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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/93727) in GitLab 15.3 [with a flag](../administration/feature_flags.md) named `authenticate_markdown_api`. Enabled by default.
FLAG:
On self-managed GitLab, by default this feature is enabled and authentication is required.
To remove the requirement to authenticate, ask an administrator to
[disable the feature flag](../administration/feature_flags.md) named `authenticate_markdown_api`.
On GitLab.com, this feature is available.
All API calls to the Markdown API must be [authenticated](index.md#authentication).