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API Testing

Learn API testing concepts and build practical API validation skills using real-world testing scenarios, automation tools, and structured hands-on learning.

  • Learn API testing through structured Skill Sprints

  • Validate REST APIs using real-world testing workflows

  • Work with requests, responses, authentication, and status codes

  • Apply API automation, debugging, and validation techniques

  • Gain hands-on experience with practical API testing projects

Target Audience

  • Complete beginners seeking a structured introduction to API testing

  • Students and job seekers preparing for QA and software testing roles

  • Manual testers transitioning into API and automation testing careers

  • Professionals looking to strengthen backend testing and validation skills

  • Anyone interested in learning REST API testing and automation workflows

API Testing with Postman Overview

API Testing is a practical program designed to build foundational and intermediate API validation and backend testing skills used in modern software development environments. Learners work with REST APIs, HTTP methods, authentication, request handling, response validation, automation workflows, and testing tools through guided skill sprints and real-world API testing exercises.

  • Learn API testing concepts through structured Skill Sprints

  • Work with REST APIs, requests, responses, and authentication methods

  • Apply validation, debugging, and API automation techniques

  • Build practical testing workflows using real-world API scenarios

  • Develop foundational API testing skills for QA and automation environments

Delivered using OCA’s Skill Sprint™ Method with hands-on practice, real-world exercises, and instructor-led feedback.

Prerequisites

The following basic skills are recommended to maximize learning outcomes:

  • Comfort using a computer, browser navigation, and basic typing

  • Basic understanding of software testing concepts is helpful

  • Familiarity with web applications and client-server communication is beneficial

  • Interest in QA automation and backend testing workflows

  • Willingness to practice API testing through hands-on exercises

Outcomes

By the end of this course, you will be able to:

  • Understand API testing concepts and REST API workflows

  • Work with HTTP methods, requests, responses, and status codes

  • Validate API functionality using real-world testing scenarios

  • Apply authentication, headers, and parameter handling techniques

  • Perform API validation, debugging, and response verification

  • Build reusable API testing workflows and automation scripts

  • Work with API testing tools and backend validation processes

  • Build foundational API testing skills for QA and automation roles

Job Roles & Careers

After completing the program, learners will be better prepared for positions such as:

  • API Test Engineer

  • QA Automation Engineer

  • Software Test Engineer

  • Backend QA Analyst

  • Automation Tester

  • QA Analyst

  • Software Quality Analyst

Curriculum

Learn through focused Skill Sprints built around practical application and real-world tasks.

  • Explain what APIs are and how they support modern applications

  • Understand REST architecture and RESTful services

  • Identify where API testing fits in the software testing lifecycle

  • Differentiate API testing from UI testing

  • Explain how the HTTP protocol works

  • Use GET, POST, PUT, DELETE, and PATCH methods correctly

  • Interpret request and response structures

  • Analyze status codes, headers, and payloads

  • Navigate the Postman interface confidently

  • Create and execute API requests

  • Organize requests using collections

  • Manage and reuse API requests efficiently

  • Use query parameters and path variables

  • Send headers and body data

  • Work with JSON and form-data payloads

  • Build dynamic requests for different scenarios

  • Use environments to manage configurations

  • Create and use variables (global, collection, environment)

  • Manage dynamic test data

  • Reuse variables across requests

  • Explain common API authentication methods

  • Apply API keys, basic auth, and bearer tokens

  • Understand OAuth-based authentication flows

  • Validate secured API endpoints

  • Validate response status codes and headers

  • Parse JSON responses

  • Write assertions using Postman scripts

  • Validate business logic through API responses

  • Write pre-request and test scripts

  • Execute automated test collections

  • Use Collection Runner effectively

  • Analyze automated test results

  • Use CSV and JSON files for testing

  • Parameterize API requests

  • Run data-driven test scenarios

  • Validate results across datasets

  • Design negative test cases

  • Validate error messages and responses

  • Test boundary conditions

  • Ensure API stability under invalid inputs

  • Interpret Postman test reports

  • Share collections with teams

  • Document API test cases

  • Apply best practices for reporting

  • Test CRUD APIs end-to-end

  • Apply testing techniques in real use cases

  • Identify and resolve common API issues

  • Execute real-world API testing workflows

Design and implement a complete API testing solution using request validation, authentication methods, response verification, and automation workflows.

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$1,099   

  • Instructor-Led: Live Online

  • 24 Total Hours

  • Intermediate Level

  • Real-World Projects

  • Career-Focused

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Why This Course Is in Demand

Modern applications rely heavily on APIs for communication between systems, services, and applications across cloud and web environments. API testing skills remain highly valuable for QA engineering, automation testing, and backend validation roles in modern software development environments.

Frequently Asked Questions

This course is ideal for QA professionals, testers, developers, and beginners who want to learn API testing and backend validation using Postman. It is suitable for individuals looking to expand their testing skills beyond UI testing into API and integration testing.

No prior programming experience is required. The course introduces API testing concepts and basic scripting within Postman. Familiarity with basic computer usage and web applications is recommended.

Participants learn REST API fundamentals, HTTP methods, request and response handling, authentication techniques, Postman collections, assertions, automation, and data-driven testing. The program concludes with a real-world API testing project.

This course supports roles such as API Tester, QA Engineer, Software Test Engineer, Automation Tester (API-focused), and Backend QA Engineer. It also provides a strong foundation for progressing into QA automation and advanced testing roles.

Yes. The program is designed for working professionals looking to upskill in API testing and backend validation. The structured Skill Sprint Method™ ensures efficient learning with practical, hands-on exercises.

The total duration is 24 hours, delivered through instructor-led live sessions combined with hands-on practice and assignments to ensure both conceptual understanding and practical application.

Yes. This is an instructor-led online course delivered in a live, interactive virtual classroom format, allowing participants to engage in real-time discussions and guided exercises.

The course focuses on Postman as the primary tool for API testing, along with concepts related to REST APIs, HTTP protocols, authentication methods, and basic scripting for automation.

Yes. Participants who successfully complete the course and final project will receive a Certificate of Completion from OCA.

Yes. Corporate and group training options are available and can be customized based on organizational requirements and industry use cases.

Registration can be completed through the course page on the OCA website or by contacting the admissions team for enrollment assistance and schedule details.

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