# Platform SOAP API
The cooperation between eConnect and the software supplier aims to strengthen both parties in offering added value for the customer. eConnect focuses on the transport of electronically structured financial messages, including invoices, and related services between companies. Via the eConnect platform, users of financial software packages can actually process their invoices electronically if the software supplier is connected to eConnect or another trusted network. Communication between systems takes place based on the eConnection API. The technical structure of this API and access security aspects are covered in this documentation.
We advise to use the REST API and connecting your software to our PSB, the PSB can connect to our platform. More information about how the connection should be by connecting to our PSB, but also using our platform, can be obtained via firstname.lastname@example.org.
More info about our platform can be found on our invoice-portal (opens new window) page.