---
tool_name: audio-boost
summary: Raise or lower recording volume by −30 to +30 dB and export as MP3 — fix phone recordings that are too quiet.
input:
  file: binary, required # audio or video file (MP3/WAV/M4A/FLAC/OGG/MP4…) (max 200MB)
  gain_db: number, required, min -30, max 30 # 增益（dB）
output:
  preview_url: string | watermarked preview, free, no auth
  task_id: string | unique task identifier
  payment_url: string | end-user must complete one-time payment to unlock final output
  final_download_url: string | only available after successful payment
auth: login via email/phone OTP on https://audio-boost.yeezhan.com; API callers use a personal API key (Bearer yeek_...)
payment_rule: one-time charge $0.99 per task. NO credits, NO account balance. One payment unlocks only this task.
valid_window: 24 hours after payment
errors:
  - file_too_large
  - invalid_input
  - unsupported_type
  - target_unreachable
  - processing_failed
endpoint: https://audio-boost.yeezhan.com/api/v1/run
---