API

Question

API is for example a algorithm that can call a data and send it back or?
If this is not right please tell me what API is and for example when a flight booking website compare sites to give us the cheapest price they use the api from the owner but how do they do this and do the owner have to be asked? (I hope my english is understandable)

thank you for reading/answering and please dont send me a link i need a explination.

Answer 1

I just want to kow what a Api is and how people use the api from others and with which tecnology

Answer 2

How about a twitter api that gives you the possiblity to show certain tweets in your application (for c# look at .net).
https://dev.twitter.com/overview/api

or a weather api that allows you to show the weather in your application
https://www.wetteronline.de/weather-api

https://openweathermap.org/api

flight information
http://www.itnext.in/articles/1003456/9-flight-apis-you-can-create-apps-on-to-get-live-flight-data

Answer 3

I guess, for this kind of servis, you need registration. But send link or google name of service + api

Answer 4

It isn't an algorithm but interface for communication between sevises . I recomend to read an article about it

Answer 5

API is a abbreviation for application programming interface. It is not a standard. A organisation who wants you, to show their data or control their machines needs to write a API and its documentation. Sometimes the API is available for free, sometimes you need a payed contract.

What do you want do to do ?