API courses can help you learn how to design, build, and test application programming interfaces, as well as understand RESTful services and authentication methods. You can build skills in data exchange formats like JSON and XML, error handling, and API documentation practices. Many courses introduce tools such as Postman for testing APIs, Swagger for documentation, and various programming languages like Python or JavaScript to implement API calls, allowing you to effectively integrate and manage data across different systems.

KodeKloud
Skills you'll gain: OpenAI, Prompt Engineering, OpenAI API, Responsible AI, Token Optimization, Multimodal Prompts, AI literacy, Data Ethics, Large Language Modeling, Artificial Intelligence, Generative AI, LLM Application, Embeddings, Image Analysis, Model Training, Fine-tuning, Computer Vision, Application Programming Interface (API), Emerging Technologies
Beginner · Course · 1 - 3 Months

Skills you'll gain: OpenAI API, SQL, ChatGPT, Prompt Engineering, OpenAI, Pandas (Python Package), Query Languages, Natural Language Processing, Generative AI, Data Import/Export, Data Manipulation, Databases, Data Wrangling, Python Programming, Large Language Modeling, Machine Learning, Software Engineering
★ 4.4 (7) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: JUnit, Apache Maven, Unit Testing, Spring Framework, Spring Boot, Restful API, API Testing, Software Testing, Test Case, Application Programming Interface (API), Gradle, Build Tools, Software Development Tools, Integration Testing, Application Frameworks, Authentications
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Retrieval-Augmented Generation, OpenAI API, OpenAI, LLM Application, Dashboard Creation, Large Language Modeling, AI Integrations, Model Deployment, Back-End Web Development, Restful API, Web Development, Web Applications, Interactive Data Visualization, UI Components
★ 4.3 (14) · Intermediate · Guided Project · Less Than 2 Hours

LearnKartS
Skills you'll gain: Model Context Protocol, Agentic systems, Vector Databases, Retrieval-Augmented Generation, Prompt Engineering, Tool Calling, Google Gemini, Agentic Workflows, AI Workflows, Generative AI Agents, AI Orchestration, Server Side, Node.JS, MongoDB, Embeddings, Large Language Modeling, Natural Language Processing, Web Development, Machine Learning, Javascript
Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Prompt Engineering, Anthropic Claude, Experience Design, Generative AI, LLM Application, User Interface and User Experience (UI/UX) Design, Application Programming Interface (API), Artificial Intelligence, Artificial Intelligence and Machine Learning (AI/ML), AI Integrations, Application Development, Authentications, Context Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Context Engineering, Agentic Workflows, AI Orchestration, Tool Calling, Generative AI, Gemini, Artificial Intelligence, Google Gemini, Retrieval-Augmented Generation, Model Optimization, Embeddings, Workflow Management, Python Programming, Data Validation
★ 3.7 (9) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Frontend Integration, React.js, Full-Stack Web Development, JavaScript Frameworks, Restful API, Front-End Web Development, Back-End Web Development, Spring Boot, Web Applications, User Interface (UI), User Interface (UI) Design, Data Persistence
★ 4.8 (16) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Software Quality (SQA/SQC), Test Automation
★ 4.6 (20) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Model View Controller, ASP.NET, OAuth, API Design, Web Development, Application Programming Interface (API), .NET Framework, Web Services, Authentications, Unit Testing, Back-End Web Development, C# (Programming Language), Web Applications, Object-Relational Mapping, Application Frameworks, API Testing, Authorization (Computing), Cloud Computing, Computer Programming
★ 4.7 (38) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Responsive Web Design, Restful API, User Interface (UI) Design, Application Programming Interface (API), Web Development Tools, User Interface (UI), Web Design and Development, Database Design, HTML and CSS, User Interface and User Experience (UI/UX) Design, API Gateway, API Design, Front-End Web Development, Web Design, MongoDB, Cascading Style Sheets (CSS), Database Theory, Database Management, OAuth, Software Documentation
★ 4.9 (10) · Intermediate · Specialization · 1 - 3 Months

Board Infinity
Skills you'll gain: Layout Design, Target Audience, Design, Ethical Standards And Conduct, Professional Networking, Collaborative Software, Driving engagement, Content Management Systems, Portfolio Management
★ 4.1 (16) · Beginner · Course · 1 - 4 Weeks