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Ask Codex MCP Server

local only

Ask Codex runs on your own machine — the client starts it, so there is no endpoint to ping. 597 installs a week from npm. Last commit 16 Sep 2026.

Bridge Claude with OpenAI Codex CLI for AI-to-AI collaboration, code review, and second opinions

Installs per day peak 362 · avg 47 · +351% w/w
a month agotoday
597
Installs / week
npm · @ask-llm/codex-mcp
18
Stars
10 open issues
16 Sep 2026
Last commit
0 releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 19 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    const childProcess = spawn(command, safeArgs, {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add ask-codex -- npx -y @ask-llm/codex-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "ask-codex": {
      "args": [
        "-y",
        "@ask-llm/codex-mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.ask-codex]
command = "npx"
args = ["-y", "@ask-llm/codex-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "ask-codex": {
      "args": [
        "-y",
        "@ask-llm/codex-mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "ask-codex": {
      "args": [
        "-y",
        "@ask-llm/codex-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: GMCPT_TIMEOUT_MS (Timeout for Codex CLI execution in milliseconds (default: 300000 = 5 minutes)), GMCPT_LOG_LEVEL (Log verbosity: debug, info, warn, error (default: warn)). The author declared them in the registry entry; get the values from the project itself.

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Ask Codex — questions

Answers built from our own checks of this server.

Why is there no uptime for Ask Codex?
Ask Codex runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @ask-llm/codex-mcp was installed 597 times last week.
How do I connect Ask Codex?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @ask-llm/codex-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Ask Codex?
The npm package @ask-llm/codex-mcp was installed 597 times in the last week. Week over week that is +351%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Ask Codex open source?
Yes — it is published under the MIT licence, written in TypeScript, 18 stars on GitHub and 10 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.