Intergrate additional couriers via API

Hello,

We have about 5 couriers that we use in our business but currently have to manualy print labels etc with them from our Shopify store as they are not intergrated. We currently have 2 live own courier accounts on our account.

What we want to do is integrate these external providers via API into Easyship so its our source of truth for shipping prices and shipping labels.

Additionaly, will this count towards the 'Own Courier Accounts' allowed on our account. My assumption is that it wont, as these are not native EasyShip shipping couiers. Rather we are intergrating them via API.

Any dev docs and guidance on how to do this will be helpful.