Skip to content

Upload a release asset

POST
/repos/{owner}/{repo}/releases/{release_id}/assets

This endpoint makes use of a Hypermedia relation to determine which URL to access. The endpoint you call to upload release assets is specific to your release. Use the upload_url returned in the response of the Create a release endpoint to upload a release asset.

You need to use an HTTP client which supports SNI to make calls to this endpoint.

Most libraries will set the required Content-Length header automatically. Use the required Content-Type header to provide the media type of the asset. For a list of media types, see Media Types. For example:

application/zip

GitHub expects the asset data in its raw binary form, rather than JSON. You will send the raw binary content of the asset as the request body. Everything else about the endpoint is the same as the rest of the API. For example, you’ll still need to pass your authentication to be able to upload an asset.

When an upstream failure occurs, you will receive a 502 Bad Gateway status. This may leave an empty asset with a state of starter. It can be safely deleted.

Notes:

  • GitHub renames asset filenames that have special characters, non-alphanumeric characters, and leading or trailing periods. The “List release assets” endpoint lists the renamed filenames. For more information and help, contact GitHub Support.
  • To find the release_id query the GET /repos/{owner}/{repo}/releases/latest endpoint.
  • If you upload an asset with the same filename as another uploaded asset, you’ll receive an error and must delete the old file before you can re-upload the new asset.

API method documentation

owner
required
string

The account owner of the repository. The name is not case sensitive.

repo
required
string

The name of the repository without the .git extension. The name is not case sensitive.

release_id
required
integer

The unique identifier of the release.

name
required
string
label
string
Media type application/octet-stream

The raw file data

string format: binary
Examples
Example default
@example.zip

Response for successful upload

Media type application/json
Release Asset

Data related to a release.

object
url
required
string format: uri
browser_download_url
required
string format: uri
id
required
integer
node_id
required
string
name
required

The file name of the asset.

string
label
required
string
nullable
state
required

State of the release asset.

string
Allowed values: uploaded open
content_type
required
string
size
required
integer
digest
required
string
nullable
download_count
required
integer
created_at
required
string format: date-time
updated_at
required
string format: date-time
uploader
required
Simple User

A GitHub user.

object
name
string
nullable
email
string
nullable
login
required
string
id
required
integer format: int64
node_id
required
string
avatar_url
required
string format: uri
gravatar_id
required
string
nullable
url
required
string format: uri
html_url
required
string format: uri
followers_url
required
string format: uri
following_url
required
string
gists_url
required
string
starred_url
required
string
subscriptions_url
required
string format: uri
organizations_url
required
string format: uri
repos_url
required
string format: uri
events_url
required
string
received_events_url
required
string format: uri
type
required
string
site_admin
required
boolean
starred_at
string
user_view_type
string
Examples
Example response-for-successful-upload
{
"url": "https://api.github.com/repos/octocat/Hello-World/releases/assets/1",
"browser_download_url": "https://github.com/octocat/Hello-World/releases/download/v1.0.0/example.zip",
"id": 1,
"node_id": "MDEyOlJlbGVhc2VBc3NldDE=",
"name": "example.zip",
"label": "short description",
"state": "uploaded",
"content_type": "application/zip",
"size": 1024,
"digest": "sha256:2151b604e3429bff440b9fbc03eb3617bc2603cda96c95b9bb05277f9ddba255",
"download_count": 42,
"created_at": "2013-02-27T19:35:32Z",
"updated_at": "2013-02-27T19:35:32Z",
"uploader": {
"login": "octocat",
"id": 1,
"node_id": "MDQ6VXNlcjE=",
"avatar_url": "https://github.com/images/error/octocat_happy.gif",
"gravatar_id": "",
"url": "https://api.github.com/users/octocat",
"html_url": "https://github.com/octocat",
"followers_url": "https://api.github.com/users/octocat/followers",
"following_url": "https://api.github.com/users/octocat/following{/other_user}",
"gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
"starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
"organizations_url": "https://api.github.com/users/octocat/orgs",
"repos_url": "https://api.github.com/users/octocat/repos",
"events_url": "https://api.github.com/users/octocat/events{/privacy}",
"received_events_url": "https://api.github.com/users/octocat/received_events",
"type": "User",
"site_admin": false
}
}

Response if you upload an asset with the same filename as another uploaded asset