diff --git a/src/nativeSdkHelpers.interfaces.ts b/src/nativeSdkHelpers.interfaces.ts
new file mode 100644
index 00000000..1d5a2ec0
--- /dev/null
+++ b/src/nativeSdkHelpers.interfaces.ts
@@ -0,0 +1,13 @@
+export interface INativeSdkHelpers {
+    initializeSessionAttributes: (apiKey: string) => void;
+    isBridgeV2Available: (bridgeName: string) => boolean;
+    isWebviewEnabled: (
+        requiredWebviewBridgeName: string,
+        minWebviewBridgeVersion: number
+    ) => boolean;
+    isBridgeV1Available: () => boolean;
+    sendToNative: (path: string, value: string) => void;
+    sendViaBridgeV1: (path: string, value: string) => void;
+    sendViaIframeToIOS: (path: string, value: string) => void;
+    sendViaBridgeV2: (path: string, value: string, requiredWebviewBridgeName: boolean) => void;
+}
diff --git a/src/sdkRuntimeModels.ts b/src/sdkRuntimeModels.ts
index 9f6c5a9c..16110538 100644
--- a/src/sdkRuntimeModels.ts
+++ b/src/sdkRuntimeModels.ts
@@ -31,6 +31,7 @@ import {
 } from './identity-user-interfaces';
 import { IIdentityType } from './types.interfaces';
 import IntegrationCapture from './integrationCapture';
+import { INativeSdkHelpers } from './nativeSdkHelpers.interfaces';
 import { ICookieSyncManager } from './cookieSyncManager.interfaces';
 
 // TODO: Resolve this with version in @mparticle/web-sdk
@@ -169,7 +170,7 @@ export interface MParticleWebSDK {
     _SessionManager: ISessionManager;
     _Consent: SDKConsentApi;
     Consent: SDKConsentApi;
-    _NativeSdkHelpers: any; // TODO: Set up API
+    _NativeSdkHelpers: INativeSdkHelpers;
     _Persistence: IPersistence;
     _preInit: any; // TODO: Set up API
     _instances?: Dictionary<MParticleWebSDK>;