Is there a Tumblr API call to get all posts with a certain tag (such as http://www.tumblr.com/tagged/new+york), similar to how I can get all posts from a specific blog (i.e http://demo.tumblr.com/api/read/json)
Unfortunately http://www.tumblr.com/tagged/new+york/api/read/json doesn't work.
It took me way longer to find this than it should have:
http://www.tumblr.com/docs/en/api/v2#tagged-method.
It's just about going to http://api.tumblr.com/v2/tagged?tag=gif with your API key.