Aspen

New!Organize, Share, and Collaborate with New Aspen Collections 🎉AspenYour API’s Best FriendTest APIs locally within a super-optimized native Mac App and speed up API integrations with the help of our AI assistant. No login required!Download Mac AppWhat is Aspen?Aspen is a free API-testing native app for macOS. Built with ZERO trust in mind, there is no login required to run API test. It is specifically made to meet the needs of testing REST APIs, and with the help of AI, instantly help with integrations by generating data models, OpenAPI Specs and generating integration code.How it worksAspen is completely free. Simply put in the parameters you want to test and get results in less than a second. Use the AI Companion Alfred to speed up integrations and development.Download Mac AppNew!Simplify API Collaboration with Aspen CollectionsWith the new Collections feature in Aspen, you can easily organize, import, export, and share API requests to streamline teamwork and reuse. Import files from tools like Postman or export your own in just a few clicks, making API workflows faster and more collaborative than ever. Learn more about Aspen Collections in our announcement blog post.Read moreFAQIs Aspen Free?Yes. Aspen is a free API testing tool made to help out developers who work on API design and API integrations.Why would I use Aspen and not Postman or Insomnia?Aspen is a tool for API testing that offers several unique advantages compared to other tools like Postman or Insomnia:Zero Trust Policy Aspen ensures high data security by not saving any data. All operations are performed locally on your machine, which means there's no risk of your data being stored or handled externally.No Login Required You can start using Aspen immediately without the need for creating an account or logging in. This feature makes it extremely convenient to integrate Aspen into your existing development tools setup.Integrated AI Assistant Aspen comes with an AI assistant that streamlines the API testing process. This assistant helps you quickly run tests, generate integration code, create OpenAPI Specifications, and develop Data Models, all within the same interface. This integration saves time and simplifies the workflow.Focus on REST APIs Aspen is specifically designed for testing REST APIs. This focus means that the tool is optimized for these types of APIs, reducing the time and effort required to set up and conduct tests.Is Aspen owned by a company?Yes! Aspen is developed by Treblle, an API platform for the entire API Lifecycle. It has a free forever tier if you want to try it out. Out of the box you get access to our API Observability, API Analytics, API Governance, Autogenerated API Docs and A(p)I Assistant products.