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Updates the metadata of a bucket. Changes to the bucket are readable immediately after writing, but configuration changes may take time to propagate.
Caution: You should generally use the PATCH method, which changes only metadata you define in the request. The UPDATE method might change certain metadata for the bucket even if that metadata is not specified in the request. Required permissionsTo use this method,the authenticated user must have the storage.buckets.update
IAM permission. Additionally, to perform specific actions on a bucket, the authenticated user must have the following permissions:
storage.buckets.setIamPolicy
storage.buckets.getIamPolicy
storage.buckets.setIpFilter
storage.buckets.getIpFilter
PUT https://storage.googleapis.com/storage/v1/b/bucket
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. Optional query parameters ifMetagenerationMatch
long
Makes the return of the bucket metadata conditional on whether the bucket's current metageneration matches the given value. ifMetagenerationNotMatch
long
Makes the return of the bucket metadata conditional on whether the bucket's current metageneration does not match the given value. predefinedAcl
string
Apply a predefined set of access controls to this bucket.
Acceptable values are:
authenticatedRead
: Project team owners get OWNER
access, and allAuthenticatedUsers
get READER
access.private
: Project team owners get OWNER
access.projectPrivate
: Project team members get access according to their roles.publicRead
: Project team owners get OWNER
access, and allUsers
get READER
access.publicReadWrite
: Project team owners get OWNER
access, and allUsers
get WRITER
access.iamConfiguration.uniformBucketLevelAccess.enabled
is set to true
, requests that include this parameter fail with a 400 Bad Request
response.
predefinedDefaultObjectAcl
string
Apply a predefined set of default object access controls to this bucket.
Acceptable values are:
authenticatedRead
: Object owner gets OWNER
access, and allAuthenticatedUsers
get READER
access.bucketOwnerFullControl
: Object owner gets OWNER
access, and project team owners get OWNER
access.bucketOwnerRead
: Object owner gets OWNER
access, and project team owners get READER
access.private
: Object owner gets OWNER
access.projectPrivate
: Object owner gets OWNER
access, and project team members get access according to their roles.publicRead
: Object owner gets OWNER
access, and allUsers
get READER
access.iamConfiguration.uniformBucketLevelAccess.enabled
is set to true
, requests that include this parameter fail with a 400 Bad Request
response.
projection
string
Set of properties to return. Defaults to full
.
Acceptable values are:
full
: Include all properties.noAcl
: Omit owner
, acl
, and defaultObjectAcl
properties.In the request body, supply a bucket resource with the following properties:
Property name Value Description Notes Required Propertiesacl[]
list
Access controls on the bucket. If empty, this parameter is ignored. Can contain one or more bucketAccessControls Resources.
Note: ACLs do not apply in buckets whereiamConfiguration.uniformBucketLevelAccess.enabled
is set to true
. Requests to such buckets fail with a 400 Bad Request
response if the request contains a non-empty acl[]
property. writable Optional Properties autoclass
object
The bucket's Autoclass configuration, which, when enabled, controls the storage class of objects based on how and when the objects are accessed. For more information, see Autoclass. writable billing
object
The bucket's billing configuration, used to control the Requester Pays feature. writable cors[]
list
The bucket's CORS configuration. For more information, see Cross-Origin Resource Sharing. writable defaultEventBasedHold
boolean
Whether or not to automatically apply an eventBasedHold
to new objects added to the bucket. writable defaultObjectAcl[]
list
Default access controls to apply to new objects when no ACL is provided. This list defines an entity
and role
for one or more defaultObjectAccessControls Resources. If iamConfiguration.uniformBucketLevelAccess.enabled
is set to true
, this field is omitted in responses, and requests that specify this field fail with a 400 Bad Request
response. writable encryption
object
The bucket's encryption configuration. writable iamConfiguration
object
The bucket's IAM configuration. writable ipFilter
object
The bucket IP filtering configuration . For more information about bucket IP filtering, see Bucket IP filtering. writable labels
object
User-provided bucket labels, in key/value pairs. writable labels.(key)
string
An individual label entry. writable lifecycle
object
The bucket's lifecycle configuration. See lifecycle management for more information. writable logging
object
The bucket's logging configuration. For more information, see usage logs and storage logs. writable retentionPolicy
object
The bucket's retention policy configuration. For more information, see Bucket Lock. writable rpo
string
The recovery point objective for cross-region replication of the bucket. Applicable only for dual- and multi-region buckets. "DEFAULT"
uses default replication. "ASYNC_TURBO"
enables turbo replication, valid for dual-region buckets only. For more information, see redundancy across regions. writable softDeletePolicy
object
The bucket's soft delete policy configuration. For more information, see Soft Delete. writeable storageClass
string
The bucket's default storage class, used whenever no storageClass
is specified for a newly-created object. For available storage classes, see Storage classes. writable versioning
object
The bucket's versioning configuration. For more information, see Object Versioning. writable website
object
The bucket's website configuration, controlling how the service behaves when accessing bucket contents as a web site. See the Static Website Examples for more information. writable Response
If successful, this method returns a bucket resource in the response body.
For information about status and error codes returned by this API, see the reference page.
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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