← OneBrain

Install OneBrain

One address, __MCP_URL__, works in every client below. Nothing here carries a token or secret of any kind — the first connection from a new client opens a Google sign-in (OAuth 2.1), the same way Claude’s own connectors work. Paste the address, click the button, or run the command; sign in once when asked.

Claude Code

One command in a terminal.


      
    

  


  

    
Claude (web, desktop, mobile)

    
Settings → Connectors → Add custom connector → name it
      OneBrain → paste the address. On Team or Enterprise, an owner
      adds it once for everyone under Organization settings → Connectors.

    Open Claude Desktop
    claude.ai in the browser
    

      

      
    

  


  

    
Cursor

    
One click. Cursor opens and asks you to confirm.

    Add to Cursor
    
Doesn’t open? Add this to Cursor’s MCP settings
      by hand:

    

      

      
    

  


  

    
VS Code

    
One click. VS Code opens and asks you to confirm.

    Add to VS Code
    
Doesn’t open? Add this to VS Code’s MCP
      settings by hand:

    

      

      
    

  


  

    
Windsurf

    
Settings → Cascade → MCP servers → Manage, which opens
      mcp_config.json. Add this inside
      mcpServers:

    

      

      
    

  


  

    
Codex CLI

    
Add this to ~/.codex/config.toml:

    

      

      
    

  


  

    
Zed

    
Add this to Zed’s settings.json under
      context_servers:

    

      

      
    

  


  

    
Gemini CLI

    
One command in a terminal.

    

      

      
    

  


  

    
Any other MCP client

    
Anything that speaks streamable HTTP takes the same address. Point it
      here; a client with no OAuth support of its own can instead authenticate
      using a personal token from Settings (once signed in), passed however
      that client's own config expects a bearer credential.

    

      

      
    

  


  
Full walkthrough, tools, and the REST API behind all of this:
    Documentation. Questions:
    or@apxlbz.com