Zeltor Music Tools MCP Server

by zeltorlabs Your server? Claim it

not responding

Zeltor Music Tools is listed as active in the registry but did not answer our last check. It exposes 6 tools.

Check if two songs mix (Camelot key, BPM), read shared song DNA reports, tempo and nightcore math.

Uptime history 8 days of history · worst day 0%

8 days agonow

2.2%

Uptime 24h

2 of 92 checks

Tools

read from the server

341 ms

Response time

average over 24h

open, no key

Access

streamable-http

Zeltor Music Tools does not always answer

Over the last week it answered 7.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add music-tools --transport http https://zeltorlabs.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://zeltorlabs.com/mcp

~/.codex/config.toml

[mcp_servers.music-tools]
url = "https://zeltorlabs.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "music-tools": {
      "url": "https://zeltorlabs.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "music-tools": {
      "type": "http",
      "url": "https://zeltorlabs.com/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

camelot

camelot

Gives the Camelot wheel code for a key and the three other keys that mix cleanly with it (one step either way with the same letter, and the relative major or minor).

mix

check_mix

Decides whether two songs will mix well, from their keys and BPMs, using the Camelot wheel and DJ tempo limits (about 3% sounds natural, up to about 16% is usable, half and double time count). Returns a verdict, the tempo change in percent and the target BPM for track B, the smallest key shift in semitones if the keys clash, and a link to make the matched audio.

song

song_report

Reads the song DNA from a MusicMind report the person made on zeltorlabs.com and shared: key and Camelot code with the keys that mix with it, BPM, genre mix, section structure with energy, and production DNA (energy profile, mood, arrangement density, compression, biggest moments). Takes the share link (https://zeltorlabs.com/report/r/<code>) or its code. Use the key and BPM with check_mix to compare it with another song. If the person has no report yet, they can make one free at https://zeltorlabs.com/analyze (the audio is analyzed in their browser).

speed

speed_pitch

For a nightcore (faster and higher) or slowed (slower and lower) version: the pitch change in semitones for a speed, the new BPM if given, and typical settings. Defaults: nightcore 1.25x, slowed 0.80x.

tempo

tempo_change

Percent change and playback rate to go from one BPM to another, how noticeable it will sound, the pitch change if it is not time-stretched, and the half and double time of the target.

transpose

transpose

Moves a key up or down by semitones and gives the new key name and Camelot code, with a note on how natural the shift will sound.

Endpoints

URL	Transport	State	Latency	Checked
https://zeltorlabs.com/mcp	streamable-http	answering	79 ms	7 min ago

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Zeltor Music Tools — questions

Answers built from our own checks of this server.

What can Zeltor Music Tools do?

It exposes 6 tools, read directly from the server on our last check. Among them: camelot, check_mix, song_report, speed_pitch, tempo_change, transpose. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Zeltor Music Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 2 of 92 checks got a reply (2.2%), average response time 341 ms. The bar chart above shows every period we have measured.

The registry lists Zeltor Music Tools as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Zeltor Music Tools?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Zeltor Music Tools need an API key?

No. Zeltor Music Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Zeltor Music Tools?

It answers our handshake in 341 ms on average, which is faster than 40% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.