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.

Skills you'll gain: Continuous Delivery, Continuous Integration, Web Services, Application Programming Interface (API), Test Tools, Software Testing, Service Oriented Architecture, Test Execution Engine
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Postman API Platform, API Design, Application Programming Interface (API), .NET Framework, API Testing, Authentications, Object-Relational Mapping, Development Environment, Microsoft Development Tools, Microsoft Visual Studio, Web Development Tools, Application Frameworks, Authorization (Computing), Endpoint Security, Software Design Patterns, Data Mapping, Identity and Access Management, Data Validation
Intermediate · Course · 1 - 3 Months

Skills you'll gain: CI/CD, Verification And Validation, Software Testing, Restful API, Development Testing, Code Reusability
★ 4.9 (8) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Prompt Engineering, OpenAI API, ChatGPT, Token Optimization, Application Programming Interface (API), API Testing, AI Integrations, Authentications, Context Engineering, Large Language Modeling, Key Management, Model Optimization, Performance Tuning
★ 4.1 (8) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Application Programming Interface (API), Test Execution Engine, Interactive Data Visualization, Web Applications, Debugging
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: OpenAI API, Fine-tuning, Prompt Engineering, OpenAI, Large Language Modeling, ChatGPT, Multimodal Prompts, Application Performance Management, Generative Model Architectures, Generative AI, LLM Application, Image Analysis, Photo Editing, Token Optimization, Application Programming Interface (API), Animations, Tool Calling, File Management, Python Programming, Computer Science
★ 3.9 (36) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Back-End Web Development, Server Side, Full-Stack Web Development, Middleware, Authentications, API Design, Application Programming Interface (API), User Accounts, Databases, JavaScript Frameworks, GitHub, Development Environment, Data Validation
★ 4.6 (39) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: API Testing, JSON, Test Automation, Test Script Development, Application Programming Interface (API), Restful API, Software Testing, Test Tools, Integration Testing, Functional Testing
★ 4.6 (309) · Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: API Gateway, Kubernetes, Cloud API, Google Cloud Platform, Hybrid Cloud Computing, Application Programming Interface (API), API Testing, Application Deployment, Software Installation, Proxy Servers, Verification And Validation, Configuration Management, YAML
★ 4.6 (44) · Beginner · Course · 1 - 4 Weeks

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

Scrimba
Skills you'll gain: OpenAI API, OpenAI, AI Workflows, LLM Application, AI Integrations, Generative AI Agents, AI Personalization, Agentic Workflows, Application Programming Interface (API), Performance Testing, Artificial Intelligence, Context Management, Application Development
★ 4.4 (23) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, Restful API, API Design, Server Side, Application Programming Interface (API), Back-End Web Development, Microsoft Visual Studio, Web Applications, Javascript, Application Development, Integrated Development Environments
★ 4.7 (6) · Intermediate · Guided Project · Less Than 2 Hours