For running Neurodactyl fingerprint recognition SDK, you need a valid software license. If you want to get free evaluation license, please contact us at info@.nosp@m.neur.nosp@m.odact.nosp@m.yl.c.nosp@m.om.
See details here Installation.
The SDK is licensed per:

Number of enrolled templates (size of N in the TemplateDB)
Number of servers/machines
Number of GPUs

SDK price is calculated per a project.