Hi @mmauderer and thanks for your query. Whilst your project does indeed sound great, I am afraid that you are correct in that the creation of any kind of API wrapper around the Stream Engine SDK is in breach of the licence agreement.
However, if you would care to reach out to the Tobii Tech Sales department @ https://www.tobii.com/tech/contact/
Our apologies for the disappointing news, we hope you can continue to keep developing via the Tobii Stream Engine.
Do let us know if we can provide any further information.