is is possible to add third party verification to supplier registration post submission

Summary

Is it possible to add a call out to an external 3rd party, e.g. REST API call after an external supplier has registered?

Content

Is it possible to add a call out to an external 3rd party, e.g. REST API call after an external supplier has registered?

I'm thinking of a scenario say - Bob the Builder creates a supplier request

This then goes to approval process (i.e. the task SupplierExternalRegistrationApproval). Is is possible or has anyone tried adding a step in the process which would call an external API (in our case Experian's web service) and return a value for an approval notification?