It's a lie.
**Authentication
This software is perpetually free :)
You can get your free API key (with unlimited requests) by creating a free account on https://app.nanonets.com/#/keys.**
This is a response from Shawn Judd, Customer Success Representative shortly.
The library is not open source. These are APIs that will make a call to our OCR models.
Which is not free beyond 500 pages