Regarding your question, here is my opinion and stuff that I already done:
1) With several, MERCEDES (DAS XENTRY only cars with Euro V and VI, IDS, Diagbox PSA, Odis VW group, Vida Volvo... I know it's possible to work with Honda, but I didn't try.
2) The Maxisys automatically recognize the car and the ECU and does all the job for you. So it do the access to Autel server automatically.
3) I haven't done already the list of the manufactures websites, but if you need one in particularly, please be free to contact me.