com.hjarni/hjarni

Official

by hjarni

Markdown-based note-taking with a hosted MCP server. Your notes serve you and your AI.

Markdown-based note-taking system with hosted MCP server for AI-assisted note management.

<img src="docs/icon.png" alt="Hjarni" width="80" /> <h1 align="center">Hjarni</h1> Give your AI long-term memory. Note-taking app with a built-in MCP server. <a href="https://hjarni.com">Website</a> · <a href="https://hjarni.com/docs">Docs</a> · <a href="https://hjarni.com/blog">Blog</a>

What it does

Hjarni is an AI-native note-taking app. Write notes in Markdown, organize them in folders with custom AI instructions per folder, and let Claude or ChatGPT search, read, create, and organize your notes via MCP.

Your notes serve two readers: you and your AI. Hjarni stores the knowledge. ChatGPT and Claude are the interfaces.

Connect

Hjarni is a hosted remote MCP server with OAuth authentication. No API keys, no Docker, no local setup. Setup takes under 2 minutes.

Claude.ai / Claude iOS

Open Settings > Integrations
Tap Add custom connector
Set the name to hjarni and the URL to https://hjarni.com/mcp
Tap Add and log in to Hjarni when redirected

Requires Claude Pro or Team plan for MCP integrations.

Claude Desktop / Claude Code

Add to your MCP config (claude_desktop_config.json or .claude.json):

json

{
  "mcpServers": {
    "hjarni": {
      "url": "https://hjarni.com/mcp",
      "type": "streamable-http"
    }
  }
}

Works on any Claude plan. Authenticates via OAuth on first connection.

ChatGPT

Go to chatgpt.com > Settings > Connectors
Enable Developer mode
Tap Create app
Set the name to hjarni and the MCP Server URL to https://hjarni.com/mcp
Set authentication to OAuth
Tap Create and log in to Hjarni when redirected

Requires ChatGPT Plus, Pro, or Team plan.

Other MCP clients

Any client that supports streamable HTTP transport can connect. The endpoint is https://hjarni.com/mcp. Authentication uses OAuth 2.0 with PKCE. Discovery metadata is at /.well-known/oauth-authorization-server.

Available tools

Tool	Description
`search`	Full-text search across notes, containers, and tags
`notes-create`	Create a new note with title, body, tags, and container placement
`notes-get`	Read a single note including full content, tags, and linked notes
`notes-list`	List notes with filtering by container, tags, and sorting
`notes-update`	Update content, move notes, change tags, archive/unarchive
`notes-delete`	Permanently delete a note
`containers-list`	List folders for organizing notes
`containers-create`	Create new folders
`containers-get`	Get a single container with its AI instructions
`containers-update`	Update a container (rename, move, change description)
`tags-list`	List all tags
`tags-create`	Create new tags
`links-manage`	Create or remove bidirectional links between notes
`instructions-get`	Read AI instructions set on a folder
`instructions-update`	Update folder-level AI instructions
`files-attach`	Attach a file to a note
`files-attach_from_url`	Fetch a file from a URL and attach it to a note
`files-get_download_url`	Get a temporary download URL for a file
`files-remove`	Remove a file attachment
`dashboard-get`	Overview of the account: note count, containers, tags, inbox
`teams-list`	List all teams the user is a member of
`teams-get`	Get team details including recent notes

Built-in prompts

The server also exposes MCP prompts for clients that support prompt discovery:

Prompt	Description
`summarize_note`	Summarize a note and suggest tags and related links
`weekly_review`	Review recent activity and suggest organization improvements
`research_topic`	Synthesize everything in the knowledge base related to a topic

Usage examples

Research assistant

"What decisions have I made about the tech stack?"

Claude searches your notes, follows wiki-links between related notes, and synthesizes a summary from multiple sources.

Quick capture

"Save this as a note in my Projects folder and tag it"

Claude finds the right container, creates the note with Markdown formatting, adds tags, and links it to related notes.

Weekly review

"Help me triage my inbox"

Claude lists unfiled notes, suggests where each belongs based on your folder structure, and moves them with your approval.

Writing with context

"Draft a project update using my recent meeting notes"

Claude pulls relevant notes and uses them as source material.

Features

Markdown notes with full formatting support
Wiki-links ([[id:Note Title]]) for cross-referencing
Folders with custom AI instructions per folder
Full-text search across all content
Bidirectional linking between notes
Tags for cross-cutting categorization
File attachments (Pro plan and above)
Team collaboration with shared knowledge bases
REST API for custom integrations
Export your data as Markdown at any time

MCP server details


Endpoint	`https://hjarni.com/mcp`
Transport	Streamable HTTP with JSON-RPC 2.0
Protocol versions	`2025-03-26` and `2024-11-05`
Authentication	OAuth 2.0 (PKCE) or Bearer token
Capabilities	Tools and prompts

For the full protocol reference, see the MCP server docs.

Pricing

Plan	Price	What you get
Free	$0	25 notes, containers, tags, search, full MCP & API access
Pro	$10/mo	Unlimited notes, file attachments, share with 2 collaborators
Teams	$13/seat/mo	Shared knowledge base, team MCP & API, member management

Also available in EUR and GBP. See pricing.

Support

Email evert@hjarni.com.

Install

claude_desktop_config.json

{
  "mcpServers": {
    "hjarni": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://hjarni.com/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.