I'm considering doing a point of sale app and have started integrating with both the older Web Service gateway:
And what looks to be the new (and is it preferred?) gateway:
To the folks at First Data/Payeezy: are there any differences I should be aware of? Do you prefer people using this newer API? Are merchant accounts subject to the same fees/etc? The documentation was really confusing with regards to which I should use. Also, can I use a card reader and send over raw track data with this new API?
I've integrated with both using C#/.NET and I have a project on GitHub that folks are welcome to take any code from:
Anyone reading this is always welcome to fork/pull request my little project too. I've only spent a few hours working on it in my free time, so there's a lot of room for improvements.