Using URL in Calling APIs

I tried using 
image_path = input('URL: ')               and

headers = {'Content-Type': 'application/json', 'Ocp-Apim-Subscription-Key': SUBSCRIPTION_KEY}

My intent was to pass on any url of any image from the internet as an input and to display the description of the image. It wouldn't work. OBVIOUSLY. Is it possible to make it work?