How to connect Hjarni to Claude Cowork

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks. This guide walks you through the easiest and most secure way to connect your Hjarni account to Cowork via Composio Connect, enabling it to search Hjarni notes about project alpha, create linked notes for meeting decisions, list containers missing required tags, and more such actions on your behalf without compromising your account security.

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Hjarni is a personal knowledge management platform for notes, containers, tags, and linked ideas. It helps you keep knowledge organized, searchable, and easier to maintain.

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Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Hjarni account to Cowork via Composio Connect, enabling it to search Hjarni notes about project alpha, create linked notes for meeting decisions, list containers missing required tags, and more such actions on your behalf without compromising your account security.

Also integrate Hjarni with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

Connecting Hjarni to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your Hjarni account

Back in Cowork, ask the agent to connect to Hjarni or give it any Hjarni-related task.

For example, ask Cowork to:

  • "Search Hjarni notes about project alpha"
  • "Create linked notes for meeting decisions"
  • "List containers missing required tags"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Hjarni account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Hjarni through MCP without you sharing account credentials directly with the agent.

What is the Hjarni MCP server, and what's possible with it?

The Hjarni MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Hjarni account. It provides structured and secure access to your notes, containers, and tags, so your agent can create, find, organize, update, and recover knowledge on your behalf.

  • Note creation and editing: Have your agent create one or many Markdown notes, update their content and metadata, and place them in your inbox or chosen containers.
  • Knowledge search and review: Instruct your agent to list and filter active, archived, favorited, or inbox notes, then retrieve a note with its content, tags, attachments, and links.
  • Container organization: Let the agent create root or nested containers and update their names, descriptions, placement, ordering, or AI instructions.
  • Tag management: Direct your agent to create and rename tags, list available tags, and review how many notes use each one.
  • Trash and account oversight: Have your agent move notes to recoverable Trash, review trashed notes and purge dates, restore notes, or check account usage and quotas.
TOOLS

Supported Tools

Every Hjarni action and event your agent gets out of the box.

Create Container

Create a root or nested Hjarni container for organizing notes.

Create Note

Create a Markdown note in the inbox or a container.

Create Notes

Create 1-25 Markdown notes in order and return one result per input.

Create Tag

Create a Hjarni tag for organizing notes.

Get Account Status

Return the connected Hjarni identity, token scope, plan, teams, and current resource usage and quotas.

Get Note

Get one Hjarni note by ID with its Markdown body, tags, container, attachments, links, and optimistic-lock version.

List Containers

List Hjarni containers as active roots, archived roots, or all active containers in a flat view.

List Notes

List and filter personal Hjarni notes, including active, inbox, archived, or favorited notes.

List Tags

List all Hjarni tags and their note counts.

List Trashed Notes

List recoverable trashed Hjarni notes with their deletion and scheduled purge times.

Rename Tag

Rename an existing Hjarni tag without changing its note associations.

Restore Note

Restore a note from Trash before its scheduled purge and return the active note.

Move Note to Trash

Move a note to recoverable Trash.

Update Container

Update a Hjarni container's name, description, parent, position, or container-specific AI instructions.

Update Note

Update note metadata, placement, tags, or body.

FRAMEWORKS

How to build Hjarni MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Hjarni MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Hjarni MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Hjarni MCP with Claude Code

Codex logo

Codex

Use Hjarni MCP with Codex

OpenClaw logo

OpenClaw

Use Hjarni MCP with OpenClaw

Hermes logo

Hermes

Use Hjarni MCP with Hermes

CLI logo

CLI

Use Hjarni MCP with CLI

Google ADK logo

Google ADK

Use Hjarni MCP with Google ADK

LangChain logo

LangChain

Use Hjarni MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Hjarni MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Hjarni MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Hjarni MCP with LlamaIndex

CrewAI logo

CrewAI

Use Hjarni MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Hjarni MCP server, the agents and LLMs can only access a fixed set of Hjarni tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Hjarni and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Hjarni tools.

Yes, absolutely. You can configure which Hjarni scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Hjarni data and credentials are handled as safely as possible.

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Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

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As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

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Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

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With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

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Co-Founder, Ingram Technologies