Arrstack

An MCP server that gives AI assistants control over your Sonarr, Radarr, Prowlarr, qBittorrent, and Jellyfin homelab media stack.

Works with Claude Desktop, Cursor, VS Code Copilot, OpenClaw, and any other MCP-compatible client.

Demo

Features

Service	Tools
Sonarr	List series, search & add shows, upcoming episodes, download queue
Radarr	List movies, search & add movies, download queue
Prowlarr	List/test indexers, search releases, health check
qBittorrent	List/pause/resume/delete torrents, add magnets, transfer stats
Jellyfin	List libraries, recent additions, system info

Only configure the services you use — unconfigured services are gracefully skipped.

Quick Start

Option 1: Claude Desktop / Cursor / VS Code (stdio)

1. Install dependencies:

   pip install "mcp[cli]>=1.9.0" httpx
   

2. Add to your MCP client config (e.g. claude_desktop_config.json):

   {
     "mcpServers": {
       "arrstack": {
         "command": "python",
         "args": ["/path/to/arrstack-mcp/server.py"],
         "env": {
           "SONARR_URL": "http://localhost:8989",
           "SONARR_API_KEY": "your-api-key",
           "RADARR_URL": "http://localhost:7878",
           "RADARR_API_KEY": "your-api-key",
           "QBT_URL": "http://localhost:8080",
           "QBT_USER": "admin",
           "QBT_PASS": "your-password",
           "JELLYFIN_URL": "http://localhost:8096"
         }
       }
     }
   }
   

3. Restart your MCP client. Done!

Option 2: Docker (HTTP transport)

For remote setups or when running alongside your *arr stack:

git clone https://github.com/ct4nk3r/arrstack-mcp.git
cd arrstack-mcp
cp .env.example .env
# Edit .env with your service URLs and API keys
docker compose up -d

The server runs on port 8000 with Streamable HTTP transport.

Connect to OpenClaw

openclaw mcp set arrstack '{"url":"http://arrstack-mcp:8000/mcp","transport":"streamable-http"}'

Connect to other HTTP MCP clients

Point your client to http://<host>:8000/mcp using Streamable HTTP transport.

Option 3: Docker on the same network as your *arr stack

If your media services run in Docker, add arrstack-mcp to the same network:

services:
  arrstack-mcp:
    build: .
    container_name: arrstack-mcp
    ports:
      - "8000:8000"
    environment:
      - SONARR_URL=http://sonarr:8989
      - SONARR_API_KEY=your-key
      - RADARR_URL=http://radarr:7878
      - RADARR_API_KEY=your-key
      - QBT_URL=http://qbittorrent:8080
      - QBT_USER=admin
      - QBT_PASS=your-password
      - JELLYFIN_URL=http://jellyfin:8096
    networks:
      - your-media-network

Configuration

All configuration is done via environment variables:

Variable	Required	Description
SONARR_URL	No	Sonarr base URL (e.g. http://localhost:8989)
SONARR_API_KEY	If Sonarr	Sonarr API key (Settings → General)
RADARR_URL	No	Radarr base URL (e.g. http://localhost:7878)
RADARR_API_KEY	If Radarr	Radarr API key (Settings → General)
QBT_URL	No	qBittorrent Web UI URL (e.g. http://localhost:8080)
QBT_USER	If qBt	qBittorrent username (default: admin)
QBT_PASS	If qBt	qBittorrent password
JELLYFIN_URL	No	Jellyfin base URL (e.g. http://localhost:8096)
JELLYFIN_API_KEY	No	Jellyfin API key (optional, for authenticated endpoints)
PROWLARR_URL	No	Prowlarr base URL (e.g. http://localhost:9696)
PROWLARR_API_KEY	If Prowlarr	Prowlarr API key (Settings → General)

Available Tools

Sonarr (TV Shows)

Tool	Description
sonarr_list_series	List all series with episode counts and disk usage
sonarr_get_series	Get detailed info about a specific series
sonarr_search	Search for new shows to add
sonarr_add_series	Add a show by TVDB ID
sonarr_upcoming	Show upcoming episodes
sonarr_queue	Show current download queue

Radarr (Movies)

Tool	Description
radarr_list_movies	List all movies with download status
radarr_get_movie	Get detailed info about a specific movie
radarr_search	Search for new movies to add
radarr_add_movie	Add a movie by TMDB ID
radarr_queue	Show current download queue

Prowlarr (Indexers)

Tool	Description
prowlarr_list_indexers	List all indexers with status
prowlarr_test_indexer	Test a specific indexer connection
prowlarr_test_all_indexers	Test all enabled indexers
prowlarr_search	Search across indexers for releases
prowlarr_health	Check system health warnings

qBittorrent (Downloads)

Tool	Description
qbt_list_torrents	List torrents with progress and speed
qbt_torrent_details	Get detailed torrent info
qbt_add_magnet	Add a magnet link
qbt_pause	Pause a torrent
qbt_resume	Resume a torrent
qbt_delete	Delete a torrent (optionally with files)
qbt_transfer_info	Global transfer statistics

Jellyfin (Media Server)

Tool	Description
jellyfin_libraries	List media libraries
jellyfin_recent	Recently added items
jellyfin_system_info	Server version and system info

Transport Options

# stdio (default) — for Claude Desktop, Cursor, VS Code
python server.py

# Streamable HTTP — for Docker / remote
python server.py --transport streamable-http --port 8000

# SSE — legacy HTTP transport
python server.py --transport sse --port 8000

Finding Your API Keys

• Sonarr: Settings → General → API Key
• Radarr: Settings → General → API Key
• Prowlarr: Settings → General → API Key
• qBittorrent: Settings → Web UI → Authentication
• Jellyfin: Dashboard → API Keys → Add

License

MIT