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An MCP server that provides seamless access to a user's Last.fm listening data and music information via AI assistants like Claude.

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# Last.fm MCP Server

A [Model Context Protocol](https://modelcontextprotocol.io/) (MCP) server for Last.fm. Gives AI assistants access to your listening history, music discovery, and detailed track/artist/album information.

Runs on Cloudflare Workers with OAuth 2.0 authentication. Public tools (track info, artist info, similar artists) work without signing in -- connect your Last.fm account to access personal listening data.

## Quick start

### Claude.ai / Claude Desktop

1. Open **Settings** -> **Connectors** -> **Add Custom Connector**
2. Enter `https://lastfm-mcp.com/mcp`
3. Sign in to Last.fm when prompted

### Claude Code

```bash
claude mcp add --transport http lastfm "https://lastfm-mcp.com/mcp"
```

### Windsurf

Add to `~/.codeium/windsurf/mcp_config.json`:

```json
{
  "mcpServers": {
    "lastfm": {
      "serverUrl": "https://lastfm-mcp.com/mcp"
    }
  }
}
```

### Other MCP clients

For clients that don't support remote servers directly (Continue.dev, Zed, etc.), use `mcp-remote`:

```json
{
  "mcpServers": {
    "lastfm": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://lastfm-mcp.com/mcp"]
    }
  }
}
```

### MCP Inspector

```bash
npx @modelcontextprotocol/inspector https://lastfm-mcp.com/mcp
```

## Authentication

The server uses OAuth 2.0. When you connect from a supported client, your browser opens to Last.fm to authorize access. Tokens persist across sessions.

Public tools work without signing in. You only need to connect your account for personal listening data.

## Available tools

### Public tools

| Tool | Description |
| ---- | ----------- |
| `get_track_info` | Detailed information about a track |
| `get_artist_info` | Artist information and bio |
| `get_album_info` | Album details and track listing |
| `get_artist_top_tracks` | An artist's globally most-played tracks |
| `get_artist_top_albums` | An artist's globally most-played albums |
| `get_similar_artists` | Artists similar to a given artist |
| `get_similar_tracks` | Tracks similar to a given track |
| `ping` | Test connectivity |
| `server_info` | Server status and capabilities |
| `lastfm_auth_status` | Check authentication status |

### Personal tools (requires sign-in)

| Tool | Description |
| ---- | ----------- |
| `get_recent_tracks` | Recent listening history (paginated) |
| `get_top_artists` | Top artists by time period |
| `get_top_albums` | Top albums by time period |
| `get_top_tracks` | Top tracks by time period |
| `get_loved_tracks` | Loved/favorited tracks |
| `get_user_info` | Last.fm profile information |
| `get_listening_stats` | Listening statistics |
| `get_music_recommendations` | Personalized recommendations |

### Temporal queries (requires sign-in)

| Tool | Description |
| ---- | ----------- |
| `get_weekly_chart_list` | Available historical time periods |
| `get_weekly_artist_chart` | Artist charts for a specific time period |
| `get_weekly_track_chart` | Track charts for a specific time period |

Good for questions like "when did I start listening to Led Zeppelin?" or "what was I into last March?"

## Resources

The server exposes MCP resource URIs:

```
lastfm://user/{username}/recent          # Recent tracks
lastfm://user/{username}/top-artists     # Top artists
lastfm://user/{username}/top-albums      # Top albums
lastfm://user/{username}/loved           # Loved tracks
lastfm://user/{username}/profile         # User profile
lastfm://track/{artist}/{track}          # Track info
lastfm://artist/{artist}                 # Artist info
lastfm://album/{artist}/{album}          # Album info
lastfm://artist/{artist}/similar         # Similar artists
lastfm://track/{artist}/{track}/similar  # Similar tracks
```

## Prompts

| Prompt | Description | Arguments |
| ------ | ----------- | --------- |
| `listening_insights` | Analyze listening habits and patterns | `username`, `period?` |
| `music_discovery` | Discover music based on listening history | `username`, `genre?` |
| `track_analysis` | Detailed analysis of a track | `artist`, `track` |
| `album_analysis` | Detailed analysis of an album | `artist`, `album` |
| `artist_analysis` | Detailed analysis of an artist | `artist` |
| `listening_habits` | Summarize listening habits | `username`, `timeframe?` |

## Development

### Prerequisites

- Node.js 18+
- Cloudflare Workers account
- Last.fm API key ([create one here](https://www.last.fm/api/account/create))

### Local setup

```bash
git clone https://github.com/rianvdm/lastfm-mcp.git
cd lastfm-mcp
npm install
```

Create `.dev.vars`:

```
LASTFM_API_KEY=your_api_key
LASTFM_SHARED_SECRET=your_shared_secret
JWT_SECRET=your_jwt_secret
```

```bash
npm run dev
```

Test with the inspector:

```bash
npx @modelcontextprotocol/inspector http://localhost:8787/mcp
```

### Deployment

Set production secrets:

```bash
echo "your_api_key" | wrangler secret put LASTFM_API_KEY --env production
echo "your_shared_secret" | wrangler secret put LASTFM_SHARED_SECRET --env production
echo "your_jwt_secret" | wrangler secret put JWT_SECRET --env production
```

Deploy:

```bash
npm run deploy:prod
```

### Testing

```bash
npm test
npm run typecheck
npm run lint
```

## Architecture

- Runtime: Cloudflare Workers
- Protocol: MCP (streamable HTTP)
- Auth: OAuth 2.0 (RFC 9728)
- Storage: Cloudflare KV for sessions, tokens, and caching
- API: Last.fm Web API v2.0

### Endpoints

| Endpoint | Purpose |
| -------- | ------- |
| `/mcp` | MCP JSON-RPC endpoint |
| `/authorize` | OAuth 2.0 authorization |
| `/.well-known/oauth-authorization-server` | OAuth server metadata |
| `/.well-known/oauth-protected-resource` | OAuth resource metadata |

## Contributing

1. Fork the repo
2. Create a feature branch
3. Commit your changes
4. Open a pull request

## License

MIT

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