Houndarr
Auto re-searches your *arr library's missing and below-cutoff items in slow, polite batches.
Houndarr plugs into your existing Radarr, Sonarr, Lidarr, Readarr, or Whisparr stack and does what their built-in "Search All Missing" button doesn't: works through missing and below-quality-cutoff items on a schedule, in small batches with configurable sleep intervals, per-item cooldowns, and hourly API caps, so it doesn't overwhelm your indexers. It runs as a single Docker container with a SQLite database, encrypts API keys at rest (Fernet AES-128-CBC + HMAC-SHA256), and makes zero outbound connections beyond your own *arr instances. It's deliberately narrow: no download-client integration, no indexer management, no request workflows, and no multi-user support.
What holds up
- +Zero telemetry — the only network traffic goes to your own *arr instances, nothing to a developer server.
- +API keys encrypted at rest (Fernet AES-128-CBC + HMAC-SHA256) and never sent back to the browser.
- +Per-instance batch size, cooldown, and hourly cap controls, so you set exactly how hard it hits indexers.
Mind the limits
- −Single admin user only — no multi-user support if more than one person needs access.
- −Doesn't touch downloads, indexers, or requests — you still need your existing *arr and Overseerr setup.
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