Mem9 Server

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Enables AI assistants to manage memories via the mem9 memory service, supporting memory storage, semantic search, retrieval, update, and deletion across multipl

by you06

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About

Enables AI assistants to manage memories via the mem9 memory service, supporting memory storage, semantic search, retrieval, update, and deletion across multiple platforms.

README

Universal MCP Server for mem9 memory service. One server, all platforms.

Quick Start

# Requires a running mnemo-server and API key
git clone https://github.com/you06/mem9-mcp.git
cd mem9-mcp
npm install

Environment Variables

Variable	Required	Default	Description
`MEM9_API_KEY`	Yes	-	API key for authentication (also serves as tenant ID)
`MEM9_API_URL`	No	`https://api.mem9.ai`	mnemo-server base URL
`MEM9_AGENT_ID`	No	auto-detected	Agent identifier
`MEM9_LOG_LEVEL`	No	`info`	Log level: debug, info, warn, error
`MEM9_TIMEOUT_MS`	No	`10000`	HTTP request timeout (ms)
`MEM9_SEARCH_LIMIT`	No	`10`	Default search result limit

Agent ID is auto-detected from platform environment variables (CURSOR_WORKSPACE, CLAUDE_CODE_VERSION, CODEX_CLI_VERSION).

Tools

Tool	Description
`memory_store`	Store a new memory (processed via fact extraction)
`memory_search`	Search memories by semantic similarity and keywords
`memory_get`	Retrieve a specific memory by ID
`memory_update`	Update an existing memory (direct field update)
`memory_delete`	Delete a memory

Development

npm install
npm run build
npm test

Local Testing with Claude Code / Codex

Before publishing, you can test the MCP server locally by pointing to the built entry file:

Claude Code:

claude mcp add mem9 -e MEM9_API_KEY=your-key -e MEM9_API_URL=http://localhost:8080 -- node /path/to/mem9-mcp/dist/index.js

Or in .mcp.json:

{
  "mcpServers": {
    "mem9": {
      "command": "node",
      "args": ["/path/to/mem9-mcp/dist/index.js"],
      "env": {
        "MEM9_API_URL": "http://localhost:8080",
        "MEM9_API_KEY": "your-key"
      }
    }
  }
}

Codex:

codex mcp add mem9 -- node /path/to/mem9-mcp/dist/index.js

Or in .codex/config.toml:

[mcp_servers.mem9]
command = "node"
args = ["/path/to/mem9-mcp/dist/index.js"]

[mcp_servers.mem9.env]
MEM9_API_URL = "http://localhost:8080"
MEM9_API_KEY = "your-key"

After code changes, run npm run build and restart the MCP client to pick up the new build.

Platform Setup

Cursor

Settings > Features > MCP Servers:

{
  "mcpServers": {
    "mem9": {
      "command": "npx",
      "args": ["-y", "@mem9/mcp-server"],
      "env": {
        "MEM9_API_URL": "http://localhost:8080",
        "MEM9_API_KEY": "your-key"
      }
    }
  }
}

Claude Code

claude mcp add mem9 -- npx -y @mem9/mcp-server

Or in .mcp.json:

{
  "mcpServers": {
    "mem9": {
      "command": "npx",
      "args": ["-y", "@mem9/mcp-server"],
      "env": {
        "MEM9_API_URL": "http://localhost:8080",
        "MEM9_API_KEY": "your-key"
      }
    }
  }
}

OpenAI Codex

codex mcp add mem9 -- npx -y @mem9/mcp-server

Or in .codex/config.toml:

[mcp_servers.mem9]
command = "npx"
args = ["-y", "@mem9/mcp-server"]

[mcp_servers.mem9.env]
MEM9_API_URL = "http://localhost:8080"
MEM9_API_KEY = "your-key"

License

Apache-2.0

from github.com/you06/mem9-mcp

Install Mem9 Server in Claude Desktop, Claude Code & Cursor

Recommended · one command, every IDE

unyly install mem9-mcp-server

Installs into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.

First time? Get the CLI: curl -fsSL https://unyly.org/install | sh

Or configure manually

Run in your terminal:

claude mcp add mem9-mcp-server -- npx -y github:you06/mem9-mcp

FAQ

Is Mem9 Server MCP free?

Yes, Mem9 Server MCP is free — one-click install via Unyly at no cost.

Does Mem9 Server need an API key?

No, Mem9 Server runs without API keys or environment variables.

Is Mem9 Server hosted or self-hosted?

A hosted option is available: Unyly runs the server in the cloud, no local setup required.

How do I install Mem9 Server in Claude Desktop, Claude Code or Cursor?

Open Mem9 Server on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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