diff --git a/README.md b/README.md
index 2b9a439..c938012 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,11 @@ After connecting, the Viam specific extensions for reading and writing can be ca
   await device.writeRobotPartConfig(
     partId: 'id',
     secret: 'secret',
+    // apiKey is the preferred but optional authentication method
+    apiKey: APIKey(
+      id: 'keyID',
+      key: 'key'
+    ),
   );
   await device.exitProvisioning();
 ```
diff --git a/lib/src/api_key.dart b/lib/src/api_key.dart
new file mode 100644
index 0000000..d03a9e4
--- /dev/null
+++ b/lib/src/api_key.dart
@@ -0,0 +1,12 @@
+part of '../viam_bluetooth_provisioning.dart';
+
+class APIKey {
+  final String id;
+  final String key;
+
+  APIKey({required this.id, required this.key});
+
+  String toJson() {
+    return jsonEncode({'id': id, 'key': key});
+  }
+}
diff --git a/lib/src/bluetooth_device_extensions.dart b/lib/src/bluetooth_device_extensions.dart
index dd730a8..094445e 100644
--- a/lib/src/bluetooth_device_extensions.dart
+++ b/lib/src/bluetooth_device_extensions.dart
@@ -153,6 +153,7 @@ extension ViamWriting on BluetoothDevice {
   Future<void> writeRobotPartConfig({
     required String partId,
     required String secret,
+    APIKey? apiKey,
     String appAddress = 'https://app.viam.com:443',
     String psk = 'viamsetup',
   }) async {
@@ -186,6 +187,15 @@ extension ViamWriting on BluetoothDevice {
       orElse: () => throw Exception('appAddressCharacteristic not found'),
     );
     await appAddressCharacteristic.write(encodedAppAddress);
+
+    if (apiKey != null) {
+      final encodedApiKey = encoder.process(utf8.encode('$psk:${apiKey.toJson()}'));
+      final apiKeyCharacteristic = bleService.characteristics.firstWhere(
+        (char) => char.uuid.str == ViamBluetoothUUIDs.apiKeyCredsUUID,
+        orElse: () => throw Exception('apiKeyCharacteristic not found'),
+      );
+      await apiKeyCharacteristic.write(encodedApiKey);
+    }
   }
 
   Future<void> exitProvisioning({String psk = 'viamsetup'}) async {
diff --git a/lib/src/viam_bluetooth_uuids.dart b/lib/src/viam_bluetooth_uuids.dart
index d4856e7..9d25c45 100644
--- a/lib/src/viam_bluetooth_uuids.dart
+++ b/lib/src/viam_bluetooth_uuids.dart
@@ -7,6 +7,7 @@ class ViamBluetoothUUIDs {
   static String pskUUID = _uuid.v5(_namespace, _pskKey);
   static String robotPartUUID = _uuid.v5(_namespace, _robotPartIDKey);
   static String robotPartSecretUUID = _uuid.v5(_namespace, _robotPartSecretKey);
+  static String apiKeyCredsUUID = _uuid.v5(_namespace, _apiKeyCredsKey);
   static String appAddressUUID = _uuid.v5(_namespace, _appAddressKey);
   static String statusUUID = _uuid.v5(_namespace, _statusKey);
   static String cryptoUUID = _uuid.v5(_namespace, _cryptoKey);
@@ -25,6 +26,7 @@ class ViamBluetoothUUIDs {
   static const String _pskKey = 'psk';
   static const String _robotPartIDKey = 'id';
   static const String _robotPartSecretKey = 'secret';
+  static const String _apiKeyCredsKey = 'api_key';
   static const String _appAddressKey = 'app_address';
   static const String _statusKey = 'status';
   static const String _cryptoKey = 'pub_key';
diff --git a/lib/viam_bluetooth_provisioning.dart b/lib/viam_bluetooth_provisioning.dart
index c2ea62a..b5824d7 100644
--- a/lib/viam_bluetooth_provisioning.dart
+++ b/lib/viam_bluetooth_provisioning.dart
@@ -14,3 +14,4 @@ part 'src/wifi_network.dart';
 part 'src/viam_bluetooth_uuids.dart';
 part 'src/viam_bluetooth_provisioning.dart';
 part 'src/bluetooth_device_extensions.dart';
+part 'src/api_key.dart';
diff --git a/viam_example_app/lib/provision_peripheral_screen.dart b/viam_example_app/lib/provision_peripheral_screen.dart
index 9a6e11c..095c4f1 100644
--- a/viam_example_app/lib/provision_peripheral_screen.dart
+++ b/viam_example_app/lib/provision_peripheral_screen.dart
@@ -17,6 +17,8 @@ class _ProvisionPeripheralScreen extends State<ProvisionPeripheralScreen> {
   final TextEditingController _partIdTextController = TextEditingController();
   final TextEditingController _secretTextController = TextEditingController();
   final TextEditingController _appAddressTextController = TextEditingController();
+  final TextEditingController _apiKeyIdTextController = TextEditingController();
+  final TextEditingController _apiKeyKeyTextController = TextEditingController();
 
   List<String> _networkList = [];
 
@@ -47,6 +49,8 @@ class _ProvisionPeripheralScreen extends State<ProvisionPeripheralScreen> {
     _partIdTextController.dispose();
     _secretTextController.dispose();
     _appAddressTextController.dispose();
+    _apiKeyIdTextController.dispose();
+    _apiKeyKeyTextController.dispose();
     super.dispose();
   }
 
@@ -137,10 +141,18 @@ class _ProvisionPeripheralScreen extends State<ProvisionPeripheralScreen> {
       final partId = _partIdTextController.text;
       final secret = _secretTextController.text;
       final appAddress = _appAddressTextController.text;
+      final apiKeyId = _apiKeyIdTextController.text.trim();
+      final apiKeyKey = _apiKeyKeyTextController.text.trim();
+
+      APIKey? apiKey;
+      if (apiKeyId.isNotEmpty && apiKeyKey.isNotEmpty) {
+        apiKey = APIKey(id: apiKeyId, key: apiKeyKey);
+      }
       await widget.device.writeRobotPartConfig(
         partId: partId,
         secret: secret,
         appAddress: appAddress,
+        apiKey: apiKey,
       );
       _showSnackBar('Wrote robot part config');
     } catch (e) {
@@ -230,6 +242,14 @@ class _ProvisionPeripheralScreen extends State<ProvisionPeripheralScreen> {
                 controller: _secretTextController,
                 decoration: const InputDecoration(labelText: 'Secret'),
               ),
+              TextField(
+                controller: _apiKeyIdTextController,
+                decoration: const InputDecoration(labelText: 'API Key ID', hintText: '(will be used instead of secret if provided)'),
+              ),
+              TextField(
+                controller: _apiKeyKeyTextController,
+                decoration: const InputDecoration(labelText: 'API Key', hintText: '(will be used instead of secret if provided)'),
+              ),
               TextField(
                 controller: _appAddressTextController,
                 decoration: const InputDecoration(labelText: 'App Address'),