Having said that... I think OpenAPI is exactly the right direction - it comes free with most ways of building an API or easily can, and once you have it interfa

Having said that... I think OpenAPI is exactly the right direction - it comes free with most ways of building an API or easily can, and once you have it interfaces are just a transform away. And reflecting on your approach, perhaps it's quite a good way to on-board lots of organisations that might have been hesitant or left behind otherwise.