Sure, I understand. This functionality was available until BioMart Central Portal (BCP) was live, unfortunately BCP is not maintained anymore. Whats left on
www.biomart.org is information on how to use the software. BCP used to pull together (federated access) data from many other marts at one place. You can do the same on your server as long as you know the URL of the marts you want to plug into your portal. e.g.
For Ensembl Marts hosted here:
the starting point would be to access its registry from the RESTful web service call:
You can integrate any of these listed marts in the registry into your own registry file and reconfigure your BioMart instance.
Best,
Syed