---
tool_name: hue-saturation
summary: Rotate hue, boost or mute saturation, lift or drop lightness — quick colour grading without a editor.
input:
  file: binary, required # jpg / jpeg / png / webp (max 50MB)
  hue: number, required, min -360, max 360 # 色相旋转
  saturation: number, required, min 0, max 2 # 饱和度
  lightness: number, optional, min -100, max 100 # 亮度
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://hue-saturation.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://hue-saturation.yeezhan.com/api/v1/run
---