diff --git a/api/clients/v2/dispersal_request_signer.go b/api/clients/v2/dispersal_request_signer.go
index 547c26974..871c36788 100644
--- a/api/clients/v2/dispersal_request_signer.go
+++ b/api/clients/v2/dispersal_request_signer.go
@@ -8,6 +8,7 @@ import (
 	grpc "github.com/Layr-Labs/eigenda/api/grpc/node/v2"
 	"github.com/Layr-Labs/eigenda/api/hashing"
 	aws2 "github.com/Layr-Labs/eigenda/common/aws"
+	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/service/kms"
 )
@@ -31,6 +32,7 @@ type requestSigner struct {
 func NewDispersalRequestSigner(
 	ctx context.Context,
 	region string,
+	endpoint string,
 	keyID string) (DispersalRequestSigner, error) {
 
 	// Load the AWS SDK configuration, which will automatically detect credentials
@@ -42,7 +44,16 @@ func NewDispersalRequestSigner(
 		return nil, fmt.Errorf("failed to load AWS config: %w", err)
 	}
 
-	keyManager := kms.NewFromConfig(cfg)
+	var keyManager *kms.Client
+	if endpoint != "" {
+		keyManager = kms.New(kms.Options{
+			Region:       region,
+			BaseEndpoint: aws.String(endpoint),
+		})
+	} else {
+		keyManager = kms.NewFromConfig(cfg)
+	}
+
 	key, err := aws2.LoadPublicKeyKMS(ctx, keyManager, keyID)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get ecdsa public key: %w", err)
diff --git a/api/clients/v2/dispersal_request_signer_test.go b/api/clients/v2/dispersal_request_signer_test.go
index 465b040fa..3e8daa9e7 100644
--- a/api/clients/v2/dispersal_request_signer_test.go
+++ b/api/clients/v2/dispersal_request_signer_test.go
@@ -100,7 +100,7 @@ func TestRequestSigning(t *testing.T) {
 			request := auth.RandomStoreChunksRequest(rand)
 			request.Signature = nil
 
-			signer, err := NewDispersalRequestSigner(context.Background(), region, keyID)
+			signer, err := NewDispersalRequestSigner(context.Background(), region, localstackHost, keyID)
 			require.NoError(t, err)
 
 			// Test a valid signature.
diff --git a/disperser/cmd/controller/main.go b/disperser/cmd/controller/main.go
index ba5f180e6..b59e6ecea 100644
--- a/disperser/cmd/controller/main.go
+++ b/disperser/cmd/controller/main.go
@@ -158,6 +158,7 @@ func RunController(ctx *cli.Context) error {
 		requestSigner, err = clients.NewDispersalRequestSigner(
 			context.Background(),
 			config.AwsClientConfig.Region,
+			config.AwsClientConfig.EndpointURL,
 			config.DisperserKMSKeyID)
 		if err != nil {
 			return fmt.Errorf("failed to create request signer: %v", err)