---
tool_name: pdf-stamp
summary: Put your company chop or signature PNG on selected pages — position, size and opacity included.
input:
  file: binary, required # PDF + PNG/JPG stamp (2 files) (max 200MB)
  pages: string, optional # 盖章页
  position: enum, optional # 位置
  scale_pct: number, optional, min 5, max 100 # 图章宽度（页宽百分比）
  opacity: number, optional, min 0.05, max 1 # 不透明度
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://pdf-stamp.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://pdf-stamp.yeezhan.com/api/v1/run
---