The What3Words Python SDK interacts with the API to convert 3- word addresses into coordinates. All coordinates in latitude and longitude pairs, show in standard WGS-84 (as commonly used worldwide in GPS systems).
Cloud APIs are all about the endpoints: some services follow the current trend of providing a RESTful end point, others use older protocols such as RPC or SOAP, some use newer - push focused - endpoints like WebSockets or HTTP Streaming, others may offer a number of different endpoints to meet different requirements and some just use what seems to be best for a specific job which might mean not strictly following protocol rules. But is providing an endpoint to a service alone good enough? Should a developer really have to care about how a service is built or accessed when they can use a client library?
Flat maps have a hard time communicating elevation changes, but now you can access the data to visualize as you want. Google Maps added two elevation services, bringing you the meters above sea level for any point on earth.