So maybe Gitea is what you are looking for. It can be self hosted and they have an API. Links to the documentation from here https://docs.gitea.io/en-us/api-us

So maybe Gitea is what you are looking for. It can be self hosted and they have an API. Links to the documentation from here https://docs.gitea.io/en-us/api-usage/ https://docs.gitea.io/en-us/api-usage/ It's not headless but maybe there is a way to shut down the HTML interface. But probably the same could be said of GitLab.