DIrecta team have a test and demo environments, you just email them and ask what do you want.
They have api team very professional and available to satisfy the customer or new application connected to them.
They have already connected hundreds of third parts applications (Multicharts, Excel, MS.VS, etc...)
You could contact them here:
phone: +39 011 53.01.01
Here all wiky explanation about their API:
Will you add Directa please?