MCP Actions Adapter

Name: MCP Actions Adapter
Author: SecretiveShell

@SecretiveShell

Repository

About MCP Actions Adapter

A simple adapter to convert a MCP server to a GPT actions compatible API

#mcp #gpt #adapter

Basic information

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "MCP-actions-adapter": {
      "command": "uv",
      "args": [
        "tool",
        "install",
        "mcp-actions-adapter"
      ]
    }
  }
}

Tools

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Overview

What is MCP Actions Adapter?

MCP Actions Adapter is a tool that converts any MCP (Model Context Protocol) server into an API compatible with OpenAI GPT Actions. It is designed for developers who want to expose MCP server tools as custom actions in OpenAI's GPT platform.

How to use MCP Actions Adapter?

Install with uv tool install mcp-actions-adapter. Create a config.json file following the same format used by Claude Desktop (an example is provided). Start a Cloudflare tunnel with cloudflared tunnel --url http://localhost:8000, then run the adapter with uv run mcp-actions-adapter -c config.json --url ${CF_TUNNEL_URL}. Finally, open the Custom GPT builder and paste the contents of http://localhost:8000/openapi.json into the schema box.

Key features of MCP Actions Adapter

Converts an MCP server to a GPT Actions compatible API
Uses the same config.json format as Claude Desktop
Provides a live OpenAPI schema at /openapi.json
Requires only a Cloudflare tunnel for public access
Licensed under MIT

Use cases of MCP Actions Adapter

Expose MCP server tools as custom actions in OpenAI GPTs
Bridge existing MCP tools with OpenAI’s GPT Actions framework
Quickly prototype GPT custom actions without writing a separate API

FAQ from MCP Actions Adapter

What does MCP Actions Adapter do?

It converts an MCP server to a GPT Actions compatible API, allowing MCP tools to be used as custom actions in OpenAI's GPT platform.

How do I install MCP Actions Adapter?

Install it using uv tool install mcp-actions-adapter. Ensure you have uv and cloudflared available on your system.

How do I configure MCP Actions Adapter?

Create a config.json file with the same structure used by Claude Desktop. An example config file is provided in the repository.

How do I make the adapter publicly accessible?

Start a Cloudflare tunnel pointing to http://localhost:8000 using the command cloudflared tunnel --url http://localhost:8000, then run the adapter with the tunnel URL passed via the --url parameter.

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