Your API’s Best Friend

Test APIs locally within a super-optimized native Mac App and speed up API integrations with the help of our AI assistant. No login required!

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What 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, Open API Specs and generating integration code.

How it works

Aspen 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 App