Get all Wikidata items that are an instance of a given item

Question

Wikidata has an item called smartphone model.
I want to get all instances of it.

QUESTION: How to get the identifiers of the instances programmatically, using the live server?

Preferably not including false positives that show up in WhatLinksHere but are in the "Wikidata:" namespace rather than the main namespace.

Answer 1

Your question specifies the "Mediawiki API" but this is not possible.

Wikidata has a SPARQL query service at https://query.wikidata.org

The query that you want is:

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>

SELECT DISTINCT ?item
WHERE {
    ?item wdt:P31/wdt:P279* wd:Q19723451
}

This will list the Items that are an 'instance of'(P31) 'smartphone model'(Q19723451) or an 'instance of' a 'subclass of'(P279) 'smartphone model'(Q19723451).