Yes and no.
Yes, you can receive the release and authorize or nominate your chain partners with a Cargo Controller API subscription. Read more about this in our API specifications (in English) and in particular the Use Cases surrounding the Secure Chain.
No, you cannot manage adding and managing customer codes per shipping company and managing authorizations of chain partners via API. You will have to maintain this via the web screens.
Activation of Secure Chain
Within the Cargo Controller API you have direct access to the Chain of Trust and the information made available therein.
If you are an existing customer, you must first request rights for the web screens via your main user or user administrator to release these functionalities in the web screens. You can read more about that here.