An HTTP message is a common means by which two systems, usually a server and a client, exchange data. We typically refer to each HTTP message as an HTTP request or an HTTP response. Webhook HTTP requests are a specific subset of HTTP requests which transfer data between systems based on events in those systems.In simple terms, an API is a set of rules that allow one application to talk to another, while a webhook is a way for an app to provide other applications with real-time information.The main difference between both is the callback URL. POST request does not have a callback URL but webhook has a callback URL. Example: I have to update the DB, and I created a post request. In logic App, my post request is completed movement I receive 200 or 202 in response.

What is webhooks used for : Webhooks are automated messages sent from apps when something happens. They have a message—or payload—and are sent to a unique URL—essentially the app's phone number or address. Webhooks are almost always faster than polling, and require less work on your end.

Is REST API a webhook

REST API follows rules for API design, while a webhook is part of API functionality. REST API requires a user data request, unlike a webhook that sends data without request.

Is a webhook just an API : Webhooks automatically send data in response to a specific event, without any request from another software. Webhooks are a subset of APIs and are therefore far more limited than APIs—they can only send information. APIs are more versatile.

Webhooks are "user-defined HTTP callbacks". They are usually triggered by some event, such as pushing code to a repository, a comment being posted to a blog and many more use cases.

Polling requests are made by a client, while webhook requests are made by a server. Webhooks are also automatically triggered when an event occurs, whereas polling is set up to run at fixed intervals and runs whether there is a new event or not.

What is the difference between HTTP long polling and webhook

Key Differences​ Initiation of Communication: Webhooks are server-initiated, while long polling is initiated by the client. Real-Time Updates: Both provide real-time updates, but webhooks do so as a response to specific events, and long polling does it based on client requests.A webhook can be configured to communicate information from a frontend source to a backend source. For example, a webhook can communicate data from a landing page, such as a web form, and send that information to a Discord server or Slack channel.Unfortunately, webhooks aren't without their flaws. Here are a few to keep in mind: Unavailable: Many applications don't support webhooks. Unreliable: When the application with the registered webhook is down, any events that take place may fail to get accounted for and communicated back to the receiving application(s)

While RESTful APIs are commonly implemented over HTTP(S), it's worth noting that the term "REST" itself does not mandate the use of HTTP. In theory, RESTful principles could be applied to other protocols as well, such as SMTP or FTP.

What’s HTTP mean : Hypertext Transfer ProtocolHTTP / Full name

The Hypertext Transfer Protocol (HTTP) is the foundation of the World Wide Web, and is used to load webpages using hypertext links. HTTP is an application layer protocol designed to transfer information between networked devices and runs on top of other layers of the network protocol stack.

Why are webhooks better than polling : Webhooks are also automatically triggered when an event occurs, whereas polling is set up to run at fixed intervals and runs whether there is a new event or not. Polling can be resource-intensive and you need to make calls on whether the efforts will be fruitful or not.

What is the disadvantage of webhooks

Webhooks also come with disadvantages: Data or notifications may not always be sent to the destination system. If the source system experiences downtime, it might not capture the relevant data or notifications; when this happens, the notifications or data won't get sent to the destination system.

While HTTP is a protocol that defines how messages are formatted and transmitted, REST is an architectural style that defines how resources are accessed and manipulated. There are various types of APIs, such as Open APIs, Internal APIs, Partner APIs, Composite APIs, RESTFUL, JSON-RPC, XML-RPC, and SOAP.A web API is an API that can be accessed using the HTTP protocol. This is a broad category—really too broad to be very useful. Not all APIs are web APIs; some APIs are used only to communicate between two applications on the same computer, never making use of a web connection.

Why would I use HTTP : HTTP or “HyperText Transfer Protocol” is a fundamental element of the world wide web. It allows your web browser (i.e. Google Chrome, Mozilla Firefox, Apple Safari or Internet Explorer) to communicate with the server where any given website is hosted.