I'm trying to construct a callback url that will get called once a payment succeeds. This 'Success URL' is called on the payment providers end, so I can therefore not supply any headers etc. for the request, only a URL.
Parse.com getting data from callback URL in this question it seems that it is possible to construct a url with the app ID and REST API Key in the actual URL, but I can't figure out how.
I've tried the approach the person in the above question has done, but with no luck. Any suggestions on how to achieve this?
Is this a bad approach? Is there any alternatives?
