I have a personal project called MindAPI - https://github.com/dsopas/MindAPI - which was created because I love mindmaps and API security.
With that in mind I decided to not only create a shared mindmap but an online version - https://dsopas.github.io/MindAPI/play/.
Its open for contributions from everyone.
Feel free also to give me your feedback.
BTW, all contributions to the project get an exclusive sticker