How do information and initiation services work from a technical perspective?

For the connection to your accounts Qwist uses technical interfaces (so-called APIs). If, in exceptional cases, no API is made available by your bank, Qwist also uses so-called Screen Scraping or HBCI/ FinTS to establish the connection. For a connection via APIs as well as via Screen Scraping or HBCI/ FinTS, Qwist needs your online banking access data as well as the confirmation via a 2nd factor (eg, TAN) to prove to the bank that Qwist signs up on your behalf and carries out the desired actions at your bank.