{"name":"audio-loudnorm","description":"Audio loudness normalizer (EBU R128 LUFS). Podcast / Spotify / YouTube target presets (-23 / -16 / -14). Two-pass dynamic mode. Returns hosted MP3.","price":"$0.02","method":"POST","input_schema":{"properties":{"audio_url":{"type":"string"},"target_lufs":{"type":"number","description":"Default -16. Range -30 to -10."},"true_peak":{"type":"number","description":"Default -1.5. Range -9 to 0."}},"required":["audio_url"]},"input_example":{"audio_url":"https://download.samplelib.com/mp3/sample-3s.mp3","target_lufs":-16},"output_example":{"audio_url":"https://...mp3","duration_seconds":120,"target_lufs":-16},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}