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JustOnce

Official registry AI and agents

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

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http justonce 'https://mcp.justonce.ai'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "justonce": {
            "type": "http",
            "url": "https://mcp.justonce.ai"
        }
    }
}

Frequently asked questions

What is JustOnce?

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

How do I install JustOnce?

It runs as a remote server. In Claude Code: claude mcp add --transport http justonce 'https://mcp.justonce.ai'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does JustOnce need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains JustOnce?

It is published by ai.justonce. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.