Twitter开发2

There are different API families

The standard (free) Twitter APIs consist of REST APIs and Streaming APIs.

The enterprise (paid subscription) APIs include filtered firehose, historical search and engagement APIs for deeper data analytics, listening and other enterprise business applications. 

The premium (pay as you go) APIs consist of reliable and affordable versions of enterprise APIs, allowing your business to grow with your usage.  

Additionally, there are some families of APIs (such as the Ads API) which require applications to be whitelisted in order to make use of them.