# ID Photo Background Swap — 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://idphoto-bg-swap.yeezhan.com
Skill definition: https://idphoto-bg-swap.yeezhan.com/skill/SKILL.md
API documentation: https://idphoto-bg-swap.yeezhan.com/api/docs

## What this tool does
White, red or blue ID-photo background — AI cutout plus exact color swap.

## Typical user problems
- Strict validators check head position within a few percent. The Pro version detects facial landmarks and places your head to the exact spec — the compliance-grade option.
- 不同用途要求不同底色：白底/蓝底/红底各一份。AI 抠图后精确换色，边缘无杂色。

## Parameters
- bg_color: enum, required. 背景色

## 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
- Max input 20 MB
- Front-facing photos only
- Powered by HivisionIDPhotos (Apache-2.0)