See the "Article candidates" column in Web-APIs-Hub.
The four articles @Spage is considering:
- T115435: Showcase/inspire: presenting Wikidata knowledge
- T93320: Showcase/inspire: rendering Wikipedia using RESTBase ?
spage's initial prioritization came from talking to WMF staff, this will be re-prioritized depending on T114017: Map current use of Wikimedia web APIs.
It's a wiki, anyone can work on these or other articles; see Web APIs hub/Contributing.