How do webhooks work?
The easiest way to understand webhooks is to look into the mechanics of how they work.
With a webhook, there is a programmed trigger. That trigger could be a new user clicking on a button. It could be a time of day. It could be inputting a URL and hitting “enter.” It could be just about anything.
When that event occurs is seen by the webhook, it will then initiate and carry out its programming, performing any number of tasks that are assigned according to the specific event.
Keep in mind that these tasks revolve around communication. So, webhooks are great for downloading or uploading data updates to or from an external system when a trigger is met.
As an example, a webhook could be designed to load the weather. The application is in charge of displaying the weather and responding to things that you do.
But, when you open the app, it needs to download the most recent push data from a web service in order to make sure the data is up to date.
In this example, opening the app is the trigger. Following the specific event, webhooks then begin relaying data requests to connect your app to its web server and then download any and all needed data to update what you see on external applications.
In that way, you get real-time weather reports, even though your phone (or another device) doesn’t have thermometers and wind gauges built into it.
Advantages of using webhooks
The key to using webhooks is that they don’t do a lot of back and forth with real-time data. The direction really flows in one direction. That can simplify tasks that don’t depend on data-driven responses.
That makes webhooks faster and more efficient in terms of communication and data efficiency. They use less power and won’t consume as much data as metered devices.
That simplicity can help an entire application run faster and consume fewer resources. It can also make programming the webhook a lot easier. Basically, less is more. When you don’t need something beyond what the webhook can do, it’s probably streamlining your processes.
What is an application programming interface (API)?
API stands for application programming interface and is also something designed to carry out actions. While webhooks are built around triggers and one-way data streams, APIs are all about two-way communication.
The point of an API is that it maintains two-way communication in robust ways. So, the actions built around APIs can depend on specific bits of new data that are received from a source.
APIs can handle larger volumes of data, more intricate communication between devices, and more complicated functions. All of that stems from the communication design that is so fundamental to APIs and how they work.
How do APIs work?
APIs are like a layer of software between an application and a web server. Someone uses the application, and they do something that will request data from the server. That triggers the API, and it handles communication as needed for whatever you are doing.
Let’s say you’re playing a game of Battleship with someone else through a phone app. When you make a move, the app needs to tell the other player. The API triggers so that you can send and receive new data from the server, and that enables you and the other player to keep up with changes in the game.
Webhook vs API
With the basics covered, what are the primary similarities and differences between APIs and webhooks? You already know that they differ in direction of communication, but that simple difference leads to a whole lot more.
Similarities
APIs and webhooks are both designed to send data between an application and a server. In either case, something starts up the communication tool and sends data as needed for any given function.
This can be uploading and/or downloading data. So any application can get necessary data from a website, as an example. The way they communicate is also very similar. They’re using the same protocols to establish connections and send data.
In fact, the similarities are so strong that there are plenty of scenarios where you might debate which is the proper tool for web-enabled communications. It’s not always clear.