{"name":"mp4-to-mp3","description":"MP4 → MP3 audio extractor. Any video format (mov, webm, mkv, avi, m4v, flv) → MP3 via CloudConvert. Selectable bitrate (96/128/192 kbps). 60-min / 500MB max.","price":"$0.10","method":"POST","input_schema":{"properties":{"video_url":{"type":"string","description":"Public URL of the source video. Max 500MB / 60 minutes."},"bitrate":{"type":"number","enum":[96,128,192],"description":"Output MP3 bitrate in kbps. 96 (smaller, voice), 128 (default, balanced), 192 (higher quality)."}},"required":["video_url"]},"input_example":{"video_url":"https://example.com/clip.mp4","bitrate":128},"output_example":{"audio_url":"https://...mp3","bitrate":128,"file_size_bytes":161109,"source_url":"https://example.com/clip.mp4"},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}