diff --git a/weed/s3api/s3api_bucket_handlers.go b/weed/s3api/s3api_bucket_handlers.go
index eaff6d442..b318ee306 100644
--- a/weed/s3api/s3api_bucket_handlers.go
+++ b/weed/s3api/s3api_bucket_handlers.go
@@ -565,6 +565,31 @@ func (s3a *S3ApiServer) checkBucket(r *http.Request, bucket string) s3err.ErrorC
 	return s3err.ErrNone
 }
 
+// autoCreateBucket creates a bucket if it doesn't exist, setting the owner from the request context
+func (s3a *S3ApiServer) autoCreateBucket(r *http.Request, bucket string) error {
+	currentIdentityId := s3_constants.GetIdentityNameFromContext(r)
+	fn := func(entry *filer_pb.Entry) {
+		if currentIdentityId != "" {
+			if entry.Extended == nil {
+				entry.Extended = make(map[string][]byte)
+			}
+			entry.Extended[s3_constants.AmzIdentityId] = []byte(currentIdentityId)
+		}
+	}
+	
+	if err := s3a.mkdir(s3a.option.BucketsPath, bucket, fn); err != nil {
+		return fmt.Errorf("failed to auto-create bucket %s: %w", bucket, err)
+	}
+	
+	// Remove bucket from negative cache after successful creation
+	if s3a.bucketConfigCache != nil {
+		s3a.bucketConfigCache.RemoveNegativeCache(bucket)
+	}
+	
+	glog.V(1).Infof("Auto-created bucket %s for identity %s", bucket, currentIdentityId)
+	return nil
+}
+
 func (s3a *S3ApiServer) hasAccess(r *http.Request, entry *filer_pb.Entry) bool {
 	// Check if user is properly authenticated as admin through IAM system
 	if s3a.isUserAdmin(r) {
diff --git a/weed/s3api/s3api_object_handlers_multipart.go b/weed/s3api/s3api_object_handlers_multipart.go
index ba9886d66..eabd4fe7a 100644
--- a/weed/s3api/s3api_object_handlers_multipart.go
+++ b/weed/s3api/s3api_object_handlers_multipart.go
@@ -33,8 +33,16 @@ const (
 func (s3a *S3ApiServer) NewMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
 	bucket, object := s3_constants.GetBucketAndObject(r)
 
-	// Check if bucket exists before creating multipart upload
-	if err := s3a.checkBucket(r, bucket); err != s3err.ErrNone {
+	// Check if bucket exists, and create it if it doesn't (auto-create bucket)
+	if err := s3a.checkBucket(r, bucket); err == s3err.ErrNoSuchBucket {
+		// Auto-create bucket if it doesn't exist
+		if mkdirErr := s3a.autoCreateBucket(r, bucket); mkdirErr != nil {
+			glog.Errorf("NewMultipartUploadHandler: %v", mkdirErr)
+			s3err.WriteErrorResponse(w, r, s3err.ErrInternalError)
+			return
+		}
+	} else if err != s3err.ErrNone {
+		// Other errors (like access denied) should still fail
 		s3err.WriteErrorResponse(w, r, err)
 		return
 	}
diff --git a/weed/s3api/s3api_object_handlers_put.go b/weed/s3api/s3api_object_handlers_put.go
index c618405ca..0caf5d025 100644
--- a/weed/s3api/s3api_object_handlers_put.go
+++ b/weed/s3api/s3api_object_handlers_put.go
@@ -135,12 +135,19 @@ func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request)
 		versioningState, err := s3a.getVersioningState(bucket)
 		if err != nil {
 			if errors.Is(err, filer_pb.ErrNotFound) {
-				s3err.WriteErrorResponse(w, r, s3err.ErrNoSuchBucket)
+				// Auto-create bucket if it doesn't exist
+				if mkdirErr := s3a.autoCreateBucket(r, bucket); mkdirErr != nil {
+					glog.Errorf("PutObjectHandler: %v", mkdirErr)
+					s3err.WriteErrorResponse(w, r, s3err.ErrInternalError)
+					return
+				}
+				// After creating the bucket, versioning state is empty (not configured)
+				versioningState = ""
+			} else {
+				glog.Errorf("Error checking versioning status for bucket %s: %v", bucket, err)
+				s3err.WriteErrorResponse(w, r, s3err.ErrInternalError)
 				return
 			}
-			glog.Errorf("Error checking versioning status for bucket %s: %v", bucket, err)
-			s3err.WriteErrorResponse(w, r, s3err.ErrInternalError)
-			return
 		}
 
 		versioningEnabled := (versioningState == s3_constants.VersioningEnabled)