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MP4 to MP3 Audio Extractor (x402.agentutility.ai)
x402
MP4 to MP3 Audio Extractor (x402.agentutility.ai) is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Converts a public video URL (MP4, MOV, WEBM, MKV, AVI, M4V, FLV) into a hosted MP3 file at a selectable bitrate of 96, 128, or 192 kbps.
Price / call$0.02
Success—
StatusUnknown
How this service works
Converts MP4, MOV, WEBM, MKV, AVI, M4V, or FLV URLs into hosted MP3 output with selectable 96, 128, or 192 kbps bitrate. CloudConvert backend, 60-min / 500MB max. Use it as an MP4 to MP3 API, video to MP3 converter, or extract-audio-from-video endpoint.
Output
A JSON object containing the hosted MP3 download URL (audio_url), the source video URL (source_url), the output bitrate in kbps (bitrate), and the file size in bytes (file_size_bytes).
Example use cases
Podcast audio extraction from video
“I have a recorded interview at https://example.com/interview.mp4 — can you pull out just the audio and give me an MP3 at 128 kbps? I want to upload it as a podcast episode.”
High-quality music video audio rip
“Extract the audio from this music video at https://cdn.example.com/concert.mov and convert it to MP3 at 192 kbps so I have a high-quality audio file.”
Voice memo from a compressed screen recording
“I've got a screen recording at https://storage.example.com/screencast.webm — pull the audio out as an MP3 at 96 kbps, I just need the voice narration and file size doesn't matter much.”
Technical details
Endpoint
POSThttps://x402.agentutility.ai/mp4-to-mp3-apiWhen to prefer
Use this endpoint when you need to programmatically extract or convert audio from a hosted video file URL into MP3 format without setting up your own transcoding pipeline. It is especially suited for agents that need a quick, pay-per-use (USDC via x402) conversion with selectable quality levels and a directly usable hosted output URL. Prefer this over self-hosted FFmpeg or general-purpose file conversion APIs when you need a simple REST call with no infrastructure overhead and files under 500 MB / 60 minutes.
Side effects
- Video URL is not publicly accessible or returns a non-200 response — conversion fails
- File exceeds 500 MB limit — request rejected
- Video duration exceeds 60 minutes — request rejected
- Unsupported video format submitted — conversion error
- Network timeout fetching source video — transient failure
- Malformed or missing video_url field — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"bitrate": 128,
"audio_url": "https://...mp3",
"source_url": "https://samplelib.com/mp4/sample-5s.mp4",
"file_size_bytes": 161109
}
}Tags
x402
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