mediafleet

mediafleet

mediafleet puts a whole self-hosted media stack behind a single MCP tool. Instead of one tool per operation per service, the server exposes one Code Mode tool, yarr: you hand it a JavaScript async arrow function, and it runs in a sandbox whose globals are callables for the media services you configured — Sonarr, Radarr, Prowlarr, Tautulli, Overseerr, Bazarr, SABnzbd, qBittorrent, Plex and Jellyfin. A single call can query three services, combine the answers, and return one composed result.

This package is a clean-room rebuild of that documented surface. It implements the full documented core: the one tool, the sandbox globals, the action dispatch, and the snippet store described below.

Configuration

Services are opted in through the environment:

Variable	Meaning
YARR_SERVICES	Comma-separated list of configured services. When unset, any service with a URL variable set counts as configured.
YARR_<SERVICE>_URL	Base URL, e.g. YARR_SONARR_URL=http://localhost:8989.
YARR_<SERVICE>_API_KEY	API key, sent as the X-Api-Key header.
YARR_PLEX_TOKEN	Plex's credential, sent as the X-Plex-Token header.

Only configured services appear in the sandbox. Unconfigured names are simply not defined there, and api.<service> is absent for them too.

The sandbox

The code argument is an async arrow function. It is invoked with no argument (snippet runs pass their input instead; see below) and its return value — normalised to plain JSON-shaped data — becomes the tool result, alongside any artifacts written and any console lines captured during the run.

Globals available to the code:

• Per-service callables — sonarr, radarr, … Calling one performs a GET (await sonarr("/api/v3/series")); .get, .post, .put and .delete(path, body) are attached, plus .status(), which probes the service's conventional status endpoint and reports {service, ok, status} or {service, ok: false, error}.
• api.<service>.get/post/put/delete(path, body) — the explicit HTTP surface for each configured service.
• callTool(action, params) — dispatch for the documented actions. Generic: service_status ({service?}), api_get, api_post, api_put, api_delete (each {service, path, body?}) and help. Codemode: codemode ({code, input?} runs nested code, otherwise returns a summary), op (one of {path} to describe, {name, input?} to run a snippet, {code, input?} to run code), snippet_list, snippet_save ({name, code}), snippet_run ({name, input?}) and snippet_delete ({name}).
• codemode.search(query) — substring-search the catalogue of services, api paths, actions and helpers.
• codemode.describe(path) — return the catalogue entry for one path, e.g. codemode.describe("api.sonarr.get").
• codemode.snippets() — list the snippets in the store.
• codemode.run(name, input) — run a saved snippet; its function receives input as its argument.
• writeArtifact(name, content) — store a named text artifact; everything written during a run is returned with that run's result.
• console.log/info/warn/error — captured and returned as the run's logs, never written to the server's stdout.

Snippets live in a per-process in-memory store: they persist across calls for the life of the server process and are gone when it exits.

Two honest limits: the sandbox is node:vm, which isolates globals (there is no process or require inside) but is not a hardened security boundary; and destructive verbs are not specially gated — if the code issues a DELETE, mediafleet executes it, exactly as written.

Install

npx @reneturcios/mediafleet yarr '{"code":"async () => { return await callTool(\"help\"); }"}'

Or run the container image:

docker run -i ghcr.io/cloudcorprecords/mediafleet

The container defaults to the MCP server. Pass CLI arguments to use it as a CLI instead. Remember to pass the YARR_* environment variables to whichever process runs the server.

CLI

mediafleet yarr '{"code":"async () => { return await api.sonarr.get(\"/api/v3/system/status\"); }"}'
mediafleet yarr '{"code":"async () => { const s = await callTool(\"service_status\"); return s; }"}'
mediafleet --version
mediafleet mcp

Exit codes: 0 on success, 1 on an execution or validation error, 2 on a usage error.

MCP client config

{
  "mcpServers": {
    "mediafleet": {
      "command": "npx",
      "args": ["-y", "@reneturcios/mediafleet", "mcp"],
      "env": {
        "YARR_SERVICES": "sonarr,radarr,plex",
        "YARR_SONARR_URL": "http://localhost:8989",
        "YARR_SONARR_API_KEY": "…",
        "YARR_RADARR_URL": "http://localhost:7878",
        "YARR_RADARR_API_KEY": "…",
        "YARR_PLEX_URL": "http://localhost:32400",
        "YARR_PLEX_TOKEN": "…"
      }
    }
  }
}

MCP tools

Tool	Arguments	What it does
yarr	code: string (required)	Execute the async arrow function in the Code Mode sandbox and return {result, artifacts, logs}.

Development

npm install
npm run build   # tsc -> dist/
npm test        # tsx --test test/*.test.ts — fake executor and fake fetch only, no network
npm run dev     # tsx src/cli.ts

All service traffic goes through a single injectable executor function, and the default executor's HTTP goes through an injectable fetch, which is what lets the test suite exercise the whole surface — URL and header construction included — without a live service.

License

MIT — see LICENSE. Copyright (c) 2026 Rene Turcios.