JustOnce MCP Server: Install & Setup

Install JustOnce in Claude Code

Claude Code

claude mcp add --transport http justonce https://mcp.justonce.ai

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "justonce": {
      "url": "https://mcp.justonce.ai"
    }
  }
}

Frequently asked questions

What does the JustOnce MCP server do?

Persistent memory for AI assistants — one shared, OAuth-secured vault for every MCP client.

Is the JustOnce MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does JustOnce run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add JustOnce to Claude Code?

Run: claude mcp add --transport http justonce https://mcp.justonce.ai

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