Pricing

PROOF uses a prepaid credit system. Credits are measured in milli-USD (1,000 milli-USD = $1.00 USD). Credits are deducted based on the input type, volume, and model selected.

Credit costs

Input type	Basic model	Premium model
PDF page	$0.001 (1 md)	$0.005 (5 md)
Office/HWP page	$0.001 (1 md)	$0.005 (5 md)
Image	$0.001 (1 md)	$0.005 (5 md)
Audio (per second)	—	$0.001 (1 md)
Video (per second)	—	$0.005 (5 md)
Markdown (.md)	Free (0 md)	Free (0 md)
Docling refinement (per page)	—	$0.003 (3 md)

info

Basic model: 100 free pages per day. After the free quota, $0.001/page is charged. Premium model: No free quota. All pages are charged at $0.005/page.

XLSX conversion

Format	Cost
XLSX Basic	$0.001 per unit (page or file), first conversion only
XLSX Advanced	$0.003 per unit (page or file), first conversion only
DOCX	Free
PPTX	Free

Subsequent downloads of the same format are free.

Checking current rates

curl -H "X-API-Key: chu_live_xxxxxxxx" \
  https://your-domain.com/api/v1/account/pricing

Response:

{
  "currency": "USD",
  "charge_limits": {
    "min_amount": 5,
    "max_amount": 500
  },
  "rates": {
    "basic_page_milli_usd": 1,
    "premium_page_milli_usd": 5,
    "premium_audio_sec_milli_usd": 1,
    "premium_video_sec_milli_usd": 5,
    "docling_refinement_page_milli_usd": 3
  }
}

Purchasing credits

Visit the Payment page in the PROOF web app to purchase credits via Paddle. You can choose any amount between $5 and $500 USD. Auto-recharge is also available after your first payment.

Usage tracking

• Today's usage — see today_usage in the account response
• Daily usage history — aggregated by day
• Transaction history — credit charge/spend log
• Payment history — payment records