Getting started: https://developer.banked.com/docs/getting-started
By default you are only permitted to create payment sessions with payee details that match an account linked to the console. In test you will have a fake bank account created automatically when signing up to the console. Unless you connect additional sandbox accounts, you must use the following payee details:

account_number 12345678
sort_code 010203

Editor: https://bubble.io/page?type=page&name=banked_api&id=nv-demos&test_plugin=1646908850026x596779563506729000_current&tab=tabs-1

Demo: https://nv-demos.bubbleapps.io/version-test/banked_api

Backend api: https://bubble.io/page?type=api&id=nv-demos&test_plugin=1646908850026x596779563506729000_current&tab=tabs-2