> v5.vbb.transport.rest's frames were missing something I needed, if I recall correctly. With a fork of hafas-client, I got something to work okay.
It would be great if you could create an Issue in hafas-client about this, so everyone can benefit from the changes.
> I realised I should use another user agent than 'my-awesome-program' which only VBB can provide, I think
If you're talking about hafas-client: No, you can use anything! It's merely about being transparent towards VBB who/what is using their API, but they don't have to approve it beforehand; They can't in fact, because the "mobile" HAFAS API just uses a static auth token.