API Testing Courses

Using OpenAPI/Swagger for Testing and Code Generation in ASP.NET Core
Pluralsight

Postman Fundamentals
Pluralsight

Introduction to WireMock
Pluralsight

API Testing a real web application via Postman
Coursera Project Network via Coursera

Automatiza pruebas API con RestAssured - Parte 1
Udemy

API Testing with Karate Framework
Coursera Project Network via Coursera

Cypress UI automation testing for absolute beginners
Coursera Project Network via Coursera

ISTQB Technical Test Analyst
YouTube

Learn Testing for Web Development
Codecademy

Quick Introduction to Postman and API Testing for Beginners
Udemy