Introduction to Golang apis !

Here is an example of a simple API written in Go:

A simple api

package main

import (

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        person := Person{
            Name: "John Doe",
            Age:  30,

        json, _ := json.Marshal(person)
        fmt.Fprintf(w, string(json))

    http.ListenAndServe(":8080", nil)

In this example, we define a Person struct that has two fields: Name and Age. We then create an instance of this struct and marshal it into JSON format using the json package. Finally, we create an HTTP server that listens on port 8080 and responds with the JSON representation of the Person struct when it receives a request.

To test this API, you can start the server by running the go run command on the file containing the code above, and then send a request to http://localhost:8080/ using a tool such as curl. You should receive a response in JSON format containing the information about the Person struct.

$ curl http://localhost:8080/
{"name":"John Doe","age":30}

This is just a simple example to illustrate how to create an API in Go. A more complete API would likely include additional functionality, such as handling different HTTP methods and providing a more robust response structure.

Why should I use golang for my api ?

There are several reasons why you might want to consider using Go for your API:

Go is a statically-typed language, which means that the type of a variable must be known at compile time. This can help catch bugs and errors early in the development process, making it easier to maintain and debug your code.

Go has built-in support for concurrent programming, which allows multiple processes to be executed simultaneously. This can make your API more efficient and scalable, allowing it to handle a large number of requests without performance degradation.

Go has a simple and clean syntax, which makes it easy to read and understand. This can make it easier for other developers to work on your code and contribute to your project.

Go has a growing community of users and a large ecosystem of libraries and frameworks. This means that you can easily find resources and support for your project, and that there are many third-party tools and packages available to help you build your API.
Overall, Go is a powerful and efficient language that is well-suited for creating APIs. Its support for concurrent programming, clean syntax, and growing ecosystem make it an attractive option for developers who want to build high-performance and scalable APIs.


An API, or application programming interface, is a set of rules and protocols that allow different software applications to communicate with each other. In the context of Go, an API refers to a set of packages and functions that allow a developer to create a Go application that can interact with other applications or services.

Go provides a standard library that includes a number of packages that can be used to create APIs. For example, the net/http package provides functions for creating an HTTP server and handling HTTP requests, making it easy to create a web-based API. Other packages, such as encoding/json, provide tools for encoding and decoding data in JSON format, which is commonly used for transmitting data over an API.

In addition to the standard library, there are also many third-party packages that can be used to create APIs in Go. These packages provide a wide range of functionality, from simple utility functions to more complex frameworks for building APIs.

Overall, Go's standard library and third-party packages make it easy to create powerful and efficient APIs. Its support for concurrent programming and built-in tools for working with common data formats make it a popular choice for developing APIs that can handle high volumes of traffic and complex data.

Edit this page on GitHub Updated at Thu, Dec 15, 2022