Bing found the following results
Getting started with Wikimedia APIs - API Portal
API - Wikipedia
Is there a Wikipedia API? - Stack Overflow
How To Use The Wikipedia API - Code Snippet
A Beginner's Guide To The Wikipedia API | Wikilocation.org
Learn - API Portal - Wikimedia
Getting Started with Python's Wikipedia API - Stack Abuse
How can I get Wikipedia content using Wikipedia's API?
Web API - Wikipedia
Searching for Wikipedia articles using Python - API Portal