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MCP Integration

Automate MCP server integration with Codex plugins using plugin.json and environment variables.

Updated Apr 3, 2026
Search Tags:#authentication#MCP#Codex#plugin#server configuration#service integration
One-click install
npx skills add https://github.com/jmolz/m0lz.02 --skill mcp-integration-jmolz
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: MCP Integration
Source: https://github.com/jmolz/m0lz.02/tree/main/.agents/skills/mcp-integration
Command: npx skills add https://github.com/jmolz/m0lz.02 --skill mcp-integration-jmolz

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

Integrating with external services and APIs can be complex and error-prone. This skill simplifies the process of setting up and configuring MCP servers within Codex plugins, enabling seamless integration of external tools and services.

Core Features & Use Cases

  • Comprehensive Integration Guide: Offers detailed guidance on setting up and configuring MCP servers.
  • Multiple Server Configuration Methods: Supports both .mcp.json and plugin.json configurations for MCP servers.
  • MCP Server Types: Covers standardio, SSE, HTTP, and WebSocket server configurations.
  • Authentication Patterns: Provides best practices and examples for OAuth, token-based, and environment variable authentication.
  • Integration Patterns: Describes different patterns for integrating MCP into plugins, such as Simple Tool Wrapper, Autonomous Agent, and Multi-Server Plugin.
  • Security Best Practices: Includes guidelines for using HTTPS/WSS, managing tokens, and handling permissions.

Quick Start

Set up your MCP server and configure it within your Codex plugin. Use the /mcp command to verify the server configuration and availability.

Frequently Asked Questions about MCP Integration

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I configure an MCP server in a Codex plugin?▼

You can configure an MCP server in a Codex plugin by defining the connection settings within either a `.mcp.json` file or directly inside the `plugin.json` file. This skill automates the setup process for connecting external services and APIs.

What types of MCP server configurations does Codex support?▼

Codex MCP server configurations support standardio, SSE, HTTP, and WebSocket server types. This skill provides detailed guidance on setting up these various server configurations for seamless external tool and service integration.

How do I handle OAuth and authentication when integrating external APIs with MCP?▼

To handle OAuth and authentication for external APIs, MCP integration utilizes environment variables and token-based authentication patterns. This skill provides best practices and examples for securely managing tokens and handling permissions.

What is the best way to structure a plugin for multiple MCP servers?▼

The best way to structure a plugin for multiple MCP servers is using the Multi-Server Plugin integration pattern. This skill outlines various integration patterns, including Simple Tool Wrapper and Autonomous Agent, to structure your tools effectively.

How can I verify if my MCP server is available in a Codex plugin?▼

You can verify if your MCP server is available and correctly configured in a Codex plugin by running the `/mcp` command. This validates the server configuration and checks the availability of the connected external services.

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