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: Information Architecture, UI/UX Research, Persona (User Experience), Design Research, User Interface and User Experience (UI/UX) Design, Persona Development, Usability, Qualitative Research, Usability Testing, Surveys, Human Centered Design, Technical Communication, Tree Maps, Product Strategy, Interviewing Skills
★ 4.9 (20) · Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Angular, Application Deployment, JavaScript Frameworks, Software Testing, Test Tools, Web Development Tools, Unit Testing, Application Performance Management, CI/CD, Continuous Integration, Web Applications, TypeScript, Ajax, Application Lifecycle Management, Secure Coding, Web Development, Code Coverage, Software Architecture, Command-Line Interface, Version Control
★ 4.2 (17) · Intermediate · Specialization · 1 - 3 Months

LearnKartS
Skills you'll gain: Google Analytics, Email Marketing, Google Ads, WordPress, LinkedIn, Content Creation, Content Marketing, Social Media, Social Media Marketing, Facebook, Search Engine Marketing, Social Media Content, Web Analytics and SEO, Advertising Campaigns, Email Automation, Social Media Campaigns, Analytics, Keyword Research, ChatGPT, Bidding
★ 4.4 (20) · Beginner · Specialization · 3 - 6 Months

Universidad de los Andes
Skills you'll gain: Penetration Testing, Threat Detection, Vulnerability Assessments, Cybersecurity, Vulnerability Management, Exploitation techniques, Risk Management Framework, Cyber Attacks, Cyber Threat Intelligence, Cyber Risk, Human Factors (Security), Application Servers, Web Servers
★ 4.6 (126) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Linux Administration, Bash (Scripting Language), Network Monitoring, Cyber Security Assessment, Scripting Languages, System Configuration, Digital Forensics, Virtual Machines
★ 4.7 (55) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: LangGraph, Generative AI Agents, AI Orchestration, LangChain, Agentic systems, AI Workflows, LLM Application, Agentic Workflows, OpenAI API, OpenAI, Large Language Modeling, Tool Calling, Retrieval-Augmented Generation, Artificial Intelligence, AI Integrations, Generative AI, Development Environment, Microsoft Azure, AI literacy, Microsoft Development Tools
★ 4.5 (158) · Intermediate · Specialization · 3 - 6 Months

American Psychological Association
Skills you'll gain: Data Visualization, Descriptive Statistics, Plot (Graphics), Data Literacy, Graphing, Statistical Hypothesis Testing, Probability & Statistics, Statistical Inference, Quantitative Research, Statistics, Statistical Analysis, Sample Size Determination, Data Analysis, Sampling (Statistics), Exploratory Data Analysis, Scatter Plots, Correlation Analysis, Psychology, Research Design, Scientific Methods
★ 4.6 (66) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Responsible AI, Microsoft Azure, Data Ethics, Natural Language Processing, Image Analysis, Generative AI, Artificial Intelligence, Cloud Solutions, Large Language Modeling, AI Security, Computer Vision, OpenAI, OpenAI API, LLM Application, AI Integrations, Model Deployment, Key Management, Python Programming, Model Evaluation
★ 3.4 (26) · Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Model View Controller, Spring Framework, Restful API, Spring Boot, Web Services, Frontend Integration, JSON, YAML, Web Applications, Configuration Management, Angular, Java Programming, Software Architecture, Extensible Markup Language (XML)
★ 4.1 (224) · Intermediate · Course · 1 - 4 Weeks

Amazon Web Services
Skills you'll gain: AWS CloudFormation, Serverless Computing, Infrastructure as Code (IaC), Amazon Web Services, Application Programming Interface (API), Cloud Infrastructure, Event-Driven Programming, Cloud Deployment, Cloud Management, Authentications, Amazon S3, Application Deployment, Automation, Amazon DynamoDB, Scalability, Authorization (Computing)
★ 4.9 (21) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Cryptography, Network Security, Virtual Networking, Software-Defined Networking, Network Infrastructure, Network Architecture, Encryption, Network Performance Management, Virtualization, Program Development, Hardware Architecture, Open Source Technology, Performance Tuning, Unit Testing
★ 4.6 (137) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: ABAP RESTful Programming Model (RAP), SAP S/4HANA, Business Logic, SAP Applications, Unit Testing, Restful API, Application Deployment, Behavior-Driven Development, Full-Stack Web Development, Test Script Development, Application Development, Development Testing, Web Applications, Enterprise Application Management, Application Frameworks, Software Architecture, Enterprise Architecture, UI Components, Data Modeling, Database Development
★ 3 (10) · Advanced · Course · 1 - 4 Weeks