Gaia MCP Server

An MCP (Model Context Protocol) server implementation for ProtoGaia, supporting both stdio and SSE (Server-Sent Events) communication methods.

Table of Contents

• Introduction
• Installation
• Usage
  • Using Stdio Method
  • Using SSE Method
• Understanding MCP
• API Endpoints
• Supported Tools
• Notice

Introduction

This package contains a TypeScript implementation of an MCP server for ProtoGaia. It provides a standardized way for LLMs (Large Language Models) to communicate with external tools and services using the Model Context Protocol.

Installation

You can use Gaia MCP Server in multiple ways:

Using with npx (No Installation)

Run the server directly using npx without installing:

# Run in SSE mode
npx @ather-mcp/gaia-mcp-server sse

# Run in stdio mode
npx @ather-mcp/gaia-mcp-server stdio --api-key=your-api-key

Global Installation

Install the package globally to run from anywhere:

npm install -g @ather-mcp/gaia-mcp-server

Then run it from any terminal:

# Run in SSE mode
gaia-mcp-server sse

# Run in stdio mode
gaia-mcp-server stdio --api-key=your-api-key

Usage

The server can be run in two modes: stdio or SSE. You can choose which mode to run using the command-line interface.

Using Stdio Method

The stdio method is useful for direct communication with the server via standard input/output streams, typically used when integrating with CLI tools or developing locally.

To start the server in stdio mode:

# Using npx
npx @ather-mcp/gaia-mcp-server stdio --api-key=your-api-key

# Using globally installed package
gaia-mcp-server stdio --api-key=your-api-key

You can also specify a custom API URL:

npx @ather-mcp/gaia-mcp-server stdio --api-key=your-api-key --api-url=https://your-custom-api-url

With the stdio method, communication with the server happens through stdin/stdout, following the MCP protocol format.

Example of sending a message through stdio:

{ "type": "message", "data": { "content": "Your message content here" } }

Using SSE Method

The SSE method allows for server-sent events communication over HTTP, making it suitable for web applications.

To start the server in SSE mode:

# Using npx
npx @ather-mcp/gaia-mcp-server sse

# Using globally installed package
gaia-mcp-server sse

The server will start on the port specified in your .env file (default: 3000).

Connecting to the SSE Server

To establish an SSE connection:

1. Create an EventSource connection to /sse endpoint with your Gaia's account API Key. More information about creating your API key can be found at here.
2. Send messages via POST requests to /messages endpoint

Client-side JavaScript example:

// Establish SSE connection
const eventSource = new EventSource('http://localhost:3000/sse?apiKey=your-gaia-account-api-key');
const sessionId = ''; // Will be populated from the first message

// Listen for messages
eventSource.onmessage = event => {
  const data = JSON.parse(event.data);

  // Store session ID from first message
  if (data.sessionId && !sessionId) {
    sessionId = data.sessionId;
  }

  console.log('Received:', data);
};

// Send a message
async function sendMessage(content) {
  await fetch('http://localhost:3000/messages', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      sessionId,
      message: {
        type: 'message',
        data: { content },
      },
    }),
  });
}

Understanding MCP

The Model Context Protocol (MCP) is a standardized communication protocol that enables LLMs to interact with external tools and services. More information can be found at modelcontextprotocol.io.

Key MCP concepts:

• Messages: The basic unit of communication in the protocol
• Tools: Functions that can be called by the model
• Transport Layers: Methods of communication (stdio, SSE, etc.)
• Sessions: Stateful interactions between the model and server

This server implementation uses the @modelcontextprotocol/sdk package to handle the protocol details.

API Endpoints

When running in SSE mode, the following endpoints are available:

• GET /sse: Establishes an SSE connection
• POST /messages: Sends messages to the server
• GET /health: Health check endpoint
• GET /: Basic information about the server

Supported Tools

The Gaia MCP Server provides several AI image generation and manipulation tools that can be called by LLMs:

• upload-image: Upload images to the Gaia platform from URLs
• create-style: Create a new style in the Gaia platform using provided images
• generate-image: Generate images with Protogaia based on text prompts
• remix: Create new variations of an existing image
• face-enhancer: Enhance face details in an existing image
• upscaler: Enhance the resolution quality of image

Each tool is registered with the MCP server and can be invoked according to the Model Context Protocol standard.

License

Apache License 2.0

Notice

• To utilize the generative image functionality, the user must possess GAIA credits. You can check your remaining credits and purchase more here.