Codex MCP Server

An MCP server that provides enriched blockchain data from Codex. This server can be used with any MCP-compatible client like Claude Desktop.

Installation

# Clone the repository
git clone https://github.com/codex-data/codex-mcp.git
cd codex-mcp

# Install dependencies
pnpm install

# Build the project
pnpm build

Usage

To use the MCP Codex Server, you need to have a Codex API key. You can get your key from the Codex Dashboard.

Using npx (No Installation Required)

You can run the MCP Codex Server directly without installation using npx:

# Run the server in stdio mode (for CLI tools)
npx @codex-data/codex-mcp

Running the Server Locally

Start the server using stdio (for embedding in CLI tools):

pnpm start

For development with auto-reload:

pnpm dev

Integration with Claude Desktop

1. Open Claude Desktop settings
2. Go to the Developer tab and click “Edit Config”
3. Add a new server configuration:

No installation:

{
  "mcpServers": {
    "codex-data": {
      "command": "npx",
      "args": ["-y", "@codex-data/codex-mcp"],
      "env": {
        "CODEX_API_KEY": ""
      }
    }
  }
}

Local installation:

{
  "mcpServers": {
    "codex-data": {
      "command": "node",
      "args": ["/path/to/codex-mcp/build/index.js"],
      "env": {
        "CODEX_API_KEY": ""
      }
    }
  }
}

4. Replace /path/to/codex-mcp with the actual path to your installation
5. Replace `` with your actual Codex API key

Connecting using Claude CLI

If you’re using Claude CLI:

# Add the MCP server
claude mcp add codex-data -e CODEX_API_KEY= npx @codex-data/codex-mcp

# Start Claude with the MCP server enabled
claude

License

ISC