# S3 operations 45 of 53 listed operations are implemented. Back to [S3](/docs/services/s3/index.md). ## Summary | Category | ✅ Supported | ⚠️ Partial | ❌ Unsupported | | --- | --- | --- | --- | | Buckets | 8 | | | | CORS | 1 | 2 | | | Website | 1 | 2 | | | Objects | 11 | | 3 | | Multipart uploads | 6 | | 1 | | ACLs & policies | 3 | | 4 | | Versioning | 3 | | | | Tagging | 3 | | | | Lifecycle | 2 | 1 | | | Notifications | 2 | | | --- ## Endpoints ### Buckets | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateBucket` | ✅ Supported | Account regional namespaces via x-amz-bucket-namespace: account-regional | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateBucket.html) | | `DeleteBucket` | ✅ Supported | Bucket must be empty | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucket.html) | | `HeadBucket` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadBucket.html) | | `ListBuckets` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListBuckets.html) | | `GetBucketLocation` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketLocation.html) | | `GetBucketEncryption` | ✅ Supported | Returns default SSE-S3 config; stores AES256/KMS bucket encryption rules | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketEncryption.html) | | `PutBucketEncryption` | ✅ Supported | Stores AES256/KMS bucket encryption rules | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketEncryption.html) | | `DeleteBucketEncryption` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketEncryption.html) | ### CORS | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketCors` | ⚠️ Partial | CORS rules; rule Id is not yet preserved | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketCors.html) | | `PutBucketCors` | ⚠️ Partial | CORS rules; rule Id is not yet preserved | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketCors.html) | | `DeleteBucketCors` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketCors.html) | ### Website | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketWebsite` | ⚠️ Partial | Returns the whole configuration — IndexDocument, ErrorDocument, RedirectAllRequestsTo and RoutingRules; Overcast serves no website endpoint, so nothing is actually redirected | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketWebsite.html) | | `PutBucketWebsite` | ⚠️ Partial | Stores IndexDocument, ErrorDocument, RedirectAllRequestsTo and RoutingRules with AWS's mutual exclusion and Protocol enum enforced; HttpRedirectCode values are not validated, and Overcast serves no website endpoint | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketWebsite.html) | | `DeleteBucketWebsite` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketWebsite.html) | ### Objects | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `PutObject` | ✅ Supported | Stores body + x-amz-meta-* headers; If-None-Match: * and If-Match make the write conditional, failing 412 — or 404 when If-Match finds no current version | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutObject.html) | | `GetObject` | ✅ Supported | Returns body, ETag, metadata headers; versionId selects a specific version, and a delete-marked key answers 404 with x-amz-delete-marker | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html) | | `HeadObject` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadObject.html) | | `DeleteObject` | ✅ Supported | Idempotent — 204 for missing keys; in a versioned bucket a delete adds a delete marker, and versionId removes one version permanently | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObject.html) | | `CopyObject` | ✅ Supported | x-amz-copy-source may name a source versionId | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CopyObject.html) | | `ListObjectsV2` | ✅ Supported | prefix, delimiter, max-keys (validated, clamped to 1000), start-after, continuation-token, encoding-type=url and fetch-owner; x-amz-request-payer and x-amz-optional-object-attributes accepted but Requester Pays and RestoreStatus are not emulated | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListObjectsV2.html) | | `DeleteObjects` | ✅ Supported | Batch delete up to 1000 keys; quiet mode supported; per-entry VersionId, DeleteMarker and DeleteMarkerVersionId reported | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html) | | `ListObjects` | ✅ Supported | Marker-based pagination; supports prefix, delimiter, encoding-type=url and the same max-keys validation as ListObjectsV2 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListObjects.html) | | `GetObjectAttributes` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObjectAttributes.html) | | `PutObjectTagging` | ✅ Supported | Up to 10 tags, unique keys, key 1-128 and value 0-256 characters; the tag character set is not validated | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutObjectTagging.html) | | `GetObjectTagging` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObjectTagging.html) | | `DeleteObjectTagging` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjectTagging.html) | | `RestoreObject` | ❌ Unsupported | Glacier restore simulation | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_RestoreObject.html) | | `SelectObjectContent` | ❌ Unsupported | S3 Select (SQL queries on objects) | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_SelectObjectContent.html) | ### Multipart uploads | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateMultipartUpload` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateMultipartUpload.html) | | `UploadPart` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPart.html) | | `UploadPartCopy` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPartCopy.html) | | `CompleteMultipartUpload` | ✅ Supported | Honours the same If-None-Match: * and If-Match conditional writes as PutObject, evaluated at completion time | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html) | | `AbortMultipartUpload` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_AbortMultipartUpload.html) | | `ListMultipartUploads` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListMultipartUploads.html) | | `ListParts` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListParts.html) | ### ACLs & policies | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketAcl` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketAcl.html) | | `PutBucketAcl` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketAcl.html) | | `GetObjectAcl` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObjectAcl.html) | | `PutObjectAcl` | ❌ Unsupported | stub; returns 501 | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutObjectAcl.html) | | `GetBucketPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketPolicy.html) | | `PutBucketPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketPolicy.html) | | `DeleteBucketPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketPolicy.html) | ### Versioning | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketVersioning` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketVersioning.html) | | `PutBucketVersioning` | ✅ Supported | Enabled and Suspended, with AWS's semantics for both; objects that predate the change become their key's null version | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketVersioning.html) | | `ListObjectVersions` | ✅ Supported | Versions and delete markers in AWS's order (key ascending, then most recent first), with prefix, delimiter, max-keys and key-marker/version-id-marker pagination | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListObjectVersions.html) | ### Tagging | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketTagging` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketTagging.html) | | `PutBucketTagging` | ✅ Supported | Up to 50 tags, unique keys, key 1-128 and value 0-256 characters; the tag character set is not validated | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketTagging.html) | | `DeleteBucketTagging` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketTagging.html) | ### Lifecycle | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketLifecycleConfiguration` | ✅ Supported | NoSuchLifecycleConfiguration when none is set; reports x-amz-transition-default-minimum-object-size | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketLifecycleConfiguration.html) | | `PutBucketLifecycleConfiguration` | ⚠️ Partial | Expiration, Transition, NoncurrentVersionExpiration, NoncurrentVersionTransition, ExpiredObjectDeleteMarker, AbortIncompleteMultipartUpload and prefix/tag/size filters are applied by an hourly sweeper; x-amz-transition-default-minimum-object-size gates transitions of objects under 128 KB, noncurrent ones included; expiring the current version of a versioned object adds a delete marker rather than deleting it | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketLifecycleConfiguration.html) | | `DeleteBucketLifecycle` | ✅ Supported | | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteBucketLifecycle.html) | ### Notifications | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `GetBucketNotificationConfiguration` | ✅ Supported | Returns empty config if none set | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketNotificationConfiguration.html) | | `PutBucketNotificationConfiguration` | ✅ Supported | SQS, SNS, Lambda and EventBridge destinations; prefix/suffix filters. Records carry versionId and sequencer; SNS deliveries carry the Records JSON as the notification envelope's Message string with Subject "Amazon S3 Notification", as real S3 does; EventBridge events carry AWS's Object Created/Object Deleted shape, including deletion-type, minus the fields Overcast has no value for | [docs](https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketNotificationConfiguration.html) | ## Related - [S3](/docs/services/s3/index.md) — quick start, what works, and the differences from AWS - [All service pages](/docs/services/index.md)