2025-10-20•6 min read•Testing
Mastering API Testing: A Complete Guide for Manual Testers
Comprehensive guide to API testing for manual testers. Learn about REST APIs, testing tools, and best practices.
API testing is becoming an essential skill for manual testers. This guide will help you understand and master API testing fundamentals.
Why API Testing Matters
- Increased adoption of microservices
- Early bug detection
- Faster test execution
- Better test coverage
Key Concepts to Master
- HTTP Methods (GET, POST, PUT, DELETE)
- Status Codes
- Request/Response formats
- Authentication methods
- JSON and XML
Popular Tools
- Postman
- REST Assured
- SoapUI
- JMeter
Best Practices
- Test for positive and negative scenarios
- Validate response schemas
- Check error handling
- Test security aspects
- Maintain test data independence
Start with simple APIs and gradually move to more complex scenarios. Practice is key!