I know for sure Montepio has them. Probably others too but that's the only one I use. I pay all my bus tickets with it directly from the bus company website.

Vasco, can you please point me to that website? I'm researching online payment solutions in Portugal and would love to see that implementation. Thanks.

In Poland probably everything. There's services that handle the integration, so you don't have to implement all of their APIs.

My banks service is called mTransfer, and the integration providers are e.g. Przelewy24 and platnosci.pl. Basically all the polish websites connect to one of those.

In Sweden—all major banks.

Do they use the same API? Or do I have to code each bank? Can you pay to other EU countries? Is there a good documentation source?

APIs are, as far as I know, not publicly available. Each bank has their own API—again as far as I am aware.

I have never seen any integration of this sort with a Swedish bank on an international site, but I don't know if that is because international vendors don't want to bother with integrating with a number of different bank APIs in X number of countries, or if you need to have a local (Swedish) account to be able to process payments this way.

It does look like these are pretty non standard. Moneybookers seem to integrate with a lot of them judging from this http://moneybookers.com/merchant/en/moneybookers_gateway_man... - Poland seems to win for having the most different standards!

The only place I can find that seems to integrate these is Inpay, who I had not heard of before http://www.inpay.com/ who seem to have pretty good coverage.

Denmark same thing