info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Feature Flag Specs API **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.5.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Feature flag user lists API **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/205409) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.10.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Feature Flags API **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.5.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Legacy Feature Flags API **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.5.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Features flags API
This API is for managing Flipper-based [feature flags used in development of GitLab](../development/feature_flags/index.md).
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Merge Trains API **(PREMIUM)**
> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/36146) in GitLab 12.9.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Packages API **(PREMIUM)**
This is the API docs of [GitLab Packages](../administration/packages/index.md).
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Pages API
Endpoints for managing [GitLab Pages](https://about.gitlab.com/stages-devops-lifecycle/pages/).
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Pages domains API
Endpoints for connecting custom domain(s) and TLS certificates in [GitLab Pages](https://about.gitlab.com/stages-devops-lifecycle/pages/).
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Releases API
> - [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/41766) in GitLab 11.7.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Release links API
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/41766) in GitLab 11.7.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# Runners API
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/2640) in GitLab 8.5
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# GitLab Composer Repository **(PREMIUM)**
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/15886) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.1.
info:To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
# GitLab Go Proxy **(PREMIUM)**
> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27376) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.1.