This is an epic for infrastructure work on the REST API.
I'm not sure it fits well together as an epic, since these user stories probably don't need to be done together. It may make sense to have different epics for clusters of user stories with a deliverable goal.
The personas for the user stories in this epic are more technical than the ones for the other epics.
Client Developer - A programmer writing software that calls the REST API.
API Developer - A MediaWiki core or extension developer writing REST API endpoints.
System Administrator - The operator of a MediaWiki installation, responsible for resource allocation and configuration.