codex-mcpA Model Context Protocol server for the Codex API

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Reviewed by Daniel Nikulshyn·Updated July 2026

Overview

Codex MCP Server is a Model Context Protocol server for the Codex API. It provides enriched blockchain data from Codex and can be used with any MCP-compatible client like Claude Desktop. To use the MCP Codex Server, a Codex API key is required, which can be obtained from the Codex Dashboard. The server can be run in two ways: using npm or by installing it locally. To run it using npm, the user can use the command 'npx @codex-data/codex-mcp'. For local installation, the user needs to clone the repository, install dependencies, and build the project. The MCP Codex Server can be integrated with Claude Desktop by adding a new server configuration. This can be done either by installing the server locally or by using the 'npx' command without installation. For those using Claude CLI, the MCP server can be added by running the command 'claude mcp add codex-data'.

Key features

Model Context Protocol server
Enriched blockchain data
MCP-compatible client support
stdio mode for CLI tools
Auto-reload for development

Pricing

Model: Free
Category: MCP Servers
Rating: No reviews yet

Use cases

Blockchain Data Integration

Use the Codex MCP Server to integrate enriched blockchain data into MCP-compatible clients like Claude Desktop.

Development with Claude CLI

Run the Codex MCP Server with Claude CLI to access Codex data in the command line interface.

Pros & Cons

Pros

Enriched blockchain data from Codex
Compatible with MCP clients like Claude Desktop
Easy to set up with npx

Cons

Requires a Codex API key
Limited information on scalability and performance

Reviews

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Q&A

Do I need a Codex API key to use the server, and where do I get one?

Yes, a Codex API key is mandatory. Obtain it from the Codex Dashboard; then set it in the server’s environment (`CODEX_API_KEY`) before starting the MCP server.

Asked by Noor Siddiqui · Sep 8, 2025

What is required to integrate the MCP server with Claude Desktop?

Add a new server configuration in Claude Desktop’s Developer tab. You can point it to the npx command or to a locally built script, and provide your Codex API key via the `CODEX_API_KEY` environment variable.

Asked by Grace Okafor · Aug 18, 2025

How do I start the Codex MCP Server without installing it locally?

You can run it directly with npx by executing `npx @codex-data/codex-mcp`. This starts the server in stdio mode, suitable for CLI tools, and only requires you to set the `CODEX_API_KEY` environment variable.

Asked by Yara Mansour · Jul 10, 2025