Do you want to know more about APIs? We’re here to help. Let’s start at the beginning.
APIs, or Application Programming Interfaces, are software tools that allow two applications to communicate with one another. This communication allows the two applications to exchange data, which can be used to create new features or improve existing ones.
It’s important to note that an API is not a product in and of itself. Rather, an API is a set of specifications that defines how two pieces of software should interact with one another.
So, in order to understand what an API is and how it works, we need to understand the concepts of programming languages, APIs, and their interactions. 
What Is An API?
An API is a set of instructions that allow two pieces of software to interact with one another. In other words, an API is a set of commands that one piece of software uses to request information or services from another piece of software. An API is like a user manual for software; it tells the software how to interact with other software.
APIs are used by developers to create applications and integrate third-party services into their own applications. This allows developers to create faster and more efficient applications without having to build everything from scratch.
What Is An API key?
An API key is a unique string of characters that identifies a user or application when using an API. An API key is used by the server to identify who is making the request and to ensure that only authorized users can access the API.
Without an API key, the server would have no way of knowing who was making the request.
How Do APIs Work?
APIs work by exchanging data between two systems. The systems are connected by an API request (also known as an API call). The request contains information about what data is being requested and where it should be sent.
The system receiving the request then sends back the data in the form of an API response (also known as an API answer). The response contains all the information that was requested by the system making the request. 
Why FlightLabs?
FlightLabs API can be extremely useful for developers looking to add flight search and booking functionality to their applications. It is the most popular API in the market, works with most programming languages, and even has an endpoint to look for “best flights” available.
By leveraging a travel API like this, developers can easily access vast amounts of flight data and integrate it into their applications, providing users with an easy and efficient way to find the best flights and prices available.
Here are some ways in which travel APIs can help developers add flight search and booking functionality to their applications:
- Access to real-time data: Travel APIs provide developers with access to real-time flight data, including prices, schedules, and availability. This allows developers to provide users with accurate and up-to-date information, helping them find the best flights and prices available.
- Seamless integration: Travel APIs can be easily integrated into existing applications, allowing developers to quickly add flight search and booking functionality to their platforms without the need to build the functionality from scratch.
- Increased efficiency: By using a travel API, developers can reduce the time and effort required to build and maintain their own flight search and booking system. This frees up time and resources that can be used to focus on other areas of the application.
- Improved user experience: By providing users with access to real-time flight data and an easy-to-use interface, developers can create a seamless and intuitive user experience, improving user engagement and retention. The “Best Flights” Endpoint is sure an amazing tool.
Also published on Medium.