We are moving from the old SOAP API to the new REST API to publish into Content Builder. As a result we need to create installed packages inside our clients SFMC accounts so we can get tokens to use in API Calls.
We have dedicated username/password with API access for each SFMC business unit. What I can't figure out is how to create installed packages via the API so I can begin making the other API calls (such as publishing content blocks or emails into the account).
It's not feasible to install these packages manually in each client's account as this does not scale. Can I do this somehow utilizing an API enabled username/password?
The obvious route is going through the AppExchange but I didn't know if there was a pure API driven route.