I've found the following documentation on the Stocky API as i'm trying to pull purchase orders out of shopify. However it's not clear where i can find an API Key, is it the same as the Admin API for shopify.
We were able to connect by contacting shopify support. They have to enable the option in stocky preferences. Once that is done, the api key will be shown under stocky preferences -> API Access. It is not the same key used for the shopify api.
Unfortunately the stocky purchase order api seems to be missing some fields like ship date. There is updated documentation here: