diff --git a/pkg/scalers/temporal.go b/pkg/scalers/temporal.go
index f1b5eb476c2..c6b42dbd1aa 100644
--- a/pkg/scalers/temporal.go
+++ b/pkg/scalers/temporal.go
@@ -12,6 +12,7 @@ import (
 	sdk "go.temporal.io/sdk/client"
 	sdklog "go.temporal.io/sdk/log"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
 	v2 "k8s.io/api/autoscaling/v2"
 	"k8s.io/metrics/pkg/apis/external_metrics"
 )
@@ -32,16 +33,16 @@ type temporalScaler struct {
 }
 
 type temporalMetadata struct {
-	ActivationLagThreshold int64    `keda:"name=activationTargetQueueSize, order=triggerMetadata, default=0"`
-	Endpoint               string   `keda:"name=endpoint,       order=triggerMetadata;resolvedEnv"`
-	Namespace              string   `keda:"name=namespace,      order=triggerMetadata, default=default"`
-	TargetQueueSize        int64    `keda:"name=targetQueueSize, order=triggerMetadata, default=5"`
-	QueueName              string   `keda:"name=queueName,      order=triggerMetadata"`
-	QueueTypes             []string `keda:"name=queueTypes,      order=triggerMetadata, optional"`
-	BuildIDs               []string `keda:"name=buildIds,      order=triggerMetadata, optional"`
-	AllActive              bool     `keda:"name=selectAllActive,      order=triggerMetadata, default=true"`
-	Unversioned            bool     `keda:"name=selectUnversioned,    order=triggerMetadata, default=true"`
-	ApiKey                 string   `keda:"name=apiKey,         order=authParams;triggerMetadata, optional"`
+	ActivationTargetQueueSize int64    `keda:"name=activationTargetQueueSize, order=triggerMetadata, default=0"`
+	Endpoint                  string   `keda:"name=endpoint,       order=triggerMetadata;resolvedEnv"`
+	Namespace                 string   `keda:"name=namespace,      order=triggerMetadata, default=default"`
+	TargetQueueSize           int64    `keda:"name=targetQueueSize, order=triggerMetadata, default=5"`
+	QueueName                 string   `keda:"name=queueName,      order=triggerMetadata"`
+	QueueTypes                []string `keda:"name=queueTypes,      order=triggerMetadata, optional"`
+	BuildIDs                  []string `keda:"name=buildIds,      order=triggerMetadata, optional"`
+	AllActive                 bool     `keda:"name=selectAllActive,      order=triggerMetadata, default=true"`
+	Unversioned               bool     `keda:"name=selectUnversioned,    order=triggerMetadata, default=true"`
+	APIKey                    string   `keda:"name=apiKey,         order=authParams;triggerMetadata, optional"`
 
 	triggerIndex int
 }
@@ -50,7 +51,7 @@ func (a *temporalMetadata) Validate() error {
 	if a.TargetQueueSize <= 0 {
 		return fmt.Errorf("targetQueueSize must be a positive number")
 	}
-	if a.ActivationLagThreshold < 0 {
+	if a.ActivationTargetQueueSize < 0 {
 		return fmt.Errorf("activationTargetQueueSize must be a positive number")
 	}
 
@@ -115,7 +116,7 @@ func (s *temporalScaler) GetMetricsAndActivity(ctx context.Context, metricName s
 
 	metric := GenerateMetricInMili(metricName, float64(queueSize))
 
-	return []external_metrics.ExternalMetricValue{metric}, queueSize > s.metadata.ActivationLagThreshold, nil
+	return []external_metrics.ExternalMetricValue{metric}, queueSize > s.metadata.ActivationTargetQueueSize, nil
 }
 
 func (s *temporalScaler) getQueueSize(ctx context.Context) (int64, error) {
@@ -177,18 +178,40 @@ func getCombinedBacklogCount(description sdk.TaskQueueDescription) int64 {
 }
 
 func getTemporalClient(meta *temporalMetadata) (sdk.Client, error) {
-	return sdk.Dial(sdk.Options{
+	options := sdk.Options{
 		HostPort:  meta.Endpoint,
 		Namespace: meta.Namespace,
 		Logger:    sdklog.NewStructuredLogger(slog.Default()),
-		ConnectionOptions: sdk.ConnectionOptions{
-			DialOptions: []grpc.DialOption{
-				grpc.WithConnectParams(grpc.ConnectParams{
-					MinConnectTimeout: 5 * time.Second,
-				}),
+	}
+
+	dialOptions := []grpc.DialOption{
+		grpc.WithConnectParams(grpc.ConnectParams{
+			MinConnectTimeout: 5 * time.Second,
+		}),
+	}
+
+	if meta.APIKey != "" {
+		dialOptions = append(dialOptions, grpc.WithUnaryInterceptor(
+			func(ctx context.Context, method string, req any, reply any,
+				cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+				return invoker(
+					metadata.AppendToOutgoingContext(ctx, "temporal-namespace", meta.Namespace),
+					method,
+					req,
+					reply,
+					cc,
+					opts...,
+				)
 			},
-		},
-	})
+		))
+		options.Credentials = sdk.NewAPIKeyStaticCredentials(meta.APIKey)
+	}
+
+	options.ConnectionOptions = sdk.ConnectionOptions{
+		DialOptions: dialOptions,
+	}
+
+	return sdk.Dial(options)
 }
 
 func parseTemporalMetadata(config *scalersconfig.ScalerConfig, _ logr.Logger) (*temporalMetadata, error) {
diff --git a/pkg/scalers/temporal_test.go b/pkg/scalers/temporal_test.go
index 0b4cef2cbe3..e97c6c57cc6 100644
--- a/pkg/scalers/temporal_test.go
+++ b/pkg/scalers/temporal_test.go
@@ -99,13 +99,13 @@ func TestParseTemporalMetadata(t *testing.T) {
 				"namespace": "default",
 			},
 			wantMeta: &temporalMetadata{
-				Endpoint:               "test:7233",
-				Namespace:              "default",
-				QueueName:              "",
-				TargetQueueSize:        5,
-				ActivationLagThreshold: 0,
-				AllActive:              true,
-				Unversioned:            true,
+				Endpoint:                  "test:7233",
+				Namespace:                 "default",
+				QueueName:                 "",
+				TargetQueueSize:           5,
+				ActivationTargetQueueSize: 0,
+				AllActive:                 true,
+				Unversioned:               true,
 			},
 			wantErr: true,
 		},
@@ -116,13 +116,13 @@ func TestParseTemporalMetadata(t *testing.T) {
 				"queueName": "testxx",
 			},
 			wantMeta: &temporalMetadata{
-				Endpoint:               "test:7233",
-				Namespace:              "default",
-				QueueName:              "testxx",
-				TargetQueueSize:        5,
-				ActivationLagThreshold: 0,
-				AllActive:              true,
-				Unversioned:            true,
+				Endpoint:                  "test:7233",
+				Namespace:                 "default",
+				QueueName:                 "testxx",
+				TargetQueueSize:           5,
+				ActivationTargetQueueSize: 0,
+				AllActive:                 true,
+				Unversioned:               true,
 			},
 			wantErr: false,
 		},
@@ -135,13 +135,13 @@ func TestParseTemporalMetadata(t *testing.T) {
 				"activationTargetQueueSize": "12",
 			},
 			wantMeta: &temporalMetadata{
-				Endpoint:               "test:7233",
-				Namespace:              "default",
-				QueueName:              "testxx",
-				TargetQueueSize:        5,
-				ActivationLagThreshold: 12,
-				AllActive:              true,
-				Unversioned:            true,
+				Endpoint:                  "test:7233",
+				Namespace:                 "default",
+				QueueName:                 "testxx",
+				TargetQueueSize:           5,
+				ActivationTargetQueueSize: 12,
+				AllActive:                 true,
+				Unversioned:               true,
 			},
 			wantErr: false,
 		},
@@ -154,14 +154,14 @@ func TestParseTemporalMetadata(t *testing.T) {
 				"apiKey":    "test01",
 			},
 			wantMeta: &temporalMetadata{
-				Endpoint:               "test:7233",
-				Namespace:              "default",
-				QueueName:              "testxx",
-				TargetQueueSize:        5,
-				ActivationLagThreshold: 0,
-				AllActive:              true,
-				Unversioned:            true,
-				ApiKey:                 "test01",
+				Endpoint:                  "test:7233",
+				Namespace:                 "default",
+				QueueName:                 "testxx",
+				TargetQueueSize:           5,
+				ActivationTargetQueueSize: 0,
+				AllActive:                 true,
+				Unversioned:               true,
+				APIKey:                    "test01",
 			},
 			authParams: map[string]string{
 				"apiKey": "test01",
@@ -177,14 +177,14 @@ func TestParseTemporalMetadata(t *testing.T) {
 				"queueTypes": "workflow,activity",
 			},
 			wantMeta: &temporalMetadata{
-				Endpoint:               "test:7233",
-				Namespace:              "default",
-				QueueName:              "testxx",
-				TargetQueueSize:        5,
-				ActivationLagThreshold: 0,
-				AllActive:              true,
-				Unversioned:            true,
-				QueueTypes:             []string{"workflow", "activity"},
+				Endpoint:                  "test:7233",
+				Namespace:                 "default",
+				QueueName:                 "testxx",
+				TargetQueueSize:           5,
+				ActivationTargetQueueSize: 0,
+				AllActive:                 true,
+				Unversioned:               true,
+				QueueTypes:                []string{"workflow", "activity"},
 			},
 			wantErr: false,
 		},