Rust MCP and CLI server for Sonarr, Radarr, Prowlarr, Plex, Jellyfin, and download clients.
Connect Yarr MCP to Claude, Cursor or any other MCP client and it stops being a tab you switch to. Rust MCP and CLI server for Sonarr, Radarr, Prowlarr, Plex, Jellyfin, and download clients. The yarr mcp mcp server is what makes that connection.
MCP server and CLI for self-hosted media fleets: Sonarr, Radarr, Prowlarr, Bazarr, Tautulli, Overseerr, SABnzbd, qBittorrent, Plex, Jellyfin, and Tracearr.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
stdio — stdio is the preferred local MCP transport. It starts yarr mcp on demand and does not require binding a local HTTP portConfiguration is passed through the environment: YARR_SERVICES, YARR_SONARR_URL, YARR_SONARR_API_KEY, RUST_LOG, YARR_MCP_TOKEN, YARR_MCP_HOST, YARR_RADARR_URL, YARR_RADARR_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Yarr MCP's toolset — stdio — is a fair guide to whether it matches your workflow. It is maintained by ai.dinglebear; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| stdio | stdio is the preferred local MCP transport. It starts yarr mcp on demand and does not require binding a local HTTP port. |
```json
{
"mcpServers": {
"yarr": {
"url": "http://127.0.0.1:40070/mcp",
"headers": {
"Authorization": "Bearer ${YARR_MCP_TOKEN}"
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| YARR_SERVICES | Configuration value read at startup. | Optional |
| YARR_SONARR_URL | Endpoint or connection string the server talks to. | Yes |
| YARR_SONARR_API_KEY | Credential the server authenticates with. | Yes |
| RUST_LOG | Configuration value read at startup. | Optional |
| YARR_MCP_TOKEN | Credential the server authenticates with. | Yes |
| YARR_MCP_HOST | Endpoint or connection string the server talks to. | Optional |
| YARR_RADARR_URL | Endpoint or connection string the server talks to. | Yes |
| YARR_RADARR_API_KEY | Credential the server authenticates with. | Yes |
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