# Argon (MCP server)

> Argon is an MCP server that adds database tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Versioned MongoDB sandboxes for AI agents: branch, time-travel, merge, and undo over MCP. It has 172 GitHub stars, is released under the MIT license and runs locally with npx -y argonctl.

Branch, time-travel, merge and undo your MongoDB. Any driver, real mongod, versioned history underneath. Built for AI agents.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/argon-lab/argon |
| GitHub stars | 172 |
| License | MIT |
| Language | Go |
| Transport | stdio |
| Packages | npm: argonctl |
| Remote URL | none |
| Needs API key | no |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Databases |
| Latest release | v2.1.2 (Sep 24, 2026) |
| Last commit | Oct 2, 2026 |
| MCP registry name | io.github.argon-lab/argon |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "argon": {
      "command": "npx",
      "args": [
        "-y",
        "argonctl"
      ]
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --transport stdio argon -- npx -y argonctl
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "argon": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "argonctl"
      ]
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "servers": {
    "argon": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "argonctl"
      ]
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

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