Sabre Germany offers a similar option to the N.A. model.
Difference is, its not a monthly membership but annually.

Amadeus Germany also offers a solution, for both Ama + Sabre you don't need a host agency and you don't need an IATA accrediation if you don't want to issue tickets.

If you're primary goal is to look up fares, go with Sabre!
With AMA you always need to specify the carrier when looking up fares, up to 3 max / request. With Sabre that is not needed, it lists all carriers in 1 request, so you can say, show me all basefares for all carrier for this given route in this dateframe.