Is there any way I can access the thumbnail picture of any wikipedia page by using an API? I mean the image on the top right side in box. Is there any APIs for that?
Like Anuraj mentioned, the pageimages parameter is it. Look at the following url that'll bring about some nifty stuff:
https://en.wikipedia.org/w/api.php?action=query&prop=info|extracts|pageimages|images&inprop=url&exsentences=1&titles=india
Her are some interesting parameters: