Swagger Editor, Swagger Codegen & Swagger UI
I have been using Postman with my team for developing and publishing APIs for our services, but the costs are adding up pretty quickly ($15/user/month), and still no support for SSO.
I noticed that your documentation makes use of Swagger, so I am sure it would be fairly easy to add support for the same.
Please don't forget to upvote if you think it's a good idea.
Would love to see this as a 1-click install app