registry/nbg.gr N nbg.gr 1 integration · REST Authentication live Find how to authenticate with nbg.gr — where to get the credential and how to pass it.Find auth setup → REST · OpenAPI 1 Account and Transaction API Specification - UK ## Functionality at a glance The NBG "UK OPB - Account and Transaction v3.1.5" API follows the [UK Open Banking Specification vv3.1.5
