There are the terms "MediaWiki web API" and "MediaWiki action API" on numerous mediawiki.org pages (most results likely due to the API template being included).
https://www.mediawiki.org/wiki/Template:API also calls it "MediaWiki action API".
https://www.mediawiki.org/api/ also lists an "Action API" . And a "REST API v1" while https://www.mediawiki.org/wiki/Template:API calls it "REST content API" instead.
https://www.mediawiki.org/wiki/API:Main_page also says that the action API "was known as the MediaWiki API, but there are now other web APIs available that connect to MediaWiki such as RESTBase and the Wikidata query service."
Question: So I guess that "action API" is the term to use? And "web API" the confusing generic term to kill in times of REST? As a new contributor, I'm mostly confused.
(Note to myself: I originally came here wondering about what' became T173948: Decide on fate of [[mw:API:Tutorial]].)
Queries on mw.org:
- https://www.mediawiki.org/w/index.php?search=%22rest+api%22&title=Special:Search&profile=default&fulltext=1
- https://www.mediawiki.org/w/index.php?search=%22web+api%22&title=Special:Search&profile=default&fulltext=1
- https://www.mediawiki.org/w/index.php?search=%22action+api%22&title=Special:Search&profile=default&fulltext=1