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.

Skills you'll gain: Cloud Infrastructure, CI/CD, Microservices, Application Deployment, Cloud Deployment, Kubernetes, Cloud Computing Architecture, Google App Engine, Site Reliability Engineering, Restful API, Google Cloud Platform, Cloud Services, Devops Tools, Infrastructure Architecture, Continuous Deployment, Network Architecture, API Design, Cloud Applications, Hybrid Cloud Computing, Cloud Storage
★ 4.6 (81) · Advanced · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: JUnit, Unit Testing, Software Testing, Mockups, Test Case, Test Driven Development (TDD), Java
★ 3.3 (13) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: React Redux, React.js, Frontend Integration, Back-End Web Development, Front-End Web Development, UI Components, Web Applications, Application Programming Interface (API), JavaScript Frameworks, Authentications, Server Side, Responsive Web Design, Restful API, User Interface (UI), User Accounts, Secure Coding, Authorization (Computing)
★ 4.7 (12) · Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: DeepSeek API, Deepseek, User Interface (UI), LLM Application, AI Workflows, AI Integrations, Human Computer Interaction, Agentic Workflows, Retrieval-Augmented Generation, AI Product Strategy, Embeddings, Application Deployment, Case Studies
★ 3.9 (8) · Intermediate · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Model Deployment, Tensorflow, Keras (Neural Network Library), Google Cloud Platform, Model Optimization, Model Training, Cloud Deployment, Data Pipelines, Deep Learning, Data Preprocessing, Feature Engineering, Predictive Modeling, Model Evaluation, Data Import/Export, Artificial Neural Networks, Data Manipulation
★ 4.5 (137) · Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: JUnit, File I/O, Unit Testing, Java Programming, Debugging, Java, Maintainability, Software Development, Secure Coding, Software Testing, Authentications, Data Import/Export, Cryptography, Eclipse (Software), Integrated Development Environments, Encryption, Data Structures
★ 4.9 (12) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Lean Six Sigma, Lean Methodologies, Statistical Hypothesis Testing, Six Sigma Methodology, Lean Manufacturing, Correlation Analysis, Kaizen Methodology, Process Improvement, Process Improvement and Optimization, Quality Improvement, Sampling (Statistics), Milestones (Project Management), Project Management, Data Literacy, Statistical Methods, Statistical Modeling, Regression Analysis, Project Scoping, Process Analysis, Goal Setting
★ 5 (47) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: User Research, Usability Testing, Design Research, Prototyping, Design Thinking, Ideation, Usability, Internet Of Things, Solution Design, User Experience Design, User Centered Design, Human Centered Design, User Experience
★ 4.3 (7) · Beginner · Course · 1 - 4 Weeks

University of Pittsburgh
Skills you'll gain: Apache Hadoop, Cloud Computing, Apache Spark, Web Services, Cloud Services, Cloud Computing Architecture, PySpark, Cloud Infrastructure, Cloud Development, Cloud Applications, Cloud Platforms, Data Pipelines, Distributed Computing, Data Processing, Cloud Storage, Docker (Software), Virtualization, Containerization, Restful API, Data Architecture
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Data Access, Relational Databases, Object Oriented Programming (OOP), JUnit, Data Integrity, SQL, Java, Java Programming, Databases
★ 4.6 (39) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Kubernetes, Application Deployment, API Gateway, Cloud-Native Computing, Containerization, Network Troubleshooting, Data Storage, Network Administration, Infrastructure Security, Role-Based Access Control (RBAC), Software-Defined Networking, YAML, DevOps, Security Controls, Linux Administration, Data Storage Technologies, General Networking, Problem Management, Test Tools, Scenario Testing
★ 4.7 (15) · Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Google Gemini, Generative AI Agents, OpenAI API, Responsible AI, Content Creation, Large Language Modeling, Hugging Face
★ 4.6 (16) · Beginner · Course · 1 - 3 Months