API previews let you try out new APIs and changes to existing API methods before they become part of the official GitHub API.
During the preview period, we may change some features based on developer feedback. If we do make changes, we'll announce them on the developer blog without advance notice.
To access an API preview, you'll need to provide a custom media type in the Accept header for your requests. Feature documentation for each preview specifies which custom media type to provide.
Enhanced deployments
Exercise greater control over deployments with more information and finer granularity.
Custom media type: ant-man-preview
Announced: 2016-04-06
Reactions
Manage reactions for commits, issues, and comments.
Custom media type: squirrel-girl-preview
Announced: 2016-05-12
Update: 2016-06-07
Timeline
Get a list of events for an issue or pull request.
Custom media type: mockingbird-preview
Announced: 2016-05-23
Pages
Get more information about your GitHub Pages site.
Custom media type: mister-fantastic-preview
Announced: 2016-07-06
Pre-receive environments
Create, list, update, and delete environments for pre-receive hooks.
Custom media type: eye-scream-preview
Announced: 2015-07-29
Projects
Manage projects.
Custom media type: inertia-preview
Announced: 2016-09-14
Update: 2016-10-27
Commit search
Custom media type: cloak-preview
Announced: 2017-01-05
Repository topics
View a list of repository topics in calls that return repository results.
Custom media type: mercy-preview
Announced: 2017-01-31
Codes of conduct
View all codes of conduct or get which code of conduct a repository has currently.
Custom media type: scarlet-witch-preview
Nested teams
Include nested team content in team payloads.
Custom media type: hellcat-preview
Announced: 2017-09-01
Global webhooks
Enables global webhooks for organization and user event types. This API preview is only available for GitHub Enterprise Server.
Custom media type: superpro-preview
Announced: 2017-12-12
Repository transfer
Transfer a repository to an organization or user.
Custom media type: nightshade-preview
Announced: 2017-11-09
Add lock reason
You can now add a reason when you lock an issue.
Custom media type: sailor-v-preview
Announced: 2018-01-10
Team discussions
You can now use the API to manage team discussions and team discussion comments.
Custom media type: echo-preview
Announced: 2018-02-07
Require signed commits
You can now use the API to manage the setting for requiring signed commits on protected branches.
Custom media type: zzzax-preview
Announced: 2018-02-22
Require multiple approving reviews
You can now require multiple approving reviews for a pull request using the API.
Custom media type: luke-cage-preview
Announced: 2018-03-16
Retrieve hovercard information
Retrieve information from someone's hovercard.
Custom media type: hagar-preview
Announced: 2018-03-21
Check runs and check suites API
Allows a GitHub App to run external checks on a repository's code. See the Check runs and Check suites APIs for more details.
Custom media type: antiope-preview
Announced: 2018-05-07
Anonymous Git access to repositories
When a GitHub Enterprise Server instance is in private mode, site and repository administrators can enable anonymous Git access for a public repository.
Custom media type: x-ray-preview
Announced: 2018-07-12
Project card details
The REST API responses for issue events and issue timeline events now return the project_card field for project-related events.
Custom media type: starfox-preview
Announced: 2018-09-05
Deployment statuses
You can now update the environment of a deployment status and use the in_progress and queued states. When you create deployment statuses, you can now use the auto_inactive parameter to mark old production deployments as inactive.
Custom media type: flash-preview
Announced: 2018-10-16
Repository creation permissions
You can now configure whether organization members can create repositories and which types of repositories they can create. See "Update an organization" for more details.
Custom media types: surtur-preview
Announced: 2019-12-03
Content attachments
You can now provide more information in GitHub for URLs that link to registered domains by using the Content Attachments API. See "Using content attachments" for more details.
Custom media types: corsair-preview
Announced: 2018-12-10
Draft pull requests
You can use the Draft Pull Requests API and its pull request endpoints to see whether a pull request is in draft state. To learn more about draft pull requests, see "About pull requests".
Custom media types: shadow-cat-preview
Announced: 2019-02-14
Enable and disable Pages
You can use the new endpoints in the Pages API to enable or disable Pages. To learn more about Pages, see "GitHub Pages Basics".
Custom media types: switcheroo-preview
Announced: 2019-03-14
List branches or pull requests for a commit
You can use two new endpoints in the Commits API to list branches or pull requests for a commit.
Custom media types: groot-preview
Announced: 2019-04-11
Uninstall a GitHub App
Owners of GitHub Apps can now uninstall an app using the Apps API.
Custom media types: gambit-preview
Enable or disable vulnerability alerts for a repository
You can use two new endpoints in the Repos API to enable or disable vulnerability alerts.
Custom media types: dorian-preview
Announced: 2019-04-24
Update a pull request branch
You can use a new endpoint to update a pull request branch with changes from the HEAD of the upstream branch.
Custom media types: lydian-preview
Announced: 2019-05-29
Create and use repository templates
You can use a new endpoint to Create a repository using a template and Create a repository for the authenticated user that is a template repository by setting the is_template parameter to true. Get a repository to check whether it's set as a template repository using the is_template key.
Custom media types: baptiste-preview
Announced: 2019-07-05