write some of my notes by LLMs, or organize my docs, or I make the LLM look at some of my docs to understand topic or my self. MCP server for creating, adding tags, new objects, creating structured projects in Capacities would be great! Really appreciate what you are doing!
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Carl Erhard
I got this working with this MCP server in just a few minutes: https://mcpmarket.com/server/capacities
Having this AI front end my personal knowledge database is so nice, and now I can do it all from my IDE.
My only complaint, I guess, is that the API for Capacities seems to be rather limited at the moment. We can get information about a space, we can search for notes. This is awesome for browsing and asking AI questions. However, the only things we can create are weblinks and daily notes. Having the ability to create other content would make this pretty powerful.
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Michael Bennett
Two use cases:
I would like to use Claude to merge context from Things and Capacities and help me with decision support. Things knows the full set of stuff I have to do that's been processed/broken into action items, but Capacities has the running log of what my day has been like so far. Together Claude can infer e.g. my energy level and what's been working well so far. Right now I copy the daily note in by hand and I could probably get a server set up manually but it would be nice to have a push-button integration available.
The other use case is to walk the tree of my Zettelkasten notes to extract possible topics for my newsletter from what I've been thinking about lately. Again I can do this with Capacities by exporting my database and then giving Claude access to my filesystem but a tighter integration would be convenient.
I prefer to use Claude rather than the native OpenAI integration both because I prefer Anthropic over OpenAI for a variety of reasons and because Claude has other integrations that it can bring in for additional context.
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