Add JSON schema specs for internal APIs

Everyone can contribute. Help move this issue forward while earning points, leveling up and collecting rewards.

Close this issue

We have some internal JSON APIs, that live in Rails controllers. @dbalexandre has added a JSON schema validator in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5548. We should go back and add this validation to our existing internal APIs, to ensure we don't break things in future. As we add more front-end code using Vue, this will become more important.

Edited Sep 25, 2025 by 🤖 GitLab Bot 🤖