What is API?

An API (Application Programming Interface) allows you to send requests to a remote data set, like querying a database. The response will then be delivered back to your own application in a standardized format. This is very helpful when you’re building an app or pulling metrics for reporting, because it means you can focus on presenting information in a unique or useful manner, rather than developing the underlying data set. For example, most weather apps get their weather forecast data from a weather API, rather than building weather stations themselves.

Of course, the fastest way to understand how APIs work is to try them out. While most APIs require access via API keys (which are similar to passwords), or have complex methods of authentication and authorization, there are also quite a few APIs with no requirements at all. This is especially useful for beginners, as it means you can start exploring different APIs right away. It is also useful for web developers looking to access a sample data set for their app without any red tape.

Simple of use

Make request and get response

Any platform

You can use any plaform and language

Instant response

Always actual data response

Last API

Open Library

Books, book covers and related data

Auth: ?
HTTPS: yes
CORS: no
https://openlibrary.org/developers/api
Transport for Switzerland

Official Swiss Public Transport Open Data

Auth: apiKey
HTTPS: yes
CORS: unknown
https://opentransportdata.swiss/en/
Dailymotion

Dailymotion Developer API

Auth: OAuth
HTTPS: yes
CORS: unknown
https://developer.dailymotion.com/
Satellite Passes

Query next satellite passes above you

Auth: ?
HTTPS: yes
CORS: yes
https://satellites.fly.dev
RandomUser

Generates random user data

Auth: ?
HTTPS: yes
CORS: unknown
https://randomuser.me
WorldCoinIndex

Cryptocurrencies Prices

Auth: apiKey
HTTPS: yes
CORS: unknown
https://www.worldcoinindex.com/apiservice
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