API testing courses can help you learn how to validate API functionality, performance, security, and reliability. You can build skills in writing test cases, automating tests, and analyzing API responses to ensure they meet specifications. Many courses introduce tools like Postman, SoapUI, and JMeter, that support executing tests and monitoring API behavior. You'll also explore methods for integrating testing into the development process, enhancing collaboration between teams, and ensuring seamless application performance.

Board Infinity
Skills you'll gain: Application Programming Interface (API), API Gateway, GraphQL, API Design, Restful API, OAuth, Software Documentation, Authentications, Debugging, Real Time Data, Authorization (Computing)
★ 4.9 (7) · Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: JSON, Restful API, API Design, Web Applications, Application Programming Interface (API), Responsive Web Design, Cascading Style Sheets (CSS), Dashboard Creation, Event-Driven Programming, HTML and CSS, Javascript, Wireframing, Web Servers, Web Development, Real Time Data, Game Design, Hypertext Markup Language (HTML), Servers, Software Development
★ 4.9 (22) · Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: API Testing, Open Web Application Security Project (OWASP), Postman API Platform, Application Programming Interface (API), Security Testing, Penetration Testing, AI Integrations, Restful API, Continuous Monitoring, Application Security, Vulnerability Assessments, Exploit development, Vulnerability Scanning, Test Tools, Software Documentation, Exploitation techniques, Authentications, JSON, Security Management, Docker (Software)
Intermediate · Course · 1 - 3 Months

Skills you'll gain: API Gateway, OAuth, Restful API, API Design, Application Programming Interface (API), Cloud API, Application Deployment, Application Security, Continuous Deployment, AI Integrations, Cloud Deployment, LLM Application, Authentications, Data Loss Prevention, Web Services, AI Security, Data Security, Google Cloud Platform, CI/CD, AI Workflows
★ 4.7 (2.9K) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Restful API, API Design, API Testing, Spring Boot, Test Automation, JSON, Software Quality (SQA/SQC), Application Programming Interface (API), Data Modeling, System Configuration, Java Programming, Application Development, Functional Testing, Java, Application Design, Configuration Management, Project Design, Data Persistence, Functional Design, System Design and Implementation
★ 4.9 (60) · Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: API Testing, Application Programming Interface (API), Test Tools, Behavior-Driven Development, Test Automation
★ 4.4 (23) · Beginner · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Test Automation, Performance Testing, Software Testing, API Testing, Test Script Development, Security Testing, Test Tools, CI/CD, Regression Testing, Automation, Test Case
Beginner · Course · 1 - 3 Months

Skills you'll gain: Authentications, OAuth, API Testing, Restful API, Application Programming Interface (API), JSON, Test Automation, Data Validation, Extensible Markup Language (XML), Debugging
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Browser Compatibility, Performance Testing, Security Testing, Integration Testing, System Testing, API Testing, Software Testing, User Acceptance Testing (UAT), Acceptance Testing, Test Automation, Web Applications, Docker (Software), User Interface (UI), Python Programming
Beginner · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Secure Coding, API Testing, Application Programming Interface (API), Security Testing, Penetration Testing, Application Security, Restful API, Authentications, Personally Identifiable Information, Vulnerability Scanning, Distributed Denial-Of-Service (DDoS) Attacks, Vulnerability Assessments, Exploitation techniques, Data Security, Business Logic, Authorization (Computing), Scenario Testing, Security Controls, Development Environment, Cybersecurity
Intermediate · Course · 1 - 3 Months

Simplilearn
Skills you'll gain: API Testing, Performance Testing, Performance Stress Testing, Test Script Development, Application Programming Interface (API), Test Tools, Software Testing, Test Planning, Scenario Testing, System Testing, Scripting, Simulations, Scalability, Software Installation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: GitHub, Version Control, API Testing, Authentications, Test Tools, Eclipse (Software), Extensible Markup Language (XML)
Intermediate · Course · 3 - 6 Months