Lukas Rosenstock is an independent API design, development and integration expert and founder at CloudObjects.

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Run massively scalable performance tests on web, mobile, and APIs

API Performance Testing Scenarios and Vocabulary

API testing is crucial for optimal system performance. To help you navigate through, this article is an introduction to API testing terminology and scenarios.

Functional API Testing with Postman, Newman and BlazeMeter

This easy guide will talk you through how to run your API Functional Tests using Postman, Newman and BlazeMeter. Start with API Functional Testing in minutes.

Getting Started with Postman

Postman is an open source tool for API functional testing. This easy guide explains how to use Postman for API testing, for beginner and advanced users

How to Generate OpenAPI Definitions From Code

Learn how and why to transform your team’s APIs into OpenAPI definition files. Get OpenAPI benefits by using these code libraries to transform your APIs.

Designing APIs with Apicurio Studio

Learn Apicurio Studio, an open source API designing tool. This guide will teach you to easily design your APIs by taking you through a step by step explanation.

Create Your First OpenAPI Definition with Swagger Editor

Learn how to write your own OpenAPI definitions in the Swagger Editor. This practical guide for using the Swagger Editor will get you writing API in no time.

5 Reasons You Should Use OpenAPI / Swagger for your APIs

API developers? Discover why you should use OpenAPI for your API designing. Learn 5 reasons for choosing OpenAPI / Swagger for your API development needs.

What’s New in Swagger / OpenAPI 3?

Swagger/OpenAPI 3 was recently released. Read this blog post to learn what’s new and how to use it. Everything you need to know about OpenAPI/Swagger is here.

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