I've been doing some payment-integration work lately, and the PSPs I've been working with have been painful to integrate against:
- the back-end interfaces seem be stuck in the 90s in terms of usability and technology (frames! Argh!)
- the APIs are badly documented - finding a list of example responses, or a complete list of errors is hard or not present
- support is not particularly responsive or high-level-of-technical-expertise
Surely there are PSPs that are technically up-to-date with friendlier, well-designed interfaces and APIs?
Which ones have people had good integration experiences with?
(Am asking purely from a technical level; commercials are out of scope (I'd still be curious, but that's not the point of the question).)
Update: I'm based in the UK, but working for a company whose website operates one instance in each of several countries throughout Europe.