Learn How to Use Postman for Sending POST Requests

Understanding how to send a POST request in Postman is a crucial skill for any developer or tester. POST requests are typically used for submitting data to a server, such as creating new resources or uploading files.

What is a POST Request?

A POST request is an HTTP request method used for sending data to a target server. In RESTful APIs, POST requests are commonly employed to create new resources. Unlike GET requests, POST requests include a request body that contains the data submitted by the client.

Prerequisites

Before you begin, ensure you have completed the following preparations:

1. Install Postman: Download and install the software from the Postman website.
2. Available API Endpoint: Find an API endpoint that accepts POST requests. You can use public APIs such as JSONPlaceholder or a self-hosted test server.

Steps to Send a POST Request in Postman

Step 1: Create a New Request

Open Postman and click the “New” button at the top left, then choose “Request” to create a new request.

Step 2: Name the Request and Select a Collection

In the dialog box that appears, name your request and choose a collection to save it in. If you don’t have a collection, you can create a new one.

Step 3: Set the Request Method and URL

1. At the top of the request editor is a dropdown menu. By default, it shows “GET” . Click the dropdown menu and select “POST” .
2. In the text box to the right of the dropdown menu, enter the target URL.

Step 4: Add the Request Body

Click the “Body” tab, where you'll see several options. Select “raw” and ensure the dropdown menu to the right shows JSON. Then, enter the data you want to send into the text box.

Step 5: Send the Request

Once all configurations are done, click the “Send” button at the top right. Postman will then send this POST request to the target server.

Step 6: Review the Response

At the bottom of the Postman window, you will see the server's response. The response includes the status code (such as 201 Created), response headers, and the response body. Parsing this information will help you confirm whether the request was successful and understand the data returned by the server.

Additional Considerations

1. Verify Data Format: Ensure the data sent complies with the format required by the API documentation. For example, in JSON format, make sure all key-value pairs are correct.
2. Error Handling: If the request fails, check the status code and message in the response. For instance, a 400 Bad Request status code indicates that something is wrong with the request, making it unprocessable by the server.
3. Security: In real environments, avoid sending sensitive data over unencrypted connections (use HTTPS over HTTP). Additionally, for APIs requiring authentication, ensure authentication headers are correctly set.

Alternative Tools

Compared to Postman, Apidog stands out as a compelling solution for handling dynamic values and automatically generating JSON bodies. Apidog offers several noteworthy features, including time-saving automatic JSON body generation, which eliminates the need for manual work required to write requests. Users can choose from various predefined templates, streamlining the process and ensuring consistent JSON structures across different requests. Those interested should give it a try.

Effortless JSON Body Generation:

Apidog's automatic JSON body generation is a time-saving feature that eliminates the need for manual work required to write requests. Users can choose from various predefined templates, streamlining the process and ensuring consistent JSON structures across different requests.

Conclusion

In this tutorial, we learned how to send a simple POST request using Postman. Whether you're involved in front-end development, back-end development, or API testing, mastering this skill is extremely important. Utilize the powerful tool Postman to boost your efficiency and achieve your tasks more effectively.

Postman dramatically simplifies API testing and debugging, enhancing development efficiency. We hope this article helps you gain a more comprehensive understanding of and leverage Postman for sending POST requests, making your development process a more enjoyable journey.