API Testing

1 Courses 2 Projects 18 Hours


This course is designed to cover all aspects of API testing & Postman tool and also to provide users with the knowledge required to work with Postman tool at a professional level. This course addresses planning and performing API tests, developing the pre-test & post-test scripts using Postman, executing the API tests and generating HTML reports using different tools like Newman.

The course covers real-world best practices for effective use of Postman tool for API testing with practical examples demonstrated.

An assessment is included with the course and is a 30 minutes exam, 20 questions, multiple- choice exam which takes place on the final day of training program.

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Key Features

  • Flexible Schedule
  • 24 x 7 Lifetime Support
  • Certification
  • Instructor Led Training


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  • Course Introduction
  • Introduction to web application architecture
  • Introduction to
    • Client & Server model
    • HTTP & HTTPS protocols
    • SSL & TLS protocols
    • Hand-shake process
    • HTTP Request Headers
    • HTTP Response Headers
    • Request & Response Cookies
    • HTTP Methods/HTTP verbs
  • Safe methods vs Unsafe methods
    • GET
    • POST
    • PUT
    • PATCH
    • DELETE
  • Introduction to APIs
  • Where does an API reside i.e., middle-ware layer/business layer
  • Introduction to API architecture/Web-Services
    • REST API
    • SOAP API 
  • What is API testing?
  • Advantages of API testing
  • Testing techniques used in API testing
  • Definition of API --> Understanding Protocol, API URI, end points, Query Parameters, Resources, HTTP verbs, Request body, Authentication type
  • Why Postman for API Testing ?
  • What is Postman tool
  • Installation of Native Postman tool for Windows OS
  • Introduction to Postman landscape
  • Introduction to Postman Settings & GUI
  • Introduction to Postman API network & Postman Templates
  • An introduction to Workspaces (Personal, Team, Public, Private)
  • How to create and manage Workspaces
  • Invite to Workspaces
  • Leave Workspace & Delete Workspace
  • Collaboration of Workspaces
  • What are SOAP web-services/APIs
  • What is WSDL file
  • Installation of Wizdler tool as a chrome app for the chrome browser for Windows OS/Mac OS
  • Introduction to Wizdler tool
  • How to parse SOAP WSDL file using Wizdler tool
  • Testing SOAP APIs using Wizdler tool & Postman tool
  • Understanding Request headers & Response headers
  • Understanding Authentication API examples using Wizdler tool
  • Testing REST API request using Postman tool with HTTP protocol & HTTPS protocol
  • Testing SOAP API request using Postman tool
  • Validating Response Code, Response Description, Response Body, Cookies, Response Time, Response Size, HTTP Request Headers, HTTP Response Headers
  • Functional Testing of API’s (Positive & Negative Test Cases)
  • Understanding History tab in Postman tool [Save Responses, Delete, Clear All, Add]
  • REST API testing with authentication types [BASIC AUTH, DIGEST AUTH, ACCESS TOKEN]
  • Understanding query parameters on sending API request
  • Validating REST API that returns JSON/XML/HTML/IMAGES/DOCUMENTS with Postman client
  • Examples on validating response headers and status codes
  • What are Cookies & How to understand Cookies parameters
  • Analyzing Cookies after API response is received
  • Saving API responses in Postman client
  • Find & Replace option in Postman client
  • Postman – Browse view, Build view, Boot camp view, 2 pane view, console view
  • Introduction to Collections
  • Creating & Understanding Collections feature
  • Setting up Test Project & Collections with REST APIs
  • Setting up Test Project & Collections with SOAP APIs
  • Exporting & Importing collections in .JSON format, from Postman tool and to Postman tool
  • Share Collections [internal Workspaces and to external users]
  • Run Collections Remotely with Collection URL
  • View & Collaborate Collections documentation in Postman web dashboard
  • Introduction to Collection Runner 
  • Introduction to Collection- Changelog
  • Introduction to Collection Results - View/Download/Delete Historical Collection runs
  • Publishing Collections to Postman API Network & Templates
  • Unpublishing the Collections from Postman API Network & Templates
  • Create a Fork request, Create Pull request, Merge Changes in Postman tool
  • How to create Mock APIs using GET, POST, PUT, DELETE methods to simulate API response
  • Understanding cURL commands syntax for GET, POST, PUT, PATCH, DELETE HTTP methods
  • Deriving API URL and end point from cURL commands
  • Importing an API request from a browser into Postman tool
  • Importing an API request from a cURL command into Postman tool
  • Execution of imported cURL commands in the Postman tool
  • Introduction to Postman variables
    • Collection/Private variables [at different levels such as protocol, BaseURL, EndPoint, Request Headers, Request Body, Query Params, Authorization]
    • Global variables [at different levels such as protocol, BaseURL, EndPoint, Request Headers, Request Body, Query Params, Authorization]
    • Environment variables  [at different levels such as protocol, BaseURL, EndPoint, Request Headers, Request Body, Query Params, Authorization]
  • How to set and get collection/private variables through wizard & manual ways
  • How to set and get Global variables through pre-request scrips at all layers [API, Folder, Collection]
  • How to set & get Environment variables thro pre-request scrips at all layers [API, Folder, Collection]
  • Creating Global & Environment variables and its usage at API, Folder & Collection levels
  • How to use Postman proxy to record all API calls from a browser
  • Postman monitors- Scheduling the API testing periodically (Monitors)
  • How to create quick automation test scripts using reusable Java Scripts/code snippets
  • How to create Pre-request scripts using reusable Java Scripts/code snippets
  • API chaining of API requests
  • Grabbing the response body into string for advance validations
  • Data Driven API testing using external data sources
    • CSV
    • JSON
  • Performance/Load testing of API testing in Postman tool
  • Introducting delays for scheduled or continuous load API testing
  • Command line execution with Newman tool
  • Basic introduction to NPM tool & NodeJS
  • Installing NodeJS & Newman tool
  • Running a collection with Newman tool
  • Exploring and Execution of all CLI commands using Newman tool
  • Generating the API test report(s) using Newman tool
    • JSON/CL
  • How to debug & troubleshoot in Postman
  • Logging feature to debug automation scripts
    • console.log | console.debug | console.info | console.warn | console.error
  • Postman APIs integration with CI/CD (Jenkins)
  • Using Postman to Create a Reusable API Framework
  • Postman Tool hands on assignments against a REST & SOAP Web-Services/APIs
  • Building Test Plan & Test Cases for an API project
  • API objective/subjective test assessment

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API Testing Certification

SLearn certification is awarded, after successful completion of the project work which shows that trainee have learned, achieved skills and experiences from the project. All the acknowledged trainees are therefore eligible for challenging projects and better job opportunities in MNC's like TCS, IBM, Cisco, Cognizant, Wipro, Dell etc.

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