3e998f61d5
Co-authored-by: Laura Coursen <lecoursen@github.com> Co-authored-by: mchammer01 <42146119+mchammer01@users.noreply.github.com>
30 lines
1.2 KiB
Markdown
30 lines
1.2 KiB
Markdown
---
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title: API previews
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intro: You can use API previews to try out new features and provide feedback before these features become official.
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redirect_from:
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- /v3/previews
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versions:
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ghes: <3.4
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topics:
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- API
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---
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API previews let you try out new APIs and changes to existing API methods before they become part of the official GitHub API.
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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](https://developer.github.com/changes/) without advance notice.
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To access an API preview, you'll need to provide a custom [media type](/rest/overview/media-types) in the `Accept` header for your requests. Feature documentation for each preview specifies which custom media type to provide.
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{% ifversion ghes < 3.4 %}
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## Content attachments
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You can now provide more information in GitHub for URLs that link to registered domains by using the {% data variables.product.prodname_unfurls %} API. See "[Using content attachments](/apps/using-content-attachments/)" for more details.
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**Custom media types:** `corsair-preview`
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**Announced:** [2018-12-10](https://developer.github.com/changes/2018-12-10-content-attachments-api/)
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{% endif %}
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