E2B (Python) MCP server

This MCP server from E2B allows you to run code in a secure sandbox when using Claude. It implements the Model Context Protocol, enabling Claude to execute code safely in isolated environments.

Installation

Prerequisites

You need to have the uv Python package manager installed on your system. You can install the E2B MCP server using:

uv install e2b-mcp-server

Configuration for Claude Desktop

To use this MCP server with Claude Desktop, you need to add server configuration to Claude's config file:

On MacOS: Edit or create the file at ~/Library/Application Support/Claude/claude_desktop_config.json

On Windows: Edit or create the file at %APPDATA%/Claude/claude_desktop_config.json

Add the following configuration:

{
  "mcpServers": {
    "e2b-mcp-server": {
      "command": "uvx",
      "args": ["e2b-mcp-server"],
      "env": { "E2B_API_KEY": "${e2bApiKey}" }
    }
  }
}

API Key Setup

You'll need an E2B API key to use this server:

1. Sign up at E2B to obtain your API key
2. Make sure the ${e2bApiKey} in the configuration is replaced with your actual API key

Usage

Basic Usage

Once installed and configured, Claude Desktop will automatically use the E2B MCP server for executing code in a secure sandbox. You don't need to manually interact with the server - Claude will communicate with it directly.

Troubleshooting

If you encounter issues with the server:

1. Check that your API key is correctly configured
2. Verify that the uvx command is available in your PATH
3. Make sure Claude Desktop is properly configured with the server details

Debugging

For advanced debugging, you can use the MCP Inspector:

npx @modelcontextprotocol/inspector \
  uv \
  --directory . \
  run \
  e2b-mcp-server

This will provide a URL to access debugging tools in your browser, allowing you to inspect the communication between Claude and the MCP server.

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.