Yes. You can start learning RESTful API on Coursera for free in two ways:

1. Preview the first module of many RESTful API courses at no cost. This includes video lessons, readings, graded assignments, and Coursera Coach (where available).
2. Start a 7-day free trial for Specializations or Coursera Plus. This gives you full access to all course content across eligible programs within the timeframe of your trial.

If you want to keep learning, earn a certificate in RESTful API, or unlock full course access after the preview or trial, you can upgrade or apply for financial aid.‎

To learn RESTful API development effectively, start by exploring online courses that cover the basics and gradually progress to more advanced topics. Engage in hands-on projects to apply what you've learned, as practical experience is crucial. Additionally, consider joining online communities or forums where you can ask questions and share knowledge with others. Consistent practice and real-world application will help reinforce your learning and build confidence in your skills.‎

Typical topics covered in RESTful API courses include the fundamentals of REST architecture, HTTP methods, status codes, and authentication techniques. You'll also learn about data formats like JSON and XML, how to design and document APIs, and best practices for API security. Many courses incorporate practical projects, allowing you to build and test your own APIs, which is essential for solidifying your understanding.‎

For training and upskilling employees in RESTful API development, consider courses like the RESTful Microservices Using Node.js and Express Specialization, which provides a comprehensive overview of microservices architecture. The Developing APIs with Google Cloud's Apigee API Platform Specialization is also beneficial for organizations looking to leverage cloud technologies. These courses not only enhance technical skills but also promote best practices in API development.‎