Most of the API features require an API key. API requests are made over HTTP. Data features return JSON or XML. WunderMap layer features return image files. This documentation is full of examples of how to use API features. See code samples for several languages, and user-generated code and libraries.

Multiple API features can be combined into a single HTTP request. This is an easy way to economize your requests. The Data Features page documents how features can be combined into a single request.

API Info
Mashups: 1 mashups made with this API
API homepage: http://www.wunderground.com/weather/api/
Developer key required: Yes