zed-code-runner

The zed-code-runner MCP server exposes the Code Runner capabilities from the Code Runner MCP Server to Zed's Agent Panel. It enables executing code snippets across 30+ languages directly from Zed, including JavaScript, Python, Go, Java, C#, Ruby, PHP, Shell, and more. After enabling the extension, you can invoke the run-code tool from the Agent Panel by providing a code snippet and (optionally) specifying the language. Examples of prompts include: 'Run the JavaScript code: console.log(5+6)', 'Run this Python snippet: print("Hello from Zed!")', or 'How many CPUs do I have? Use run-code tool'. The tool handles sending the code to the underlying MCP server, which executes it in the appropriate runtime and returns the result or any errors.

Prerequisites:

• Node.js and npm installed on your development machine
• Zed editor installed
• Access to install Zed extensions (including development extensions)

Installation steps:

1. Install Node.js (recommended LTS) and npm from https://nodejs.org
2. Clone the MCP server repository: git clone https://github.com/formulahendry/zed-code-runner-mcp-server.git
3. Navigate to the project directory: cd zed-code-runner-mcp-server
4. Install dependencies (if applicable): npm install
5. In Zed, install this as a development extension:
   • Extensions → Install Dev Extension → Select this directory
6. Start the MCP server if required by your setup, or rely on Zed to launch via the extension configuration

Note: The extension wraps the mcp-server-code-runner package and exposes its run-code tool inside Zed. Ensure any language runtimes you want to use are installed and available in your PATH.

Environment and configuration tips:

• Ensure the interpreters/compilers for desired languages are installed and accessible via PATH.
• If you encounter permission or port issues, verify that the MCP server can bind to the required port and that the host allows network access for the extension.
• The run-code tool supports a wide range of languages; consult the underlying Code Runner MCP Server documentation for specific language requirements and compatibility.
• If using a local development setup, you may need to adjust the path to server.js in the MCP config.
• When deploying, ensure the NPM package mcp-server-code-runner is available in the runtime environment to support code execution.