Please implement PSD2 standard for bank account synchronisation. See https://en.wikipedia.org/wiki/Payment_Services_Directive
Target date: September 2019: all companies within the EU must comply with the national laws and regulations pertaining to directive (EU) 2015/2366 (PSD2)
See this too: http://www.sepaforcorporates.com/single-euro-payments-area/5-things-need-know-psd2-payment-services-directive/
1. The PSD provides the legal framework within which all payment service providers must operate – not all companies.
2. As https://en.wikipedia.org/wiki/Payment_Services_Directive#Market_implementation explains:
PSD2 does not specify the actual machine-to-machine API standards and specification details to be used. The banks and other financial institutions had to agree upon such details to ensure interoperability…
So there is nothing we can do with this level of directives.
If you find technical specifications i.e. at https://www.berlin-group.org, you can ask on the mailing list of aqbanking.de, if they would implement it. They build the library which we use for online banking.
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Rune Osnes commented
What about the more spesific API of Net's Open Banking solution? Many of the Nordic banks are already using it. There is even a sandbox available on their website: