# PDF Overlay (Stamp Page onto Page) — yeezhan.com
> One-time pay-per-task emergency tool to make your file ready for submission.
> No credits, no balance. One payment unlocks one task result, valid for 24 hours.

Tool domain: https://pdf-overlay.yeezhan.com
Skill definition: https://pdf-overlay.yeezhan.com/skill/SKILL.md
API documentation: https://pdf-overlay.yeezhan.com/api/docs

## What this tool does
Lay a template, seal or pre-printed form page exactly on top of a base page — perfect registration without printers or Photoshop layers.

## Typical user problems
- The office already prints invoices on pre-printed letterhead — digitally you need the same trick: stamp the letterhead / seal / grid template page precisely over a page of the base document. Two PDFs in, one merged PDF out.

## Parameters
- target_page: number (range 1+页), optional. 叠加到第几页

## Pricing
- Watermarked preview: free, no login required
- Final clean output: $0.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Overlay is drawn opaque on top — it covers, not blends
- Subsetted CJK-font pages may appear blank in some viewers (known pdf-lib limitation)
- Max 200 MB