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: Salesforce Development, Visualforce, Development Environment, Application Development, UI Components, Web Components, Salesforce, Web Applications, Jest (JavaScript Testing Framework), Web Design and Development, JavaScript Frameworks, User Interface (UI), Application Programming Interface (API), Test Script Development, Restful API, Data Access, Cascading Style Sheets (CSS), Event-Driven Programming, Hypertext Markup Language (HTML)
Intermediate · Course · 3 - 6 Months

Packt
Skills you'll gain: Node.JS, Containerization, Kubernetes, Cloud-Native Computing, Distributed Computing, Load Balancing, Dataflow, Scalability, Unit Testing, Data Pipelines, Test Script Development, Test Automation, API Gateway, Server Side, Microservices, Event-Driven Programming, Javascript, Software Architecture, Web Development, Web Applications
Intermediate · Specialization · 3 - 6 Months

Scrimba
Skills you'll gain: Prompt Engineering, Responsive Web Design, Node.JS, Command-Line Interface, TypeScript, Unit Testing, SQL, HTML and CSS, Web Content Accessibility Guidelines, Typography, Cascading Style Sheets (CSS), React.js, User Interface and User Experience (UI/UX) Design, Hypertext Markup Language (HTML), JavaScript Frameworks, JSON, Generative AI, Database Design, UI Components, Web Development
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: C# (Programming Language), ASP.NET, Maintainability, Object Oriented Design, .NET Framework, JSON, Development Environment, Web Development, Application Frameworks, Restful API, Code Reusability, Microsoft Development Tools, Microsoft Visual Studio, File I/O, Web Applications, UI Components, Object Oriented Programming (OOP), Back-End Web Development, Functional Design, Application Deployment
Beginner · Specialization · 3 - 6 Months

Google Cloud
Skills you'll gain: Identity and Access Management, Google Cloud Platform, Cloud API, User Accounts, Application Programming Interface (API), Cloud Services, Role-Based Access Control (RBAC), Cloud Platforms, Cloud Storage
Beginner · Project · Less Than 2 Hours

University of California, Irvine
Skills you'll gain: Internet Of Things, Application Programming Interface (API), TCP/IP, Web Services, Electronics, Control Systems, Embedded Systems, Network Protocols, USB, General Networking, Networking Hardware, Electronic Systems, Machine Controls, Hardware Design, Digital Signal Processing, Digital Communications, Computer Hardware, Python Programming
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, Server Side, Event-Driven Programming, Javascript, Software Architecture, Web Applications, API Design, Microservices, Software Design Patterns, Dependency Analysis, Maintainability, Interoperability, Package and Software Management, Software Testing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: iOS Development, Mobile Development, Apple iOS, Apple Xcode, Swift Programming, Objective-C (Programming Language), User Interface (UI), Mobile Development Tools, Application Development, UI Components, Application Programming Interface (API), Knowledge of Apple Software, Development Environment, Integrated Development Environments, Storyboarding
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Apple iOS, Apple Xcode, iOS Development, Swift Programming, Image Analysis, OpenAI API, Artificial Intelligence and Machine Learning (AI/ML), Computer Vision, Large Language Modeling, Natural Language Processing, Machine Learning Methods, Knowledge of Apple Software, Machine Learning Software, Apple Hardware proficiency, LLM Application, Application Development, Applied Machine Learning, OpenAI, AI Integrations, Machine Learning
Intermediate · Course · 1 - 3 Months

Packt
Skills you'll gain: Deepseek, DeepSeek API, LLM Application, Model Deployment, Generative AI Agents, Prompt Engineering, AI Workflows, Tool Calling, OpenAI, AI Orchestration, Agentic Workflows, Large Language Modeling, Fine-tuning, Prompt Patterns, Legal Technology, Model Optimization, Model Training, Gemini, Deep Learning, Cloud Platforms
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Containerization, Kubernetes, Cloud-Native Computing, Node.JS, Distributed Computing, Load Balancing, Scalability, Microservices, API Gateway, Redis, Cloud Deployment, Systems Architecture, Software Architecture, Web Applications, Event-Driven Programming, Javascript, Maintainability, Performance Tuning, OS Process Management, Development Testing
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, Restful API, Server Side, Back-End Web Development, Full-Stack Web Development, JavaScript Frameworks, JSON, Web Servers, Authentications, Web Applications, API Design, Web Development, Postman API Platform, Package and Software Management, Model View Controller, Application Programming Interface (API), Web Services, Authorization (Computing), Javascript, Computer Science
Intermediate · Course · 1 - 4 Weeks