Uptime Kuma is an easy-to-use self-hosted monitoring tool.

Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.

Radically better observability stack

Mockoon is the easiest and quickest way to design and run mock REST APIs.

Bruno is a Fast and Git-Friendly Opensource API client, aimed at revolutionizing the status quo represented by Postman, Insomnia and similar tools out there.

Percy is a visual testing and monitoring tool that focuses on detecting visual changes in web applications