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download_audio

download_audio

MCPTube download_audio tool: download YouTube audio as MP3 with cover art and tags, or as M4A with the original AAC stream, right in Otherside, Claude, ChatGPT or Cursor.

Download YouTube audio · REST: POST /v1/audio

MP3 with cover art and tags, or M4A with the original AAC stream, no re-encoding. Returns a temporary download link.

Parameter	Type	Description
`url`required	string	URL or ID of a YouTube video.
`format`default: mp3	"mp3" \| "m4a"	MP3 with cover art and tags, or M4A with the original AAC.
`audioLanguage`optional	string	Preferred track for dubbed videos, such as `"pt"`, `"en"` or `"original"`.

Example

Ask your assistant

Download the audio of this video as MP3: youtu.be/jNQXAC9IVRw

Your assistant calls download_audio and answers with the file link.

curl

curl https://mcp.mcptube.com/v1/audio \
  -H "Authorization: Bearer mct_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "youtu.be/jNQXAC9IVRw", "format": "mp3"}'

Response

Response

{
  "videoId": "jNQXAC9IVRw",
  "title": "Me at the zoo",
  "author": "jawed",
  "durationSeconds": 19,
  "fileName": "jNQXAC9IVRw-Me at the zoo.mp3",
  "fileSizeBytes": 412160,
  "downloadUrl": "https://mcp.mcptube.com/files/7HqZ2mWv…/jNQXAC9IVRw-Me%20at%20the%20zoo.mp3",
  "expiresAt": "2026-10-21T19:31:00.000Z",
  "audioFormat": { "container": "mp4", "audioCodec": "mp4a.40.2", "videoCodec": null, "height": null, "fps": null, "audioTrack": null }
}

On MCP, your assistant gets these same fields. The link is valid for 60 minutes. See files and links.