Steps to Create and Use mock server using Postman API

Step 1: Open the postman application on your computer then click on the mock servers tab on the left side navigation bar.

Step 2: To create a new mock server, click on the create mock server or the plus symbol beside the collections tab.

Step 3: Create mock request:
To create a sample mock request, you’ll need to understand the following concept:

• Request Method: This dropwown allows you to select our prefared http methods. example: GET, POST, PUT, DELETE
• Request URL: This is used to specify the exact route in our mock endpoints.
• Response Code: http response codes ranging from 100 to 599 can be used depending on our desired response
• Response Body: This input field is used to pass a sample json response

Now that you have understood the above concept, We are going to modify the input fields. for the purpose of this article, we will create a mock api to get the list of users in our application.

Start by setting the request url input field to users. Next copy JSON response below and paste in the response body. Then click next to continue.

Step 4: Mock server configuration:

Within the configuration tab, we are going to set the mock server name to mock users api. You can set it to your preffared name. next, select the Save the mock server URL as an environment variable checkbox. now that you have completed the configuration, click on the create mock server button on your bottom right. before proceeding to the next step, let us understand some important concept in the configuration.

• Environment: Environments help manage variables like URLs or tokens.
• Make mock server private: is used when you want to make your mock api secure by adding authentication
• Simulate fixed network delay: this feature for testing how your application behaves under different network conditions. It allows you to identify potential issues related to network latency and ensure that your application handles delays appropriately.

Step 5: Test mock request:

Navigate to the collections tab on the left side of the navigation bar, then click on the mock server api collection which we created and select users.

Next, click on the send button on the top right hand of your postman to see sample JSON request.

Postman, a comprehensive API platform, includes a robust API client for exploring, testing and defining requests. Its notable feature is the ability to create mock servers, simulating API responses for testing and development purposes. Developers can organize requests in collections, generate mock servers, and customize settings to mimic desired API behavior. This functionality proves invaluable when testing against realistic responses in the absence of a fully developed or available API.