Here are the presentations:
Blendle’s Hypermedia API by Erik Terpstra (Blendle) (slides soon)
Introduction to GraphQL to enhance your APIs by Dionysis Pantazopoulos & Robert Ignat (Jexia)
Hypermedia and API evolution by Joost Cassee (Go About)
Join API NL meetup group to see where are we going to organise our next event!