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Search Lightning FM's Nostr music catalog, look up artists, and check what's live now.
About
Search Lightning FM's Nostr music catalog, look up artists, and check what's live now.
Security Report
This is a well-structured MCP server for querying a Nostr-based music catalog with no authentication required (by design). The codebase is clean with proper input validation, event signature verification, and safe credential handling via environment variables. Permissions are appropriately scoped to read-only network access and file operations, matching the server's read-only catalog query purpose. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 1 high severity). Package verification found 1 issue.
7 files analyzed · 7 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: LFM_NOSTR_RELAYS
Environment variable: LFM_BLOSSOM_URL
Environment variable: LFM_CACHE_TTL_MS
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"fm-lightning-lightning-fm-mcp": {
"env": {
"LFM_BLOSSOM_URL": "your-lfm-blossom-url-here",
"LFM_CACHE_TTL_MS": "your-lfm-cache-ttl-ms-here",
"LFM_NOSTR_RELAYS": "your-lfm-nostr-relays-here"
},
"args": [
"-y",
"lightning-fm-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Lightning FM :: MCP Server
An MCP server for Lightning FM's music catalog — search tracks, look up artists, and check what's live on the station, all from an agent.
There is no separate agent API. This server reads exactly what a human client reads: kind 31337 track events and kind 0 profiles from public Nostr relays, audio and images from the public Blossom server, and the kind 30311 live activity event the station publishes on every track change. Every track is signed by the artist's own key — this is the canonical catalog, not a curated subset the platform maintains for agents.
Use it
Add it to your MCP client's server config. For Claude Code or Claude Desktop:
{
"mcpServers": {
"lightning-fm": {
"command": "npx",
"args": ["-y", "lightning-fm-mcp"]
}
}
}
No install, no API key, no account. It talks to relay.lightning.fm and media.lightning.fm by default — see Configuration to point it elsewhere.
Tools
search_catalog— free-text search plus genre/tag filters over the full catalog. Leave every filter empty to browse newest-first.get_artist— look up an artist by display name (partial match), hex pubkey, or npub. Returns their profile and full discography.get_now_playing— what's currently on air, and the stream URL.
Configuration
All environment variables are optional — defaults point at production. Nothing here is a secret; this server is read-only and never signs or publishes anything.
| Variable | Default | What it does |
|---|---|---|
LFM_NOSTR_RELAYS | wss://relay.lightning.fm | Comma-separated relay URLs to query. Only add a relay here if it gates writes the way relay.lightning.fm does — kind 31337 isn't exclusive to Lightning FM, and an unrestricted public relay hands back every other app's tracks too. |
LFM_BLOSSOM_URL | https://media.lightning.fm | Blossom server audio/image hashes resolve against. |
LFM_CACHE_TTL_MS | 60000 | How long a fetched snapshot is reused before the next tool call re-queries the relays. |
Development
npm install
npm run dev # runs src/index.ts directly via tsx
npm run build # tsc -> dist/
src/nostr/track.ts mirrors the kind 31337 parsing in station-server/src/catalog/track.ts (private repo) and app-desktop/src-tauri/src/relay.rs. All three must agree on tag names — this is the platform's public wire format, documented in full at lightning.fm/interop.
License
MIT
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