We built a free public API lab (REST, OData, MCP, FHIR, SOAP, Socket.IO etc) with no account and no setup required. To be honest, its a playground for a free product we launch soon, that will go to GIT too; but works perfectly fine with Postman, Insomnia, Bruno and your own code. Theres a curated GIT version to install and run locally at
https://github.com/lockflare/sondahub-core. Hope you all enjoy it.