Inkspan › Watermark PDF API

Watermark PDF API

Stamp DRAFT, CONFIDENTIAL, or any text across every page of a PDF in one call — for document control and review workflows.

Example

import requests
r = requests.post('https://api.inkspan.dev/v1/pdf/watermark',
    headers={'X-API-Key': 'ink_live_...'},
    files={'file': open('input.pdf','rb')})
print(r.json())

Why an API instead of building it

• No headless-browser infrastructure, fonts, or scaling to maintain.
• Usage-based pricing; free tier covers 100 documents/month.
• Extraction returns confidence scores so you never ship false-certain data.