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How to Send JSON Data in Postman

Postman is a powerful API development and testing tool widely used by developers, testers, and API engineers in their daily workflows. It offers a user-friendly interface and rich features, making testing and debugging APIs efficient and straightforward.

This article aims to provide beginners with a step-by-step guide, enabling them to successfully send JSON requests in Postman. By mastering these fundamental steps, you will gain a better understanding of the API request process, enhancing their efficiency in API testing and development.

Step-by-Step Guide

Step 1: Install and Set Up Postman

Firstly, ensure that you have Postman installed. You can download and install the Postman application from the official website ( Once installed, open Postman and either create a new account or log in to your existing account.

Step 2: Create a New Request

On the main interface of Postman, you'll find a "+ New" button. Click on this button and select "Request" to create a new request. Give your request a meaningful name for easy identification in subsequent operations.

Postman Create a New Request

Step 3: Set Request Type to POST

In the request settings, you will find a dropdown menu. Select this menu and set the request type to "POST." This is because we will be sending JSON-formatted data to the server, and POST requests are commonly used for such data transmission.

Postman Set Request Type to POST

Step 4: Fill in the Request URL

In the request settings, there is a text box for entering the URL. Based on the documentation of the API you want to access, input the correct URL. Ensure the correctness of the URL to prevent the request from being sent to the wrong endpoint.

Postman Fill in the Request URL

Step 5: Add JSON Data to the Request Body

In the Postman interface, you'll see a tab labeled "Body." Click on this tab, select the "raw" format, and choose "JSON (application/json)" as the data type from the dropdown menu. Enter the JSON data you want to send in the text box.

Here's an example:

"name": "Add your name in the body"
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Add JSON Data to the Request Body

Step 6: Send the Request and View the Response

Click the "Send" button on the Postman interface. Postman will send a POST request to the specified API, and the server's response will be displayed below the interface. You can view information such as the status code and response body in the response.

Postman Send the Request and View the Response


When sending JSON requests in Postman, some common issues may arise. Here are some suggestions and solutions:

URL Errors: Ensure the entered URL is correct, including the protocol (http/https), domain, and path.

JSON Format Errors: Validate your JSON data for compliance. Use online JSON validation tools to check for syntax errors.

Request Type Errors: If the API documentation specifies using GET instead of POST, make sure to correctly set the request type.

Permission Issues: Check if your Postman account has the necessary permissions to access the required API.


Mastering the skill of sending JSON requests in Postman is crucial for effective API testing and development. Through the step-by-step guide provided in this article, readers should now be able to effortlessly create and send JSON requests, gaining a better understanding of the API interaction process.

Frequently Asked Questions

1. How do I import and export requests in Postman?

You can use Postman's import and export features to share requests in different environments. In Postman, click on the "Import" or "Export" button in the upper-left corner and follow the prompts.

2. What HTTP methods does Postman support?

Postman supports common HTTP methods such as GET, POST, PUT, DELETE, etc. When creating a request, you can choose the appropriate HTTP method.


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