HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
CronRocket - Manage your background jobs in the cloud
MockServer - Easy mocking of any system you integrate with via HTTP or HTTPS.
AppWrite - Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
Request inspector - Debug web hooks, http clients
SlashApi - Build REST APIs fast without having to write any code.