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Bandmixr MCP server

Which servers in the official MCP registry are Bandmixr's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-20

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Whose server it is
  • Registry namecom.bandmixr/bandmixrverified in the MCP registry

The registry name sits under bandmixr.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-20
  • Stateanswerschecked 2026-10-20
  • Tools15
  • Server calls itselfbandmixr
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 174 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • create_song, update_song, set_stem_labels change data without a sign-in: anyone with the address can call them.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 3, the first on 2026-10-20
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer544 ms
  • Space in an agent's context≈ 3,710 tokensthe definitions of all its tools (15), which an agent carries on every turn
  • Tool definitionsA · 97 of 100
  • Typed results0 of 15 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 3 of 15

What an agent can do with it

  • not sure · mix multitrack stems into a balanced song
  • not sure · master a finished mix for streaming release
  • cannot · split a rehearsal recording into individual songs

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that change data, on a server that answers without a sign-in: create_song, update_song, set_stem_labels

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers15 tools · read 2026-10-20
  • master_song

    Opens the Bandmixr studio in the chat to master or enhance a finished song (a stereo mix). The song is checked in the browser for loudness, peaks, stereo image and tonal balance, and a 30-second mastered preview plays next to the…

  • check_mix

    Opens the Bandmixr Mix Analyzer in the chat. It checks a mix or master in the browser (the file is not uploaded): loudness (LUFS), true peak, clipping, stereo image and tonal balance, with a verdict for each and a 30-second mastered…

  • get_analyzer_session

    Returns a 30-minute ticket and the address of the Bandmixr preview service, which the studio in the chat uses for the 30-second mastered preview. The studio calls this tool on its own; the assistant does not need to call it directly.

  • get_account

    Shows the connected Bandmixr account's plan and its limits (stems per song, song length, storage). Needs the person to connect their Bandmixr account.

  • list_songs

    Lists the person's Bandmixr songs, most recently changed first.

  • get_song_status

    One song's stems with their labels, uploads and analysis still running, whether the person has confirmed the labels, and where the mix and master stand.

  • create_song

    Creates a new song in Bandmixr for mixing stems and opens the studio with its upload box. The genre and the mastering style are the ones the person names (other and streaming when they name none). Mixing and mastering are part of it: they…

  • update_song

    Changes the title or the genre of a song (not while it is being mixed).

  • open_song_studio

    Opens the Bandmixr studio for a song in the chat. It shows what the song needs next: the upload box for stems, the label check (only the person can confirm labels there), the mix progress, or the player with the original, the mix and the…

  • get_song_session

    Returns a 15-minute ticket for one of the person's songs, which the studio in the chat uses to upload stems, show the label check and the progress, and play the original, the mix and the master. The studio calls this tool on its own; the…

  • prepare_full_master

    Creates a new song named after the file the person checked in the studio and returns a short-lived ticket for uploading it, so the studio can upload and master the full song. The studio calls this tool when the person chooses to master…

  • set_stem_labels

    Sets what is on each stem from what the person says about their files (stem ids and file names come from get_song_status). It does not confirm the labels: the person still confirms them with "Labels are correct" in the studio before…

  • mix_and_master

    Mixes an existing song's stems and masters the mix in one go (draft, final mix, master), for example to mix it again with another genre or mastering style; a song made with create_song is already set up for this. It waits for the uploads…

  • start_mastering

    Masters the song's finished mix, or masters it again in another style (for example "louder": loud). The song needs a finished mix, from mix_and_master or an uploaded mix. The studio shows the progress and plays the new master, which…

  • adjust_mix

    Changes a song mixed from stems the way the person asks after listening: a stem louder or quieter, muted or back in, more or less reverb, or placed left, center or right. One call takes all the changes for a song. Bandmixr then makes the…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "bandmixr": {
      "type": "http",
      "url": "https://bandmixr.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http bandmixr https://bandmixr.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://bandmixr.com/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.