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• date: 14 January 2026
• posted by: voska89

Rest APIs With the OpenAPI Specification - Schema, Swagger UI, Swagger Editor and Design-First vs. Code-First
What you'll learn
REST basics (Representational State Transfer) & principles
Create complete specifications with all important OpenAPI objects (info, server, paths, parameters, and components)
Differences between the design-first approach and the code-first approach
Design-first approach: Planning REST APIs with the OpenAPI specification (version 3.x)
Code-first approach: Automated code generation with the OpenAPI Generator
Editors and helpful tools for interactive documentation: Swagger Editor, Swagger UI, and ReDoc
Requirements
Basic understanding of web technologies: You should know what HTTP is and how clients and servers communicate in principle.
Basic knowledge of REST: Terms such as GET, POST, PUT, and DELETE should be familiar to you.
No prior knowledge of OpenAPI required: we start from scratch.
Description
In modern software development, APIs are the connecting link between systems. However, an API is only as good as its documentation. This is where the OpenAPI Specification (OAS) comes into play.This course is a comprehensive guide to professionally planning, structuring, and preparing REST APIs in a way that is understandable to others. We start with the absolute basics of REST and HTTP and work our way up to the complex definition of schemas and the use of powerful tools such as Swagger UI and the OpenAPI Generator.It doesn't matter whether you follow the Design-First approach and write the specification first or want to document existing code. In this course, you will learn the necessary knowledge for both approaches.What you will learn:Fundamentals: Understanding HTTP methods, HTTP status codes, and data formats (JSON/YAML)Structure: Mastering the OpenAPI schema (Paths, Parameters, Components, Security, etc.)Best Practices: Knowing the difference between Design-First and Code-First and applying both approachesTooling: Using Swagger Editor, Swagger UI, and ReDoc for interactive documentationAutomation: Generating code from specifications using the OpenAPI GeneratorWho is this course suitable for?Backend developers who want to cleanly document and standardize their APIsFrontend developers who want to better understand how to read and use API definitionsSoftware architects who want to establish modern API standards in their projectsProduct Owners & Technical Writers who form an interface between technology and businessPrerequisitesNo prior experience with OpenAPI/Swagger required: We start from zero!Basic understanding of web development: You should know how client and server communicate with each otherNo specific programming knowledge required: The course focuses on the specification (YAML/JSON), not on a specific programming languageCourse content overviewIntroduction: What is OpenAPI and why do we need it?REST basics: Overview of URLs, HTTP methods, status codes, and data transferThe specification: Step-by-step structure of an API document (Info, Server, Paths, Components, etc.)Professional tools: Live use of Swagger UI, ReDoc, and code generatorsTips & tricks: Avoiding common mistakes and best practices for clean API designLegal Notice (Legal Disclaimer) This course is an independent training. It was not created by the OpenAPI Initiative, is not sponsored by it, and has no direct business relationship with the OpenAPI Initiative or the owners of the Swagger trademarks. All mentioned brand names are used solely for the purpose of describing the tools and standards covered in the course content.
Who this course is for
Backend developers who want to document and standardize their APIs professionally
Software architects who want to establish the "design-first" approach and clearly define APIs.
Front-end and mobile developers who want to learn how to read API specifications
Technical writers and product owners who need to describe technical requirements for APIs precisely
Homepage

https://www.udemy.com/course/openapi-swagger-designing-documenting-rest-apis/

   
   
   

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