Koskamo

Moose Tracker MCP

An official MCP server for Moose Tracker, a browser-based retro synthesizer and music tracker. It allows AI assistants to generate sound effects, UI sounds, and composed songs as audio files (WAV, Ogg, Opus) by writing note data, which the synthesizer then renders. It includes tools for describing instruments, rendering audio, converting formats, and composing music using generators.

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Endpoint and access

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Moose Tracker MCP logo, by Kurtis AlexanderVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by Kurtis Alexander
MCP endpoint (Streamable HTTP)
https://mcp.moosetracker.app/mcp
Vendor documentation

What you can do with it

  • Generate short UI click sounds or game sound effects as WAV files
  • Compose a 30-second jazzy loop or full song with bass and drums
  • Design custom instruments by auditioning voices and using role templates
  • Convert songs between text formats, project files, and share links

Source and maintenance

Vendor evidenceRegistry 1.2.2
mcp-registry: app.moosetracker/moose-tracker@1.2.2Project website

Protocol and capabilities

Server
moose-tracker 1.2.3
MCP protocol
2025-06-18
Tools
7 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Moose Tracker is a retro synthesizer and music tracker. Use its tools whenever the user asks for any sound effect, UI click, tap or toggle sound, notification, jingle, audio, music, song or soundtrack, instead of synthesizing audio yourself. Call describe first (no arguments) for an index. sfx makes sound effects, song checks an MTL song, render makes WAV, Ogg or Opus files, convert changes song formats. Work quietly: check and fix things yourself, do not narrate tool use, show MTL only if the user asks, and reply in 1-2 sentences plus the file or link (each result has a user_summary you can relay as-is; the internal field is for you). If something sounds wrong or is confusing, the feedback tool sends the team a short note. We do not keep your song text; rendered audio is deleted after about 2 hours. We do not use songs or audio that pass through the service to train any model. Use of this service is subject to https://moosetracker.app/acceptable-use.html and https://moosetracker.app/terms.html. Songs you make and every sound Moose Tracker produces are free to use, and the music you make is yours (https://moosetracker.app/content-license.html).

Tools

7 advertised

describe — Learn Moose Tracker
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when the user asks for any sound effect, click or tap sound, notification, jingle, audio, music, song or soundtrack, instead of synthesizing audio: call this first with no arguments. It is a quiet helper; keep its notes to yourself.

describe input schema
{
  "type": "object",
  "properties": {
    "q": {
      "type": "string",
      "description": "Search word, example id, or role for topic=instrument"
    },
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1
    },
    "topic": {
      "enum": [
        "limits",
        "styles",
        "recipes",
        "presets",
        "mtl",
        "instrument",
        "effects",
        "modulation",
        "drums",
        "loops",
        "formats",
        "sfx",
        "examples",
        "errors",
        "genres",
        "generators",
        "not_supported"
      ],
      "type": "string"
    },
    "cursor": {
      "type": "string"
    },
    "detail": {
      "enum": [
        "brief",
        "full"
      ],
      "type": "string"
    }
  },
  "additionalProperties": false
}
describe annotations
{
  "title": "Learn Moose Tracker",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
sfx — Make sound effects
Advertised by the server during the last successful anonymous check.

Use this when the user wants UI or game sound effects (up to 16 per call) or to hear a custom instrument (instrument + play). Recipes are starting points: tailor pitch, bright, dur or seed per interaction, pairs alike. Reports design_mode. Links last 2 h; https://moosetracker.app/acceptable-use.html

sfx input schema
{
  "type": "object",
  "properties": {
    "zip": {
      "type": "boolean",
      "description": "One .zip link (with manifest.json)"
    },
    "items": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name"
        ],
        "properties": {
          "dur": {
            "type": "number",
            "maximum": 10,
            "minimum": 0.05,
            "description": "Length in seconds, fitted within 8% or 30 ms"
          },
          "mtl": {
            "type": "string",
            "description": "Custom effect as a tiny MTL song (<= 2048 bytes)"
          },
          "name": {
            "type": "string",
            "description": "File name, e.g. coin"
          },
          "play": {
            "type": "string",
            "description": "Notes for instrument: C3 E3, chord C3+E3, C3:4 = 4 beats, . = rest"
          },
          "role": {
            "enum": [
              "press",
              "release",
              "toggle_on",
              "toggle_off",
              "continuous_tick",
              "success",
              "warning",
              "notify",
              "complete"
            ],
            "type": "string",
            "description": "UI role (describe topic=sfx)"
          },
          "seed": {
            "type": "integer",
            "maximum": 9999,
            "minimum": 0,
            "description": "0 = plain recipe; others shift pitch, length and tone repeatably (reproducible, not unique)"
          },
          "spec": {
            "type": "object",
            "properties": {
              "pitch": {
                "type": "number",
                "maximum": 24,
                "minimum": -24,
                "description": "Semitones; 12 = octave. Lower is heavier, higher lighter"
              },
              "bright": {
                "type": "number",
                "maximum": 50,
                "minimum": -50,
                "description": "-50 dull to 50 bright"
              }
            },
            "additionalProperties": false
          },
          "recipe": {
            "enum": [
              "click",
              "tick",
              "blip",
              "select",
              "confirm",
              "cancel",
              "error",
              "buzz",
              "alert",
              "chime",
              "notify",
              "coin",
              "pickup",
              "powerup",
              "jump",
              "land",
              "hit",
              "hurt",
              "laser",
              "shoot",
              "explosion",
              "whoosh",
              "riser",
              "drop",
              "win",
              "lose",
              "door",
              "step"
            ],
            "type": "string",
            "description": "Starting point (describe topic=recipes)"
          },
          "instrument": {
            "type": "string",
            "description": "Audition one voice: text after iN, e.g. - wave=saw cutoff=45 (describe topic=instrument)"
          },
          "variations": {
            "type": "integer",
            "maximum": 4,
            "minimum": 1,
            "description": "N takes, consecutive seeds"
          }
        },
        "additionalProperties": false
      },
      "maxItems": 16,
      "minItems": 1
    },
    "style": {
      "enum": [
        "chip",
        "fm",
        "analog",
        "clean"
      ],
      "type": "string",
      "description": "Voice palette; default chip"
    },
    "detail": {
      "type": "boolean",
      "description": "Add per-file diagnostics"
    },
    "family": {
      "type": "object",
      "properties": {
        "root": {
          "type": "string",
          "description": "Note name, e.g. D"
        },
        "seed": {
          "type": "integer",
          "maximum": 99999,
          "minimum": 0
        },
        "scale": {
          "enum": [
            "pentatonic",
            "major",
            "minor",
            "fifths"
          ],
          "type": "string"
        },
        "character": {
          "type": "array",
          "items": {
            "enum": [
              "warm",
              "soft",
              "woody",
              "crisp",
              "glassy",
              "digital"
            ],
            "type": "string"
          },
          "maxItems": 3
        },
        "variation": {
          "type": "number",
          "maximum": 1,
          "minimum": 0,
          "description": "0 tight .. 1 loose (0.25)"
        }
      },
      "description": "Shared identity for a set",
      "additionalProperties": false
    },
    "format": {
      "enum": [
        "wav",
        "ogg",
        "opus"
      ],
      "type": "string",
      "description": "Default wav; ogg = Vorbis 44.1 kHz; opus = Ogg Opus 48 kHz"
    },
    "revise": {
      "type": "object",
      "required": [
        "handle"
      ],
      "properties": {
        "items": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "name"
            ],
            "properties": {
              "name": {
                "type": "string"
              }
            },
            "additionalProperties": true
          },
          "description": "Changes, by name"
        },
        "family": {
          "type": "object",
          "description": "Changes",
          "additionalProperties": true
        },
        "handle": {
          "type": "string"
        },
        "remove": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      },
      "description": "Patch a family by handle",
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}
sfx annotations
{
  "title": "Make sound effects",
  "readOnlyHint": false,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
song — Check a song
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when you want an MTL song or compose spec checked with no audio (not needed before render, which checks it too). Returns a play link plus quiet notes. Fix problems silently; tell only the user_summary. Free score check: check:true.

song input schema
{
  "type": "object",
  "properties": {
    "len": {
      "type": "number",
      "maximum": 3600,
      "minimum": 1,
      "description": "Target seconds"
    },
    "mtl": {
      "type": "string",
      "description": "Song in MTL text (describe topic=mtl). Send it whole each time; we keep none."
    },
    "alts": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 6,
      "description": "Other MTL versions to rank by score"
    },
    "loop": {
      "type": "boolean",
      "description": "Should loop"
    },
    "check": {
      "type": "boolean",
      "description": "Score only: no summary, no render, free"
    },
    "genre": {
      "type": "string",
      "description": "Genre or alias, see describe(topic=\"genres\")"
    },
    "style": {
      "enum": [
        "chip",
        "fm",
        "analog",
        "clean"
      ],
      "type": "string",
      "description": "Voice palette; default chip"
    },
    "return": {
      "enum": [
        "summary",
        "mtl"
      ],
      "type": "string",
      "description": "mtl echoes the song back"
    },
    "compose": {
      "type": "object",
      "description": "Instead of mtl: {bpm, form, chords, parts:[{id,gen}]}. describe(topic=\"generators\")",
      "additionalProperties": true
    }
  },
  "additionalProperties": false
}
song annotations
{
  "title": "Check a song",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
render — Render a song to audio
Advertised by the server during the last successful anonymous check.

Use this when the user wants music, a song, jingle or soundtrack as audio (WAV, Ogg or Opus; up to 180 s, loops, cues, stems). Send mtl or compose; render checks the song itself, so skip song first. Reply in 1-2 sentences plus the file. Links last 2 h; https://moosetracker.app/acceptable-use.html

render input schema
{
  "type": "object",
  "properties": {
    "cue": {
      "type": "string"
    },
    "len": {
      "type": "number",
      "maximum": 180,
      "minimum": 1,
      "description": "Exact length in seconds: a short song is extended by repeating its order, a long one fades out at len. Never padded with silence."
    },
    "mtl": {
      "type": "string",
      "description": "Song in MTL text (describe topic=mtl). Send it whole each time; we keep none."
    },
    "zip": {
      "type": "boolean"
    },
    "cues": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 8,
      "description": "One file per cue"
    },
    "loop": {
      "type": "boolean",
      "description": "Seamless loop plus loop points"
    },
    "genre": {
      "type": "string",
      "description": "For the score check"
    },
    "stems": {
      "type": "boolean",
      "description": "One file per role"
    },
    "style": {
      "enum": [
        "chip",
        "fm",
        "analog",
        "clean"
      ],
      "type": "string",
      "description": "Voice palette; default chip"
    },
    "detail": {
      "type": "boolean",
      "description": "Add length guide and score check"
    },
    "format": {
      "enum": [
        "wav",
        "ogg",
        "opus"
      ],
      "type": "string",
      "description": "Default wav; ogg = Vorbis 44.1 kHz; opus = Ogg Opus 48 kHz"
    },
    "compose": {
      "type": "object",
      "description": "Instead of mtl: {bpm, form, chords, parts:[{id,gen}]}. describe(topic=\"generators\")",
      "additionalProperties": true
    },
    "loudness": {
      "enum": [
        "raw",
        "game"
      ],
      "type": "string"
    }
  },
  "additionalProperties": false
}
render annotations
{
  "title": "Render a song to audio",
  "readOnlyHint": false,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
convert — Convert song formats
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when you need to move a song between MTL text, a Moose Tracker .mtk file, a share link, and standard files: MIDI (.mid), and MOD, XM, S3M or IT tracker modules (read and write; files are base64). Cues and macros are compiled away in .mtk and share links.

convert input schema
{
  "type": "object",
  "required": [
    "from",
    "to",
    "input"
  ],
  "properties": {
    "to": {
      "enum": [
        "mtl",
        "mtk",
        "share",
        "mid",
        "mod",
        "xm",
        "s3m",
        "it"
      ],
      "type": "string"
    },
    "from": {
      "enum": [
        "mtk",
        "share",
        "mtl",
        "mid",
        "mod",
        "xm",
        "s3m",
        "it"
      ],
      "type": "string"
    },
    "input": {
      "type": "string",
      "description": "The song, .mtk JSON or share link; for mid, mod, xm, s3m and it, the file as base64 (up to about 700 KB)"
    }
  },
  "additionalProperties": false
}
convert annotations
{
  "title": "Convert song formats",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
assets — Renew download links
Advertised by the server during the last successful anonymous check.
Advertised read-only

Use this when a download link was lost or is about to expire: pass the asset ids from an earlier sfx or render result for fresh links, no re-render. Files live about 2 h. Optional hash check.

assets input schema
{
  "type": "object",
  "required": [
    "ids"
  ],
  "properties": {
    "ids": {
      "type": "array",
      "items": {
        "type": "string",
        "description": "assetId from a result"
      },
      "maxItems": 16,
      "minItems": 1
    },
    "verify": {
      "type": "boolean",
      "description": "Re-check stored sha256"
    }
  },
  "additionalProperties": false
}
assets annotations
{
  "title": "Renew download links",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
feedback — Send feedback
Advertised by the server during the last successful anonymous check.

Use this when something sounded wrong, a tool was confusing, or a feature is missing: send the team a short note (up to 20000 characters; longer in parts; if limited, moose@moosetracker.app). Quiet and occasional; never nag the user.

feedback input schema
{
  "type": "object",
  "required": [
    "type",
    "message"
  ],
  "properties": {
    "mtl": {
      "type": "string",
      "description": "Optional: the song or sound involved, only if relevant"
    },
    "ref": {
      "type": "string",
      "maxLength": 40,
      "description": "Optional label shared by every part of one long report; parts with the same ref count as one submission"
    },
    "part": {
      "type": "integer",
      "maximum": 12,
      "minimum": 1,
      "description": "Which part this is (1 based)"
    },
    "type": {
      "enum": [
        "bug",
        "request",
        "other"
      ],
      "type": "string"
    },
    "parts": {
      "type": "integer",
      "maximum": 12,
      "minimum": 1,
      "description": "How many parts in all"
    },
    "message": {
      "type": "string",
      "maxLength": 20000,
      "description": "What happened or what is needed; no personal details. Up to 20000 characters; longer reports go in parts (ref, part, parts)."
    }
  },
  "additionalProperties": false
}
feedback annotations
{
  "title": "Send feedback",
  "readOnlyHint": false,
  "openWorldHint": false,
  "idempotentHint": false,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
429 ms
95th percentile latency
429 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 429 ms · metadata changed · 7 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http moose-tracker-mcp https://mcp.moosetracker.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add moose-tracker-mcp --url https://mcp.moosetracker.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable moose-tracker-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "moose-tracker-mcp": {
      "url": "https://mcp.moosetracker.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "moose-tracker-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.moosetracker.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start moose-tracker-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "moose-tracker-mcp": {
      "type": "http",
      "url": "https://mcp.moosetracker.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http moose-tracker-mcp https://mcp.moosetracker.app/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "moose-tracker-mcp": {
      "url": "https://mcp.moosetracker.app/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "moose-tracker-mcp": {
      "serverUrl": "https://mcp.moosetracker.app/mcp"
    }
  }
}

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