About

A Web Api is generally a synonym for an API based on the HTTP protocol. See the list

List

Technology:

• REST. A HTTP request with the API request expressed in the URL properties, HTTP header and or HTTP body
• Web Service - Simple Object Access Protocol (SOAP). A HTTP request with the API request expressed in XML as body
• Web Socket. This is more used in case of real time communication (not to get data)

Open Data

For the open API, see (Open|Free) Data Set