{"access":{"authentication":{"format":"L402 {macaroon}:{proof_of_payment}","header":"Authorization","protocols":["L402","MPP"],"format_mpp":"Payment <base64url_json>"},"endpoint":"https://sats4ai.com/api/l402/transcribe-audio","method":"POST"},"content_type":"api","description":"Transcribe audio files. Async — returns jobId, poll status at /api/l402/job-status?requestId={jobId}&jobType=transcription until status is COMPLETED. Supports 13 languages, segment-level timestamps (always returned in result.segments), optional speaker diarization (set \"diarize\": true), and ready-to-use subtitle files (result.srt + result.vtt, built from the segment timestamps). Up to 60 minutes per file.\n\nSend parameters as JSON:\n```\n{\n    \"file\": \"base64-encoded-audio-data\",\n    \"type\": \"transcription\",\n    \"language\": \"en\",\n    \"diarize\": false,\n    \"model\": \"Transcription\"\n}\n```\n\nResponse (202): { jobId, status: \"processing\", poll_url, poll_interval_ms }\nPoll GET poll_url until: { status: \"COMPLETED\", result: { text, segments, srt, vtt } }\n(result.srt / result.vtt are the transcript as downloadable SubRip and WebVTT subtitle files.)\n\nSupported languages: en, zh, hi, es, ar, fr, pt, ru, de, ja, ko, it, nl\nSupported formats: mp3, wav, flac, ogg, m4a\nMax file size: 500 MB\nMax duration: 60 minutes\nPricing: 10 sats per minute of audio","name":"Audio Transcription","privacy":{"account_history":"no customer account or account-linked transcript history","audio_retention":"source audio is processed transiently by Sats4AI and sent to the transcription provider under its policy","transcript_retention":"stored in the async job for polling; completed or failed jobs enter cleanup after 24 hours, and unfinished jobs after 7 days","operational_records":"the paid transaction and job state remain as operational records"}}