Gemini 2.5 Pro (preview) https://gemini.google.com/
Prompt https://github.com/paraskakis/apidesign/blob/main/Gemini2Prompt.md
Scalar Editor https://editor.scalar.com/
Rate My OpenAPI https://ratemyopenapi.com/
OpenAPI Doctor https://pb33f.io/doctor
Mockbin https://mockbin.io/
HTTPie https://httpie.io/app