How To Make.get.and Post Calls In R

R Programming

Hey there! Today, I want to dive into the wonderful world of making GET and POST calls in R. As a data enthusiast, I’ve found that being able to interact with APIs and web services is a vital part of my work. So, let’s roll up our sleeves and explore how to do this in R.

GET Requests

First, let’s talk about making GET requests. In R, we can use the httr package to do this. Here’s a simple example of how it’s done.

response <- GET("")

Here, we're using the GET function from the httr package to send a GET request to The response object will contain the data returned from the API.

POST Requests

Next, let's move on to making POST requests. This is useful when we need to send data to a server, such as when submitting a form. Here's an example of how we can accomplish this in R.

response <- POST("", body = list(name = "John", age = 30))

In this example, we're using the POST function to send a POST request to and including some data in the request body.

Working with Responses

Once we've made our requests, we need to handle the responses. The response object contains information such as the HTTP status code, headers, and the actual response content. We can extract specific information from the response as needed.

Dealing with Authentication

When working with APIs, we often need to handle authentication. The httr package provides functions for setting headers, authentication credentials, and handling cookies to facilitate this process.

Handling Errors

It's important to gracefully handle errors when interacting with APIs. The httr package allows us to check for common HTTP errors and take appropriate action based on the response received.


Well, there you have it! Making GET and POST calls in R can open up a world of possibilities for data manipulation and analysis. Whether you're fetching data from a web service or sending data to a server, the httr package equips us with the tools we need to interact with APIs seamlessly. So, go ahead and give it a try in your own R projects!