APId is described as 'Don’t just check for 200’s, model complex customer flows and monitor their realtime performance from around the world. Get notified the instant something goes wrong' and is a Uptime Monitor service in the development category. There are more than 50 alternatives to APId for a variety of platforms, including Web-based, Windows, Mac, Linux and SaaS apps. The best APId alternative is Postman, which is free. Other great apps like APId are Uptime Kuma, Insomnia REST Client, Hoppscotch and HTTP Toolkit.
APITree is a free cloud-based API tool to create, manage and share OpenAPI specifications. It converts your OpenApi v2 / v3 specification into a beautiful technical API documentation. Public API documentation is hosted for free.
AppDoctor can help you support/monitor the software you make by providing API automated testing, request proxy, and status page automation.
