Open source · AGPLv3 Licensed

Notes for
humans & agents

The note-taking app with a built-in MCP server. Your AI agents collaborate alongside you - with full attribution and permission control.

Get Started Star on GitHub

duet

[duet]

All Notes

Todos

Activity

Agents

claude

All Notes

agent:claude

Research Notes

Found papers on multi-agent...

you

Sprint Planning

Discussed deploy timeline...

you

Deploy Checklist

1. Run migrations 2. Env vars...

Research Notes

agent:claudev3 · Mar 15

Found several papers on multi-agent collaboration. The ReAct framework shows promise for combining reasoning and action in autonomous agents.

Key Findings

ReAct improves task completion by 30%
MCP protocols outperform custom integrations
Clear attribution is essential for human-agent trust

Works with

Claude

Cursor

VS CodeAny MCP client

Why Duet

The notes app that
speaks MCP.

Traditional note apps weren't designed for AI agents.

Traditional

Duet

Agent access

None

Built-in MCP server, 12 tools

Attribution

No tracking

Per-note, per-edit author tracking

Permissions

All or nothing

Granular - agents can't delete

Real-time

Manual refresh

WebSocket push updates

Data

Their servers

Your PostgreSQL, your server

Extensibility

Plugins maybe

CLI, REST API, MCP, webhooks

Features

Everything you need to
build with agents.

MCP Server

Your agents write alongside you.

12 tools out of the box. Any MCP-compatible agent connects in seconds.

$ npx @noteduet/mcp-server

12 Tools

create_note

read_note

update_note

search_notes

list_notes

archive_note

create_todo

complete_todo

list_todos

update_todo

get_activity

get_history

Attribution

Always know who wrote what.

v3YouAdded checklist2h

v2agent:claudeResearch findings5h

v1YouCreated note1d

Permissions

Your data, your rules.

agent → read✓

agent → write✓

agent → archive✓

agent → delete✕

◉

Real-time sync

Agent writes a note? You see it instantly. WebSocket push via PostgreSQL LISTEN/NOTIFY.

▸

CLI & API

Full command line. Pipe-friendly. JSON output. Complete REST API for any integration.

◷

Calendar sync

Todos sync to Google Calendar. Agent events flagged. Two-way sync.

✎

Rich editor

Headings, lists, checklists, code blocks, images. Drag blocks to reorder.

↺

Version history

Every edit tracked with author. Restore any version. Full diff timeline.

⌕

Full-text search

PostgreSQL tsvector powered. Instant search across all your notes.

How it works

Three steps.
Five minutes.

Connect your agent

Write together

You write in the editor. Agent writes via MCP. Both in real-time with clear attribution.

Stay in control

Review agent content. Manage permissions. Track every change.

Pricing

Simple. Transparent.

Self-host free forever. Or let us handle everything.

Self-hosted

Free

Open source · AGPLv3

✓Unlimited everything
✓Full MCP server
✓CLI & API
✓Calendar sync
✓Rich editor
✓Your server, your data

Get Started

Duet Cloud

Coming Soon

$8/mo

Hosted · Zero setup

✓Everything in self-hosted
✓No server to manage
✓Automatic backups
✓Google & GitHub login
✓File storage included
✓Priority support

Coming Soon

FAQ

Questions & answers

A self-hosted note-taking app with a built-in MCP server. AI agents read, write, and collaborate on notes - with full attribution and permission control.

Model Context Protocol - an open standard for AI agent tool use. Duet exposes 12 tools for notes and todo management.

No. Agents can read, write, and archive - never delete. This is a core safety boundary that can't be overridden.

Any MCP client: Claude Code, Cursor, VS Code, OpenClaw, or any custom agent that speaks MCP.

Self-hosted is free and open source under the AGPLv3 license. Duet Cloud (hosted version) is coming soon at $8/mo.

Yes. CLI, API, or direct database access. No lock-in, ever.