Codex MCP Go
C

Codex MCP Go

An MCP server implemented in Go language that encapsulates the OpenAI Codex CLI, enabling AI clients to call Codex for code generation, debugging, and repair.
2.5 points
0

What is Codex MCP Go?

Codex MCP Go is an MCP (Model Context Protocol) server developed based on the Go language. It acts like an interpreter, allowing the AI programming assistant you are using (such as Gemini or Claude) to understand and call another powerful code expert - OpenAI's Codex CLI. In simple terms, it enables different AIs to collaborate: your main AI (such as Gemini) is responsible for planning and creativity, while Codex serves as a professional 'code special forces', responsible for performing complex code generation, debugging, and repair tasks.

How to use Codex MCP Go?

It's very simple to use, just follow three steps: 1. **Install prerequisite tools**: Ensure that the OpenAI `codex` command-line tool is installed on your computer. 2. **Install this server**: You can run it with a single command using `npx`, or download the compiled program. 3. **Configure your AI client**: In the AI programming tool you are using (such as KiloCode, Roo Code, Cursor), add this server as an MCP tool. After the configuration is complete, your AI assistant can directly call Codex during the conversation.

Applicable scenarios

Codex MCP Go is particularly useful in the following situations: - **Complex code generation**: When you need to generate boilerplate code for a complete function or module. - **Tricky bug fixing**: When the code logic is complex and the main AI has difficulty locating the root cause of the problem. - **Code review and optimization**: When you want to get another 'expert perspective' to review the code quality and propose improvement suggestions. - **Following precise instructions**: When you need to strictly follow specific coding specifications or implementation details.

Main features

AI collaboration bridge
Seamlessly connects your main AI (planner) with Codex (executor), enabling a collaborative programming workflow that complements each other's strengths.
Conversation context management
Supports multi-round conversations. The main AI can save the conversation ID and conduct continuous and in-depth discussions with Codex on the same complex issue.
Secure sandbox control
Provides various security policies (such as read-only mode and workspace write mode) to prevent Codex from accidentally modifying files and ensure code security.
High performance and easy deployment
Compiled into a single executable file based on the Go language, it starts quickly, occupies few resources, and does not require a complex runtime environment. It's ready to use out of the box.
Complete log tracking
Optionally obtain the complete inference process and tool call logs of Codex to help you understand its decision-making process.
Advantages
**Powerful combination**: Combines the macro planning ability of the main AI (such as Gemini) with the precise execution ability of Codex at the micro code level.
**Improved efficiency**: Assigns the most difficult coding tasks to the most suitable expert (Codex), reducing the trial and error and freezing of the main AI.
**Safe and controllable**: Through the sandbox strategy, you can control the permissions of Codex. The default read-only mode is very safe.
**Easy to integrate**: As a standard MCP server, it can be easily integrated into many popular AI programming clients.
**Simple to deploy**: Provides one-click running with `npx` and a single-file binary, which is extremely user-friendly.
Limitations
**Double dependency**: You need to install and configure both the Codex CLI and this MCP server.
**Extra cost**: Using the Codex CLI may incur OpenAI API call fees (depending on your Codex configuration).
**Learning curve**: Users need to understand the collaborative mode of 'main AI planning, Codex execution' and configure the system prompt words of the client to achieve the best results.
**Network requirements**: Calling Codex requires a stable network connection.

How to use

Install prerequisite tools (Codex CLI)
First, you need to install the official OpenAI Codex command-line tool on your computer. Open the terminal and run the following command:
Run the Codex MCP Go server
You don't need to install the Go environment. The simplest way is to use the `npx` command, which will automatically download and run the latest version:
Configure your AI client
According to the AI programming tool you are using, add the MCP server configuration. Here is a general JSON configuration example (applicable to Roo Code, KiloCode, etc.):
Configure system prompt words (key step)
To let your main AI know how to collaborate with Codex, you need to provide it with collaboration rules. We have prepared expert mode files for different clients. Please import the corresponding files: - For KiloCode users: Import `codex-engineer-kilocode.yaml` - For Roo Code users: Import `codex-engineer-roocode.yaml` - For Cline users: Import `codex-engineer-cline.yaml` After importing, your main AI will automatically follow the best collaborative process of 'planning - consulting - implementing - reviewing'.
Start collaborative programming
After the configuration is complete, restart your AI client. Now, when you put forward complex programming requirements, your main AI will actively call the Codex tool to assist in completing the tasks!

Usage examples

Example 1: Requirement analysis and plan formulation
When the user puts forward a vague or complex requirement, the main AI can first ask Codex to help with detailed analysis and plan formulation.
Example 2: Securely obtain a code prototype (Diff patch)
The main AI needs to implement a function but is not sure about the best way to write it. It can ask Codex to provide a 'code blueprint' for reference.
Example 3: Code review and optimization suggestions
After the main AI completes part of the code writing, it can immediately ask Codex for a 'peer review'.

Frequently Asked Questions

Do I need to pay to use Codex MCP Go?
Why doesn't my AI assistant call Codex after configuration?
Is it safe to use Codex? Will it modify my files randomly?
Can I use it in other tools besides KiloCode/Roo Code?
What's the difference between using Codex MCP Go and directly using the Codex CLI?

Related resources

Project GitHub repository
Get the latest source code, report issues, or participate in contributions.
OpenAI Codex CLI official repository
Understand and install the core component that this tool depends on.
Model Context Protocol (MCP) official website
Understand the technical details and ecosystem of the MCP protocol.
Inspiration source: Python version codexmcp
This project was originally inspired by this. Thanks to its author.

Installation

Copy the following command to your Client for configuration
{
  "mcpServers": {
    "codex": {
      "command": "npx",
      "args": ["-y", "@zenfun510/codex-mcp-go"],
      "env": {
        "OPENAI_API_KEY": "your-api-key"
      }
    }
  }
}

{
  "mcpServers": {
    "codex": {
      "command": "/path/to/codex-mcp-go",
      "args": [],
      "env": {
        "OPENAI_API_KEY": "your-api-key"
      }
    }
  }
}
Note: Your key is sensitive information, do not share it with anyone.

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