Give your AI a memory in about a minute
One endpoint, every assistant. Add JustOnce to Claude, ChatGPT, Cursor, VS Code, Windsurf, Gemini, or any MCP client — then sign in with OAuth. No API key required.
Choose your assistant, follow four steps
Every tool connects to the same endpoint and shares one memory. Setup takes about a minute — no API key, just an OAuth sign-in.
Claude Code
One command in your terminal
- 1
Open your terminal
Anywhere Claude Code runs — no project or config file to edit first.
- 2
Run the connect command
Registers JustOnce as a remote MCP server over Streamable HTTP.
- 3
Sign in with OAuth
Claude Code opens your browser to sign in with Auth0. No API key needed.
- 4
Tell it to remember something
Say “remember that…” and Claude stores it — then recalls it in every session.
Run this command
claude mcp add --transport http justonce https://mcp.justonce.aiSign in with OAuth — no API key to paste. JustOnce uses Auth0 (PKCE + Dynamic Client Registration).
Adds JustOnce as a remote MCP server; the OAuth sign-in opens in your browser.
Connected
Your assistant now shares one persistent memory — in every session.
Every client, one endpoint
Whatever you connect, it’s the same remote MCP server and the same memory. No per-tool accounts, no key juggling.
Free includes 2 connected assistants — Plus and Pro are unlimited.
Claude Code
One command in your terminal.
claude mcp add --transport http justonce https://mcp.justonce.ai
Claude Desktop
Add a custom connector.
https://mcp.justonce.ai
ChatGPT
Enable developer mode, add a connector.
https://mcp.justonce.ai
Windsurf
Add a remote MCP server.
https://mcp.justonce.ai
Gemini CLI
One command in your terminal.
gemini mcp add --transport http justonce https://mcp.justonce.ai
Any MCP client
Works with any remote connector.
https://mcp.justonce.ai
Free forever. No card required. Never used to train models.
Connecting, answered
Do I need an API key to connect?
No. Every client signs in with OAuth (Auth0) — using PKCE and Dynamic Client Registration, so there is no API key to copy, paste, or store. You just approve a browser sign-in the first time.
Which AI tools can connect to JustOnce?
Claude Code, Claude Desktop and claude.ai, ChatGPT, Cursor, VS Code, Windsurf, the Gemini CLI, and any assistant that supports a remote (Streamable HTTP) MCP connector. They all share one memory.
What is the connection endpoint?
https://mcp.justonce.ai — a remote MCP server over Streamable HTTP. Add it once per tool and sign in with OAuth; no local install or proxy is required.
Is my memory shared across every tool?
Yes. Every connected assistant reads and writes the same JustOnce memory, so a fact you save in one tool is recalled in all of them — in every session.
Stop re-introducing yourself to your AI
Setup takes about a minute. Free forever — no card required.
Connect Claude, ChatGPT, Cursor, VS Code, Windsurf, Gemini & any MCP client