{"id":779,"date":"2026-10-30T12:30:26","date_gmt":"2026-10-30T07:00:26","guid":{"rendered":"https:\/\/www.itvedant.com\/blog\/?p=779"},"modified":"2026-10-27T12:41:50","modified_gmt":"2026-10-27T07:11:50","slug":"api-testing-using-postman-beginners","status":"publish","type":"post","link":"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/","title":{"rendered":"How to Perform API Testing Using Postman: A Step-by-Step Guide for Beginners"},"content":{"rendered":"\n<p>When you log in to an application, search for a product or complete an online payment, different software systems often communicate through Application Programming Interfaces (APIs).<\/p>\n\n\n\n<p>An API allows applications to exchange data and perform operations without requiring users to understand the underlying technical processes.<\/p>\n\n\n\n<p>But what happens if an API returns incorrect information or stops responding?<\/p>\n\n\n\n<p>That is where API testing becomes important.<\/p>\n\n\n\n<p>In this guide, you will learn how to perform API testing using Postman, understand HTTP methods and validate API responses through practical examples.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#What_Is_API_Testing\" title=\"What Is API Testing?\">What Is API Testing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#What_Is_Postman\" title=\"What Is Postman?\">What Is Postman?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_1_Install_and_Open_Postman\" title=\"Step 1: Install and Open Postman\">Step 1: Install and Open Postman<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_2_Test_a_GET_Request\" title=\"Step 2: Test a GET Request\">Step 2: Test a GET Request<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_3_Test_a_POST_Request\" title=\"Step 3: Test a POST Request\">Step 3: Test a POST Request<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_4_Understand_HTTP_Status_Codes\" title=\"Step 4: Understand HTTP Status Codes\">Step 4: Understand HTTP Status Codes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_5_Write_Automated_Test_Scripts\" title=\"Step 5: Write Automated Test Scripts\">Step 5: Write Automated Test Scripts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_6_Test_Response_Time\" title=\"Step 6: Test Response Time\">Step 6: Test Response Time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_7_Practice_Negative_Testing\" title=\"Step 7: Practice Negative Testing\">Step 7: Practice Negative Testing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Step_8_Create_a_Beginner_API_Testing_Project\" title=\"Step 8: Create a Beginner API Testing Project\">Step 8: Create a Beginner API Testing Project<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Common_API_Testing_Mistakes\" title=\"Common API Testing Mistakes\">Common API Testing Mistakes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Checking_Only_the_Status_Code\" title=\"Checking Only the Status Code\">Checking Only the Status Code<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Ignoring_Negative_Test_Cases\" title=\"Ignoring Negative Test Cases\">Ignoring Negative Test Cases<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Hardcoding_Sensitive_Information\" title=\"Hardcoding Sensitive Information\">Hardcoding Sensitive Information<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Not_Validating_JSON_Data\" title=\"Not Validating JSON Data\">Not Validating JSON Data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Ignoring_API_Documentation\" title=\"Ignoring API Documentation\">Ignoring API Documentation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Frequently_Asked_Questions\" title=\"Frequently Asked Questions\">Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#1_Can_beginners_learn_API_testing_with_Postman\" title=\"1. Can beginners learn API testing with Postman?\">1. Can beginners learn API testing with Postman?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#2_Is_coding_required_for_API_testing\" title=\"2. Is coding required for API testing?\">2. Is coding required for API testing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#3_What_is_the_difference_between_GET_and_POST\" title=\"3. What is the difference between GET and POST?\">3. What is the difference between GET and POST?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#4_Can_Postman_be_used_for_automation_testing\" title=\"4. Can Postman be used for automation testing?\">4. Can Postman be used for automation testing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#5_Is_API_testing_useful_for_software_testing_careers\" title=\"5. Is API testing useful for software testing careers?\">5. Is API testing useful for software testing careers?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.itvedant.com\/blog\/api-testing-using-postman-beginners\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_API_Testing\"><\/span>What Is API Testing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>API testing is the process of verifying that an API behaves according to its requirements.<\/p>\n\n\n\n<p>Testers check whether the API returns the expected responses, handles invalid data correctly and enforces appropriate access controls.<\/p>\n\n\n\n<p>For example, an e-commerce application&#8217;s API might allow users to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Retrieve product details<\/li>\n\n\n\n<li>Add products to a shopping cart<\/li>\n\n\n\n<li>Create an order<\/li>\n\n\n\n<li>View previous orders<\/li>\n\n\n\n<li>Update account information<\/li>\n<\/ul>\n\n\n\n<p>API testing helps verify that these operations work correctly.<\/p>\n\n\n\n<p>Unlike user interface testing, API testing focuses directly on the interactions between software components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_Postman\"><\/span>What Is Postman?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Postman is an API development and testing platform that allows users to create HTTP requests, inspect responses and automate checks.<\/p>\n\n\n\n<p>Using Postman, testers can examine:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>HTTP status codes<\/li>\n\n\n\n<li>Response bodies<\/li>\n\n\n\n<li>Response headers<\/li>\n\n\n\n<li>JSON data<\/li>\n\n\n\n<li>Authentication behavior<\/li>\n\n\n\n<li>Response times<\/li>\n\n\n\n<li>Error messages<\/li>\n<\/ul>\n\n\n\n<p>It is useful for both manual API exploration and repeatable test execution.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_1_Install_and_Open_Postman\"><\/span>Step 1: Install and Open Postman<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Download Postman from its official website or use a supported web-based workflow.<\/p>\n\n\n\n<p>Create a workspace for your practice project.<\/p>\n\n\n\n<p>Next, create a collection named <strong>Beginner API Testing Practice<\/strong>.<\/p>\n\n\n\n<p>Collections help organize related API requests.<\/p>\n\n\n\n<p>For this tutorial, we will use the free public testing API at:<\/p>\n\n\n\n<figure class=\"wp-block-embed\">https:\/\/jsonplaceholder.typicode.com<\/figure>\n\n\n\n<p>JSONPlaceholder provides fictional data that developers can use to practice HTTP requests.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_2_Test_a_GET_Request\"><\/span>Step 2: Test a GET Request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>GET requests retrieve information from an API.<\/p>\n\n\n\n<p>In Postman:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Create a new HTTP request.<\/li>\n\n\n\n<li>Select GET as the request method.<\/li>\n\n\n\n<li>Enter the URL below.<\/li>\n\n\n\n<li>Click Send.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-embed\">https:\/\/jsonplaceholder.typicode.com\/posts\/1<\/figure>\n\n\n\n<p>You should receive a JSON object containing properties such as:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"userId\": 1,\n  \"id\": 1,\n  \"title\": \"...\",\n  \"body\": \"...\"\n}<\/code><\/pre>\n\n\n\n<p>The exact title and body values depend on the endpoint&#8217;s response.<\/p>\n\n\n\n<p>Check the status code, response content and headers.<\/p>\n\n\n\n<p>A successful GET request will normally return HTTP 200.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_3_Test_a_POST_Request\"><\/span>Step 3: Test a POST Request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>POST requests are commonly used to submit data to a server.<\/p>\n\n\n\n<p>Create another request in Postman and select POST.<\/p>\n\n\n\n<p>Use:<\/p>\n\n\n\n<figure class=\"wp-block-embed\">https:\/\/jsonplaceholder.typicode.com\/posts<\/figure>\n\n\n\n<p>Open the Body tab, select raw and choose JSON.<\/p>\n\n\n\n<p>Enter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"title\": \"API Testing Practice\",\n  \"body\": \"Learning API testing with Postman\",\n  \"userId\": 1\n}<\/code><\/pre>\n\n\n\n<p>Click Send.<\/p>\n\n\n\n<p>For this testing service, the API simulates creating a resource and normally returns HTTP 201 Created, including a generated ID.<\/p>\n\n\n\n<p>Important: JSONPlaceholder is a mock API. POST operations do not persist data in a real database.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_4_Understand_HTTP_Status_Codes\"><\/span>Step 4: Understand HTTP Status Codes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>API testers should be familiar with commonly used response codes.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Status Code<\/th><th>Meaning<\/th><\/tr><tr><td>200<\/td><td>Request completed successfully<\/td><\/tr><tr><td>201<\/td><td>Resource created<\/td><\/tr><tr><td>204<\/td><td>Successful response with no content<\/td><\/tr><tr><td>400<\/td><td>Bad request<\/td><\/tr><tr><td>401<\/td><td>Authentication required or invalid<\/td><\/tr><tr><td>403<\/td><td>Access forbidden<\/td><\/tr><tr><td>404<\/td><td>Resource not found<\/td><\/tr><tr><td>500<\/td><td>Internal server error<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>A status code alone is not enough to determine whether an API behaves correctly.<\/p>\n\n\n\n<p>For example, an API might return 200 but include incorrect user information.<\/p>\n\n\n\n<p>Testers should validate both the response code and returned data.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_5_Write_Automated_Test_Scripts\"><\/span>Step 5: Write Automated Test Scripts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Postman supports JavaScript-based assertions.<\/p>\n\n\n\n<p>Open the GET request and select <strong>Scripts \u2192 Post-response<\/strong>.<\/p>\n\n\n\n<p>Add:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pm.test(\"Status is 200\", function () {\n  pm.response.to.have.status(200);\n});\n\npm.test(\"Correct post ID\", function () {\n  const data = pm.response.json();\n  pm.expect(data.id).to.eql(1);\n});\n\npm.test(\"Title is present\", function () {\n  const data = pm.response.json();\n  pm.expect(data.title).to.be.a(\"string\").and.not.empty;\n});<\/code><\/pre>\n\n\n\n<p>Send the request again.<\/p>\n\n\n\n<p>Postman will execute the tests and display the results.<\/p>\n\n\n\n<p>These checks confirm that the API returns HTTP 200, contains the expected post ID and includes a non-empty title.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_6_Test_Response_Time\"><\/span>Step 6: Test Response Time<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>You can also inspect request duration.<\/p>\n\n\n\n<p>For example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pm.test(\"Response time below 2000 ms\", function () {\n  pm.expect(pm.response.responseTime).to.be.below(2000);\n});<\/code><\/pre>\n\n\n\n<p>This checks whether the response was received in less than two seconds.<\/p>\n\n\n\n<p>The threshold is an illustrative learning example, not an industry-wide benchmark.<\/p>\n\n\n\n<p>Actual performance requirements depend on the application, network conditions and service-level objectives.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_7_Practice_Negative_Testing\"><\/span>Step 7: Practice Negative Testing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Positive testing checks whether valid requests work.<\/p>\n\n\n\n<p>Negative testing checks how the system handles invalid or unexpected inputs.<\/p>\n\n\n\n<p>Examples include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing required fields<\/li>\n\n\n\n<li>Incorrect data types<\/li>\n\n\n\n<li>Invalid authentication tokens<\/li>\n\n\n\n<li>Unsupported HTTP methods<\/li>\n\n\n\n<li>Non-existent resource IDs<\/li>\n\n\n\n<li>Requests without required permissions<\/li>\n<\/ul>\n\n\n\n<p>For example, try requesting a non-existent resource:<\/p>\n\n\n\n<figure class=\"wp-block-embed\">https:\/\/jsonplaceholder.typicode.com\/posts\/999999<\/figure>\n\n\n\n<p>Inspect the response and verify it against the API&#8217;s documented behavior.<\/p>\n\n\n\n<p>Do not assume every service handles missing resources identically.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_8_Create_a_Beginner_API_Testing_Project\"><\/span>Step 8: Create a Beginner API Testing Project<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Build a collection containing:<\/p>\n\n\n\n<p><strong>Test Case 1:<\/strong> Retrieve an existing post.<\/p>\n\n\n\n<p>Expected result: HTTP 200 with valid JSON data.<\/p>\n\n\n\n<p><strong>Test Case 2:<\/strong> Retrieve an unavailable post.<\/p>\n\n\n\n<p>Expected result: A response consistent with the API&#8217;s missing-resource specification.<\/p>\n\n\n\n<p><strong>Test Case 3:<\/strong> Submit a valid POST request.<\/p>\n\n\n\n<p>Expected result: HTTP 201 and the expected response structure.<\/p>\n\n\n\n<p><strong>Test Case 4:<\/strong> Validate required JSON fields.<\/p>\n\n\n\n<p>Expected result: All mandatory fields are present and use the correct data types.<\/p>\n\n\n\n<p><strong>Test Case 5:<\/strong> Check request duration.<\/p>\n\n\n\n<p>Expected result: Response time satisfies the threshold established for the exercise.<\/p>\n\n\n\n<p>Save your requests and test scripts in a Postman collection.<\/p>\n\n\n\n<p>You can export a sanitized collection to demonstrate your testing approach in a portfolio. Never include passwords, authentication tokens or other credentials.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_API_Testing_Mistakes\"><\/span>Common API Testing Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Checking_Only_the_Status_Code\"><\/span>Checking Only the Status Code<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A successful HTTP response does not guarantee correct business logic.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_Negative_Test_Cases\"><\/span>Ignoring Negative Test Cases<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Applications should handle incorrect inputs and unauthorized requests appropriately.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Hardcoding_Sensitive_Information\"><\/span>Hardcoding Sensitive Information<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Credentials should be managed securely rather than included in shared collections.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Not_Validating_JSON_Data\"><\/span>Not Validating JSON Data<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Check values, structures, data types and relevant business rules.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_API_Documentation\"><\/span>Ignoring API Documentation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Tests should be based on documented requirements, not assumptions about how the API should behave.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Can_beginners_learn_API_testing_with_Postman\"><\/span>1. Can beginners learn API testing with Postman?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes. Postman provides a visual interface that makes it possible to start testing HTTP APIs before learning advanced automation frameworks.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Is_coding_required_for_API_testing\"><\/span>2. Is coding required for API testing?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Basic API requests can be tested without writing code. JavaScript is useful when creating automated assertions in Postman.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_What_is_the_difference_between_GET_and_POST\"><\/span>3. What is the difference between GET and POST?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>GET retrieves a representation of a resource. POST submits data to a resource, often to create or process information.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Can_Postman_be_used_for_automation_testing\"><\/span>4. Can Postman be used for automation testing?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes. Postman supports automated assertions, collections and integration with command-line or continuous integration workflows.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Is_API_testing_useful_for_software_testing_careers\"><\/span>5. Is API testing useful for software testing careers?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes. 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07:11:50","updated":"2026-10-30 07:16:03"},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.itvedant.com\/blog\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.itvedant.com\/blog\/category\/software-testing\/\" title=\"Software testing\">Software testing<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHow to Perform API Testing Using Postman: A Step-by-Step Guide for Beginners\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.itvedant.com\/blog"},{"label":"Software testing","link":"https:\/\/www.itvedant.com\/blog\/category\/software-testing\/"},{"label":"How to Perform API Testing Using Postman: A Step-by-Step Guide for 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