How the MWAPI is technically implemented? IE is it some Blazegraph extension or is there some externeal code in github etc?
Topic on Talk:Wikidata Query Service/User Manual/MWAPI
It's a Blazegraph extension that you can find here: https://github.com/wikimedia/wikidata-query-rdf/tree/master/blazegraph/src/main/java/org/wikidata/query/rdf/blazegraph/mwapi