Preparation

To participate in the Partner Center and to use the Marketplace API, the Partner needs to sign up for a Matrix42 Company Account. The registration can be conducted at https://accounts.matrix42.com/my/register . 
Please note that if a company is already registered as a Partner, it is unnecessary to check the box at Create Company Account. However, if a company is not yet registered at the time of sign-up, the box needs to be checked and additional fields filled in.

Once done, the Matrix42 Marketplace Team will validate the provided registration information to verify the account and authorize for the usage of the Marketplace API. Through the registration a unique Customer Number is assigned to the Partner.
After the registration, a Partner can create personal access tokens (PAT) at https://accounts.matrix42.com/my/account . These are used in the authentication mechanism for the API (see below).

For the technical setup for the API functionalities a Partner needs to provide a set of master data to Matrix42 that contains a full billing address and a valid billing email-address. The data is necessary to create valid Orders in the system.

The full documentation can be downloaded here: Matrix42_Marketplace_Partner Center_API_2020_03_31.pdf