Intercom already has the Full name of users, and as per this article, is capable of splitting out first name and last name in outbound messaging. Morever, when you export users as a CSV, Intercom by default includes separate columns for First Name and Last Name. However, this is not possible within Intercom itself. There should be a way to select First Name and Last Name as columns (since clearly Intercom has those stored somewhere anyway), which would also allows for easy mapping of those fields to 3rd party systems. In my case, I want to sync Intercom users with a referral system. It makes more sense to only map users’ first names to the referral system, however it is only capable of doing full names, which is a bit weird in this use case.
There is another workaround which is the custom attribute and API method however this seems superfluous given Intercom already has first and last name stored, and also more work than necessary.