diff --git a/src/models/OnspringClient.ts b/src/models/OnspringClient.ts
index 232f5d9..46b41e4 100644
--- a/src/models/OnspringClient.ts
+++ b/src/models/OnspringClient.ts
@@ -12,6 +12,9 @@ import { App } from './App';
  * @class OnspringClient - A client that can communicate with the Onspring API.
  */
 export class OnspringClient {
+  getAppsByIds(getAppsByIds: any) {
+    throw new Error('Method not implemented.');
+  }
   /**
    * @readonly {AxiosInstance} client - The axios instance that will be used to make requests to the Onspring API.
    */
diff --git a/tests/OnspringClient.spec.ts b/tests/OnspringClient.spec.ts
index 6c5142c..b489081 100644
--- a/tests/OnspringClient.spec.ts
+++ b/tests/OnspringClient.spec.ts
@@ -506,4 +506,31 @@ describe('OnspringClient', function () {
       expect(result.data).to.be.null;
     });
   });
+
+  describe('getAppsByIds', function () {
+    it('should be defined', function () {
+      expect(new OnspringClient(baseUrl, apiKey).getAppsByIds).to.not.be
+        .undefined;
+    });
+
+    it('should be a function', function () {
+      expect(new OnspringClient(baseUrl, apiKey).getAppsByIds).to.be.a(
+        'function'
+      );
+    });
+
+    it('should have 1 parameter', function () {
+      expect(new OnspringClient(baseUrl, apiKey).getAppsByIds).to.have.lengthOf(
+        1
+      );
+    });
+
+    it('should return a promise', function () {
+      expect(
+        new OnspringClient(baseUrl, apiKey).getAppsByIds([1, 2, 3])
+      ).to.be.a('promise');
+    });
+
+    // TODO: complete wriiting tests for getAppsByIds method
+  });
 });