npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

music-metadata-mcp

v2.0.1

Published

MCP server for the FreqBlog Music API — 17 tools covering audio features, recommendations, harmonic radio, DJ-format export (Rekordbox/M3U/cuesheet), country charts, lyrics, waveforms and more. Drop-in Spotify audio-features replacement for AI workflows.

Readme

music-metadata-mcp

MCP server for the FreqBlog Music API.

Lets Claude, Cursor, Windsurf, and any MCP-compatible AI assistant look up audio features, build harmonic playlists, identify recordings, fetch lyrics, render waveforms, and export DJ-ready files — by track name. No Spotify account, no ISRC required.

Tools (v2.0.0 — 17 total)

Core lookup

| Tool | Description | |------|-------------| | lookup_track | BPM, key, mood, genre, danceability, energy and 30+ more for any track. Covers 47k+ pre-analyzed tracks + 7.5M fallback via MusicBrainz | | search_tracks | Full-text search across the catalog (FTS5-backed) | | bulk_lookup | Look up up to 50 tracks in one request | | find_tracks_by_bpm | Find tracks within ±tolerance of a target BPM | | find_tracks_by_key | Find tracks by key — Camelot (8A), Open Key (1m), or name (A-Minor) |

Recommendations & DJ tools

| Tool | Description | |------|-------------| | find_similar_tracks | Cosine-similarity recommendation engine over the entire catalog | | build_radio_playlist | Harmonic + BPM-continuity DJ playlist from a seed track | | export_playlist | Generate Rekordbox XML / M3U / cuesheet from a list of track ids | | country_chart | Live national music chart for 46 countries (Apple Music RSS) | | harmonic_keys | Camelot wheel adjacency — pure logic, no quota |

Browse

| Tool | Description | |------|-------------| | find_artist_tracks | List every catalog track for an artist (paginated) | | list_genres | Distinct genre tags with track counts | | tracks_in_genre | List tracks tagged with a genre |

Per-track extras

| Tool | Description | |------|-------------| | track_embedding | 18-dim numeric vector for ML / similarity / clustering | | track_artwork_url | Resolved cover-art image URL (iTunes / Cover Art Archive) | | track_lyrics | Synced + plain lyrics via the open LRClib dataset | | track_waveform_svg | SVG waveform render of the track's 30-second preview |

Quick Start

Get a free API key at freqblog.com/music-api.html (1,000 req/month free).

Claude Desktop

Add to ~/.claude/claude_desktop_config.json:

{
  "mcpServers": {
    "music-metadata": {
      "command": "npx",
      "args": ["music-metadata-mcp", "--api-key=sk_live_YOUR_KEY_HERE"]
    }
  }
}

Cursor / Windsurf

Add to your MCP config (.cursor/mcp.json or .windsurf/mcp.json):

{
  "mcpServers": {
    "music-metadata": {
      "command": "npx",
      "args": ["music-metadata-mcp", "--api-key=sk_live_YOUR_KEY_HERE"]
    }
  }
}

Environment variable

export MUSIC_API_KEY=sk_live_YOUR_KEY_HERE
npx music-metadata-mcp

Example prompts

Once connected, you can ask your AI:

  • "What's the BPM and key of Blinding Lights by The Weeknd?"
  • "Find me 10 tracks in A-Minor around 128 BPM"
  • "What's the mood and genre of Come to Daddy by Aphex Twin?"
  • "Look up the audio features for these 5 tracks: ..."

API key tiers

| Plan | Price | Requests/month | |------|-------|---------------| | Free | £0 | 1,000 | | Hobbyist | £9.99/mo | 15,000 | | Starter | £39/mo | 150,000 | | Professional | £129/mo | 750,000 |

Get your key →

Links