GetPublicAccessBlock - Amazon Simple Storage Service Archived: 2026-04-06 00:46:21 UTC Note This operation is not supported for directory buckets. Retrieves the PublicAccessBlock configuration for an Amazon S3 bucket. This operation returns the bucket-level configuration only. To understand the effective public access behavior, you must also consider account-level settings (which may inherit from organization-level policies). To use this operation, you must have the s3:GetBucketPublicAccessBlock permission. For more information about Amazon S3 permissions, see Specifying Permissions in a Policy. Important When Amazon S3 evaluates the PublicAccessBlock configuration for a bucket or an object, it checks the PublicAccessBlock configuration for both the bucket (or the bucket that contains the object) and the bucket owner's account. Account-level settings automatically inherit from organization-level policies when present. If the PublicAccessBlock settings are different between the bucket and the account, Amazon S3 uses the most restrictive combination of the bucket-level and account-level settings. For more information about when Amazon S3 considers a bucket or an object public, see The Meaning of "Public". The following operations are related to GetPublicAccessBlock : Using Amazon S3 Block Public Access PutPublicAccessBlock GetPublicAccessBlock DeletePublicAccessBlock Important You must URL encode any signed header values that contain spaces. For example, if your header value is my file.txt , containing two spaces after my , you must URL encode this value to my%20%20file.txt . Request Syntax GET /?publicAccessBlock HTTP/1.1 Host: Bucket .s3.amazonaws.com https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html Page 1 of 5 x-amz-expected-bucket-owner: ExpectedBucketOwner URI Request Parameters The request uses the following URI parameters. Bucket The name of the Amazon S3 bucket whose PublicAccessBlock configuration you want to retrieve. Required: Yes x-amz-expected-bucket-owner The account ID of the expected bucket owner. If the account ID that you provide does not match the actual owner of the bucket, the request fails with the HTTP status code 403 Forbidden (access denied). Request Body The request does not have a request body. Response Syntax HTTP/1.1 200 boolean boolean boolean boolean Response Elements If the action is successful, the service sends back an HTTP 200 response. The following data is returned in XML format by the service. PublicAccessBlockConfiguration Root level tag for the PublicAccessBlockConfiguration parameters. Required: Yes BlockPublicAcls https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html Page 2 of 5 Specifies whether Amazon S3 should block public access control lists (ACLs) for this bucket and objects in this bucket. Setting this element to TRUE causes the following behavior: PUT Bucket ACL and PUT Object ACL calls fail if the specified ACL is public. PUT Object calls fail if the request includes a public ACL. PUT Bucket calls fail if the request includes a public ACL. Enabling this setting doesn't affect existing policies or ACLs. Type: Boolean BlockPublicPolicy Specifies whether Amazon S3 should block public bucket policies for this bucket. Setting this element to TRUE causes Amazon S3 to reject calls to PUT Bucket policy if the specified bucket policy allows public access. Enabling this setting doesn't affect existing bucket policies. Type: Boolean IgnorePublicAcls Specifies whether Amazon S3 should ignore public ACLs for this bucket and objects in this bucket. Setting this element to TRUE causes Amazon S3 to ignore all public ACLs on this bucket and objects in this bucket. Enabling this setting doesn't affect the persistence of any existing ACLs and doesn't prevent new public ACLs from being set. Type: Boolean RestrictPublicBuckets Specifies whether Amazon S3 should restrict public bucket policies for this bucket. Setting this element to TRUE restricts access to this bucket to only AWS service principals and authorized users within this account if the bucket has a public policy. Enabling this setting doesn't affect previously stored bucket policies, except that public and cross-account access within any public bucket policy, including non-public delegation to specific accounts, is blocked. Type: Boolean Examples Sample Request https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html Page 3 of 5 The following request gets a bucket PublicAccessBlock configuration. GET /?publicAccessBlock HTTP/1.1 Host: .s3..amazonaws.com x-amz-date: Authorization: Sample Response This example illustrates one usage of GetPublicAccessBlock. HTTP/1.1 200 OK x-amz-id-2: ITnGT1y4REXAMPLEPi4hklTXouTf0hccUjo0iCPEXAMPLEutBj3M7fPGlWO2SEWp x-amz-request-id: 51991EXAMPLE5321 Date: Thu, 15 Nov 2016 00:17:22 GMT Server: AmazonS3 Content-Length: 0 TRUE FALSE FALSE FALSE See Also For more information about using this API in one of the language-specific AWS SDKs, see the following: AWS Command Line Interface V2 AWS SDK for .NET V4 AWS SDK for C++ AWS SDK for Go v2 AWS SDK for Java V2 AWS SDK for JavaScript V3 AWS SDK for Kotlin https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html Page 4 of 5 AWS SDK for PHP V3 AWS SDK for Python AWS SDK for Ruby V3 Source: https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetPublicAccessBlock.html Page 5 of 5