Connect Claude, ChatGPT, Gemini, Notion, and Claude Code to share the same long-term memory tree.
After completing this guide, your external AI apps will connect to your memory tree through dedicated MCP URLs: at the start of every conversation they read your background and preferences, and whenever you mention a new fact, preference, decision, or update about yourself they write it back to the memory tree. This guide assumes you have already deployed OpenMousse (or installed the standalone mousse-tree service).
Prerequisites
•A running OpenMousse server paired with the app, or a standalone mousse-tree service installed on a server with Python 3.11 or later (see the appendix at the end of this page).
•To connect cloud AI apps (Claude on the web, ChatGPT, Gemini, Notion), your memory tree service must be reachable at a public HTTPS URL (local command-line tools such as Claude Code can use a LAN or Tailscale address).
•Plan or region requirements on some platforms: ChatGPT requires a Plus subscription or higher; Notion requires a Business plan or higher; Gemini's connector feature is subject to Google's regional availability and must be used in a supported region.
Privacy Notes
•What is read and written: The memory tree receives facts, preferences, decisions, and opinions about you that come up in those AI apps; the full conversation transcripts in each platform stay where they are.
•Data isolation boundary: Authorized external AI apps can only read and write the memory tree; they cannot read OpenMousse conversation history, health data, or the independent memories of your functional agents.
•Source tracking and instant revocation: Each platform uses its own URL with a dedicated token, which the server uses to record the source of every leaf. You can delete any platform's URL in the OpenMousse app at any time; once deleted, restarting the memory tree service disconnects that platform immediately (if the memory tree runs as a system service, the app restarts it automatically; otherwise restart the service manually).
Steps
1. Get Dedicated Connection URLs in the App
1.In the OpenMousse app, open Settings → Memory tree → Connect your AI.
2.Select the target platform you want to connect, then generate and copy that platform's dedicated tokenized URL.
!
Important: Public HTTPS and Admin Page Isolation
Claude (web), ChatGPT, Gemini, and Notion connect from their own cloud servers, so your memory tree service must be served over public HTTPS. If you expose a standalone mousse-tree instance through a reverse proxy, expose only the /t and /m path prefixes; never expose the admin page to the public internet.
2. Configure the MCP Connection on Each Platform
Follow the steps for the platform you are connecting:
Platform
Configuration Path and Steps
Claude
1. On claude.ai, open Settings → Connectors → Add custom connector.2. Set the name to Memory tree, paste the dedicated URL from the app, and leave authentication blank.
ChatGPT
1. In ChatGPT (Plus or higher required), open Settings → Apps & Connectors → Advanced and enable Developer mode.2. Click Create, paste the dedicated URL from the app, and set authentication to None.
Gemini
On gemini.google.com, open Settings → Connected Apps → Add custom app and paste the dedicated URL from the app (must be used in a region where the provider supports this feature).
Notion
1. In Notion (Business or higher required), open Custom Agent → Tools & Access → Custom MCP server.2. Enter the server URL, select Bearer token authentication, and paste the token provided by the app into the token field.
Claude Code
Run the following command in your terminal, replacing <URL> with the dedicated URL from the app:claude mcp add --transport http tree <URL>
Other MCP-compatible AIs
In the target app's MCP, Connector, or Tools settings, add a remote MCP server (Streamable HTTP), paste the dedicated URL from the app, and leave authentication unconfigured. If its web app does not yet support remote MCP, use its CLI or any MCP-compatible client.
3. Paste Custom Instructions and Turn Off Built-In Memory
Copy the following instruction into the custom instructions of each connected app (for Notion, put it in the Custom Agent's Instructions; for Claude Code, put it in your project CLAUDE.md or global CLAUDE.md):
Text
At the start of a conversation, call profile and recall to learn about me; whenever I state a new fact, preference, decision, or update about myself, call remember.
Then turn off the app's built-in memory feature in its settings so the two systems do not drift out of sync.
Appendix: Install Only the Standalone Memory Tree
If you do not need a full OpenMousse deployment, you can run the memory tree service on its own on any server with Python 3.11 or later:
•You can replace the first line with pip install --user "git+https://github.com/openmousse/openmousse#subdirectory=tree".
•Replace the --tz value with your actual time zone.
•By default, the service listens only on 127.0.0.1:8787. Run mousse-tree urls to view the tokenized URLs for each platform in your terminal (view these only inside your own terminal).
How to Verify
The connection is working when all of the following hold:
Next Steps
•Memory Tree: Learn about the leaf format and how to switch between SQLite and a Markdown vault (mousse-tree migrate).
•Data and Security: Review how external apps are isolated and where data lives on your server.
Last updated 2026-10-19Was this page helpful?Thanks for your feedback
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