What BSim is
Spinium Bank Simulator (BSim) simulates banks, customers, accounts, payments and the open-banking interfaces real banks expose, so that systems can be built and tested against realistic bank behaviour without touching any real institution.
This door
The Spinium BSim app on a phone reaches this instance here. It is configured by an invitation: a code from whoever runs the instance, claimed on this site, or a link minted in the console. The app then shows the instance's banks, each under its own look.
Nothing here is real
No real money moves, no real contract is made, and nothing done in this instance is a commitment of any kind to anyone. Every bank, account, payment and authorisation is artificial and exists only inside this simulated environment.