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

1. Preview the first module of many 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 API, or unlock full course access after the preview or trial, you can upgrade or apply for financial aid.‎

Learning about APIs can be approached through various methods. Start by exploring online courses that cover the basics and gradually progress to more advanced topics. Hands-on practice is essential, so consider building small projects that utilize APIs to reinforce your learning. Engaging with community forums and developer groups can also provide valuable insights and support. Additionally, reading documentation and experimenting with different APIs will deepen your understanding and skills.‎

API courses typically cover a range of topics, including API design principles, RESTful services, authentication methods, and data formats like JSON and XML. You'll also learn about API testing, versioning, and documentation practices. Advanced courses may explore into specific technologies, such as GraphQL or API management platforms like Apigee. Practical projects are often included to help you apply what you've learned in real-world scenarios.‎

For training and upskilling employees in API technologies, consider courses like the Managing Google Cloud's Apigee API Platform for Hybrid Cloud Specialization which focuses on enterprise-level API management. The REST Assured Java API Testing: Basics to Frameworks Specialization is also beneficial for teams looking to enhance their testing capabilities. These programs provide structured learning paths that can help employees gain the necessary skills to effectively work with APIs.‎