ARR-MCP

ARR-MCP is a standard MCP (Model Control Protocol) server designed to integrate with the ARR stack (Sonarr, Radarr, Prowlarr).

Overview

This MCP server provides a bridge between MCP-compatible clients and popular media management tools in the ARR stack. It implements the standard MCP protocol, enabling any MCP client to interact with these tools through a standardized interface.

Features

• Flexible MCP Server: Implements the standard MCP protocol to allow any compatible client to connect
• ARR Stack Integration:
  • Sonarr: Search and manage TV shows
  • Radarr: Search and manage movies
  • Prowlarr: Search across indexers and manage indexers
• Extensible Architecture: Easily add new tools and handlers

Installation

1. Clone the repository:

git clone https://github.com/yourusername/arr-mcp.git
cd arr-mcp

1. Build the server:

go build -o arr-mcp ./cmd/server

Usage

Running the Server

./arr-mcp

By default, the server runs on localhost:8080. You can configure it using command-line flags:

./arr-mcp --port 9000 --host 0.0.0.0

Environment Variables

Configure the connections to various services using environment variables:

export SONARR_URL="http://localhost:8989"
export SONARR_API_KEY="your-sonarr-api-key"
export RADARR_URL="http://localhost:7878"
export RADARR_API_KEY="your-radarr-api-key"
export PROWLARR_URL="http://localhost:9696"
export PROWLARR_API_KEY="your-prowlarr-api-key"

Command-line Options

• --port: Server port (default: 8080)
• --host: Host to bind to (default: localhost)
• --log-level: Logging level (default: info)
• --sonarr-url: Sonarr API URL
• --sonarr-api-key: Sonarr API key
• --radarr-url: Radarr API URL
• --radarr-api-key: Radarr API key
• --prowlarr-url: Prowlarr API URL
• --prowlarr-api-key: Prowlarr API key

Configuring MCP Clients to Use This Server

To use this MCP server with any MCP-compatible client, configure the client to connect to:

http://localhost:8080

The server implements the standard MCP protocol endpoints required by compliant clients.

Available Endpoints

• GET /health: Health check endpoint
• POST /v1/run: MCP run endpoint for executing tools
• GET /v1/tools: List available tools

Available Tools

Depending on your configuration, the following tools will be available:

• SonarrSearch: Search for TV shows in Sonarr
• SonarrList: List TV shows in Sonarr
• RadarrSearch: Search for movies in Radarr
• RadarrList: List movies in Radarr
• ProwlarrSearch: Search for content using Prowlarr indexers
• ProwlarrIndexers: List Prowlarr indexers

Tool Usage Examples

SonarrSearch

{
  "tool_name": "SonarrSearch",
  "input": {
    "query": "Breaking Bad"
  }
}

RadarrSearch

{
  "tool_name": "RadarrSearch",
  "input": {
    "query": "Inception"
  }
}

ProwlarrSearch

{
  "tool_name": "ProwlarrSearch",
  "input": {
    "query": "ubuntu 22.04",
    "categories": [5030, 5040]
  }
}

Development

Project Structure

• cmd/server/: Contains the main application entry point
• pkg/api/: MCP protocol definitions and interfaces
• pkg/arr/: ARR stack integration (Sonarr, Radarr, Prowlarr)
• pkg/server/: MCP server implementation

Adding New Tools

To add a new tool to the server:

1. Create a handler that implements the api.Handler interface
2. Register the tool and handler in the setupServer function in main.go

Example:

// Create a new handler
type MyNewHandler struct {
    // Dependencies here
}

// Implement the HandleRequest method
func (h *MyNewHandler) HandleRequest(req api.MCPRequest) (interface{}, error) {
    // Handle the request
    return result, nil
}

// In setupServer function
mcpServer.RegisterTool(
    api.ToolDefinition{
        Name:        "MyNewTool",
        Description: "Description of my new tool",
        Parameters: map[string]interface{}{
            "param1": map[string]interface{}{
                "type":        "string",
                "description": "Description of parameter",
            },
        },
    },
    &MyNewHandler{},
)

Building from Source

go mod tidy
go build -o arr-mcp ./cmd/server

License

MIT License