spotify-cli

A small CLI for building Spotify playlists and controlling Spotify Connect playback. Designed to be driven by a Hermes agent, but works fine standalone.

Every command emits a single JSON object/array on stdout. Errors land on stderr in a {"error": {...}} envelope with a non-zero exit code.

Install

npm install -g spotify-cli

Or from source:

git clone <this-repo>
cd spotify-cli && npm install && npm run build && npm link

Requires Node ≥ 20.

Authenticate

1. Register an app at https://developer.spotify.com/dashboard.
2. In the app settings, add http://127.0.0.1/callback as a redirect URI. (The CLI uses an ephemeral loopback port — Spotify accepts any port for 127.0.0.1 redirects, but the URI must be registered.)
3. Export your client ID and run auth login:

export SPOTIFY_CLIENT_ID=xxxxxxxxxxxxxxxxxxxxxxxx
spotify-cli auth login

The token is cached at ~/.config/spotify-cli/token.json (mode 0600) and auto-refreshed before expiry.

Examples

# Search and build
spotify-cli search "miles davis" --type artist
spotify-cli playlist create --name "Tonight"
spotify-cli playlist add 7vxxx... spotify:track:aaa spotify:track:bbb

# Connect playback
spotify-cli devices list
spotify-cli playback transfer <deviceId> --play
spotify-cli playback play --context-uri spotify:playlist:7vxxx...
spotify-cli playback volume 30

See spotify-cli --help for the full surface.

Rate limiting

Spotify enforces a per-app rolling 30-second quota. The CLI:

• Serializes outbound requests within a process and inserts a minimum inter-request gap (default 250 ms; override with SPOTIFY_CLI_MIN_INTERVAL_MS).
• Honors Retry-After on 429 responses with jittered retries.
• Backs off exponentially on 5xx (max 3 attempts).
• Refreshes the access token automatically on 401 (once per request).

If you're driving this from an agent, never issue spotify-cli calls in parallel — the CLI's pacer only protects against intra-process bursts; the quota is shared across all processes using the same app.

Hermes skill

The skill/ directory packages this CLI as a Hermes agent skill. See skill/SKILL.md. Publish with:

hermes skills publish skill --to github --repo <owner>/<repo>

Development

npm install
npm test          # 57 unit/integration tests, no network
npm run build
npx tsx src/index.ts --help

License

MIT