This API Testing for Manual Testers roadmap can help you build your skills progressively, from API fundamentals to automation.
30-Day API Testing Learning Roadmap
Here is a practical schedule for beginners.
Week 1 — API Fundamentals
Day 1: What is API?
Day 2: Client-server architecture
Day 3: HTTP and HTTPS
Day 4: HTTP methods
Day 5: Status codes
Day 6: Headers
Day 7: Query and path parameters
Week 2 — Postman Basics
Day 8: Install and explore Postman
Day 9: GET requests
Day 10: POST requests
Day 11: PUT requests
Day 12: PATCH requests
Day 13: DELETE requests
Day 14: Request body and JSON
Week 3 — Practical API Testing
Day 15: Positive testing
Day 16: Negative testing
Day 17: Boundary-value testing
Day 18: Authentication
Day 19: Authorization
Day 20: Variables and environments
Day 21: API chaining
Week 4 — Advanced Beginner Skills
Day 22: Response validation
Day 23: Test scripts
Day 24: Collection Runner
Day 25: Data-driven testing
Day 26: Newman
Day 27: API automation concepts
Day 28: Playwright API testing
Day 29: Create an API testing project
Day 30: Add the project to your resume/GitHub