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API Testing with RestAssured & Postman - Complete Course

Master backend API testing — the most critical skill for modern QA. Learn both Postman and RestAssured with Java.

🕑 50 Hours
🎓 Beginner to Advanced
💻 Online & Offline
💼 Placement Assistance

Course Overview

API testing is essential in today's microservices-driven world. This 50-hour course teaches you both manual API testing with Postman and automated API testing with RestAssured (Java). You'll learn REST architecture, HTTP methods, authentication, data-driven testing, schema validation, and CI/CD integration.

By the end, you'll build a complete API automation framework from scratch and be ready for API testing roles at any company.

Who should take this course: Manual testers, automation engineers, developers, and anyone wanting to master backend testing. Basic Java knowledge is helpful but not mandatory.

Detailed Course Syllabus

1 Introduction to APIs+
  • What is an API — Real-World Analogies
  • REST vs SOAP APIs
  • HTTP Methods — GET, POST, PUT, PATCH, DELETE
  • HTTP Status Codes — 1xx, 2xx, 3xx, 4xx, 5xx
  • Request Structure — URL, Headers, Body, Query Params
  • Response Structure — Status, Headers, Body
  • JSON & XML Data Formats
2 API Architecture & Protocols+
  • REST Architecture Principles
  • Resource-Based URLs & Endpoints
  • Headers — Content-Type, Accept, Authorization
  • Query Parameters vs Path Parameters
  • Request Body — JSON & Form Data
  • Idempotency & Safe Methods
3 Postman Fundamentals+
  • Postman Installation & Interface Tour
  • Creating GET, POST, PUT, DELETE Requests
  • Collections — Organizing API Requests
  • Environments & Variables
  • Viewing Responses — Body, Headers, Status
  • Saving & Sharing Requests
  • Postman Console for Debugging
4 Postman Advanced Features+
  • Pre-Request Scripts — Setting Dynamic Values
  • Test Scripts — Assertions with pm.test()
  • Environment & Global Variables
  • Collection Runner — Batch Execution
  • Data-Driven Testing with CSV/JSON Files
  • Chaining Requests — Using Variables Across Requests
  • Mock Servers in Postman
5 Newman CLI+
  • Installing Newman via npm
  • Running Collections from Command Line
  • HTML & JUnit Report Generation
  • Environment Files with Newman
  • CI/CD Integration with Newman
6 Introduction to RestAssured+
  • What is RestAssured & Why Use It
  • Maven Project Setup with RestAssured Dependencies
  • Given-When-Then Syntax (BDD Style)
  • First API Test — GET Request
  • Response Validation — Status Code, Body, Headers
  • Logging — Request & Response Logs
7 HTTP Methods with RestAssured+
  • GET Request — Query Params, Path Params
  • POST Request — JSON Body, Object Serialization
  • PUT Request — Full Resource Update
  • PATCH Request — Partial Update
  • DELETE Request
  • Handling Request & Response Headers
8 JSON & XML Parsing+
  • JSONPath Expressions — Extracting Values
  • XMLPath Expressions
  • Hamcrest Matchers — equalTo, hasItem, hasSize
  • Body Validation — Nested JSON, Arrays
  • Extracting Values into Variables
  • POJO Serialization/Deserialization (Gson, Jackson)
9 Authentication & Authorization+
  • Basic Authentication
  • Bearer Token Authentication
  • OAuth 2.0 — Authorization Code, Client Credentials
  • API Keys
  • Session Management & Cookies
  • JWT Token Handling
10 Request & Response Specification+
  • RequestSpecification — Reusable Request Config
  • ResponseSpecification — Reusable Validation
  • Base URI & Base Path Configuration
  • Filters & Logging
  • Custom Headers & Content-Type
11 Data-Driven API Testing+
  • TestNG DataProvider for API Tests
  • Reading Test Data from Excel
  • Reading Test Data from JSON Files
  • Parameterized API Requests
  • Dynamic Payload Generation
12 Schema Validation+
  • JSON Schema — Structure & Syntax
  • Validating Response Against JSON Schema
  • Schema Files — Defining Expected Structure
  • Contract Testing Concepts
  • Schema Validation in CI Pipeline
13 API Automation Framework+
  • Framework Architecture Design
  • Utility Classes — API Client, Config Reader, Data Reader
  • Endpoint Management — Constants & Enums
  • Request Builder Pattern
  • Response Wrapper & Custom Assertions
  • Logging & Reporting (ExtentReports)
14 CI/CD Pipeline for API Testing+
  • Jenkins Job for API Tests
  • Maven Execution in CI
  • Automated Test Reports
  • Email Notifications
  • Git Integration
15 Live API Testing Project & Interview Prep+
  • Building Complete API Framework on Real APIs
  • CRUD Operations End-to-End
  • Authentication Flow Automation
  • Negative Testing & Edge Cases
  • Report Generation & CI/CD Setup
  • Top API Testing Interview Questions
  • Resume Building & Mock Interviews

Frequently Asked Questions

Do I need coding knowledge for this course?+
Basic Java knowledge is helpful for RestAssured but not mandatory. The Postman section requires no coding. We cover enough Java during the RestAssured modules. If you've taken our Selenium course, you're well prepared.
What is the difference between Postman and RestAssured?+
Postman is a GUI tool for manual and semi-automated API testing — great for exploring APIs and quick testing. RestAssured is a Java library for building robust, automated API test frameworks. We teach both because both are needed in the industry.
What APIs will we test in the course?+
We use publicly available REST APIs for practice and then build a framework on a real-world API with CRUD operations, authentication, and complex business logic for the live project.
What is the course duration?+
50 hours total. Weekday batches (1.5-2 hours daily) or weekend batches (3-4 hours). Completion in 5-8 weeks.
Is API testing in demand?+
Absolutely! With microservices architecture, API testing is now the most critical testing skill. Almost every automation testing job posting requires API testing knowledge. It's a must-have skill.
Can I attend online?+
Yes, live online batches are available. Interactive sessions, not pre-recorded. Lifetime access to recordings.
Do you provide placement assistance?+
Yes — resume building, mock interviews, LinkedIn optimization, and referrals to hiring partners.
Will I get a certificate?+
Yes, course completion certificate from RM Infotech Pvt. Ltd. upon successful completion.
Can I learn API testing without learning Selenium first?+
Yes! API testing is independent of UI testing. Many professionals specialize in API testing alone. However, combining both skills makes you more versatile.
Do I have to pay the full fee upfront?+
We do not offer EMI or installment options for individual courses. However, you can attend a few trial classes first and pay only after you're satisfied with the training quality. This way, you can experience our teaching methodology risk-free before committing.

Master API Testing — The Most In-Demand Skill

Learn RestAssured & Postman and become essential to any QA team.

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