What version of MODX? If it's Revolution, you might look at the Register snippet or the Subscribe extra, which provides a wrapper for it.
Bob,
Revolution 2.3.1
I have looked through the Register snippet code. I believe the code above works fine for the username portion. Password is what is holding it up. So there must be something else done to the password before it is encoded for the URL, that I have missed. Possibly it's using the saved encrypted password instead of raw? I am digging through it now to find the part I'm missing.
I am building a connector for an IOS app. I have login and register worked out, a big thanks to some of your code. Just trying to get the activation part worked out.
Thanks,
Troy
Using ModX Revolution