Question: Is there a free API testing tool that doesn't require login or data storage?

If you're looking for a free API testing tool that doesn't require login or data storage, Aspen is a great option. It's a user-friendly tool that runs on macOS and supports REST APIs. Aspen ensures data security by handling everything locally, with no data storage or login needed. It includes an AI assistant called Alfred, which can generate data models, Open API Specs, and integration code, making API testing and integration faster and more efficient.

Another promising tool is Conektto. Although it offers both free and paid plans, its free Community Edition includes unlimited free format API design, 4 aggregate APIs, 4 API test projects, 6 months data retention, and unlimited republishes per project. Conektto automates API integrations and testing with AI-powered tools, making API development more efficient and streamlined for product managers, architects, developers, and testers.

For those who need a comprehensive API design and testing platform, ReAPI might be ideal. It offers a no-code test case designer, serverless cloud runner, and detailed test reports. ReAPI also automates API documentation, ensuring high-quality and visually appealing results. The platform supports internal and external collaboration, making it a good choice for teams working on API development and testing.

Lastly, Katalon is an end-to-end software quality management platform that includes a free plan, offering features like no-code test recording, drag-and-drop test objects, and AI-powered tools for regression testing and automatic code generation. It supports testing of various types of applications and integrates with popular CI tools like Jenkins and Azure DevOps, making it a versatile tool for both API and broader application testing.