I think in this case there isn’t really a tool to do so but Strapi is certainly capable of handling that type of interaction (assuming infromatica has it’s own API and has the ability to also make it’s own API requests, which is should if it’s tying into Salesforce and Workday).
I think you will probably need some fields in the user model to be able to tie the Strapi user record to the outside resources and you are likely going to need to write some custom backend code within Strapi to handle the integration but I don’t think it would be all too difficult.
We don’t currently have a package to handle that type of integration currently and I’ve not seen any example of the usage of informatica yet, but if you do manage to get something running with it, I think it would be a great thing to share!
Naturally those of us in the community are certainly open to any specific questions you have about the implementation.