Are the credentials the same for the Mailbox API and the Online Filing 2.0 API?

Yes.

When you request API credentials the first time, we will create a B2B (business-to-business) account for your MyEPO Portfolio company and send your company administrator credentials consisting of a client ID and secret for this account.

These credentials and the B2B account can be used for all MyEPO APIs, including the Mailbox API and the Online Filing 2.0 API.

Your company administrator will see the B2B account in list of company members in the administration area of MyEPO Portfolio and should assign Mailbox access rights.

In Online Filing 2.0, your company administrator should first add the B2B user to your company and make sure that it has been assigned “draft rights” at minimum.