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Creates a new ACL entry on the specified object.
Important: This method fails with a400 Bad Request response for buckets with uniform bucket-level access enabled. Use storage.buckets.getIamPolicy and storage.buckets.setIamPolicy to control access instead. Required permissions
The authenticated user must have one of the following permissions to use this method:
storage.objects.setIamPolicy IAM permission for the bucket containing the objectOWNER ACL permission for the objectPOST https://storage.googleapis.com/storage/v1/b/bucket/o/object/acl
In addition to standard query parameters, the following query parameters apply to this method.
To see an example of how to include query parameters in a request, see the JSON API Overview page.
Parameters Parameter name Value Description Path parametersbucket string Name of a bucket. object string Name of the object. For information about how to URL encode object names to be path safe, see Encoding URI path parts. Optional query parameters generation long If present, selects a specific revision of this object (as opposed to the latest version, the default). Request body
In the request body, supply an ObjectAccessControls resource with the following properties:
Property name Value Description Notes Required Propertiesentity string The entity holding the permission, in one of the following forms:
user-emailgroup-groupIdgroup-emaildomain-domainproject-team-projectIdallUsersallAuthenticatedUsersliz@example.com would be user-liz@example.com.example@googlegroups.com would be group-example@googlegroups.com.example.com, the entity would be domain-example.com.role string The access permission for the entity.
Acceptable values are:
OWNER"READER"If successful, this method returns an ObjectAccessControls resource in the response body.
Try it!Use the APIs Explorer below to call this method on live data and see the response.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-07 UTC.
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