diff --git a/src/client/API.ts b/src/client/API.ts
index eeec1fe..7dba1d4 100644
--- a/src/client/API.ts
+++ b/src/client/API.ts
@@ -16,11 +16,18 @@ import { Metadata } from '@grpc/grpc-js';
 import { KV, RequestWithMeta, Map } from '../types/common';
 
 export class API {
-  createMetadata(request: RequestWithMeta<{}>): Metadata {
+  createMetadata(request: RequestWithMeta<{}>, defaultRequestMeta?: Record<string, string>): Metadata {
     const metadata = new Metadata();
-    if (!request.requestMeta) return metadata;
-    for (const key of Object.keys(request.requestMeta)) {
-      metadata.add(key, request.requestMeta[key]);
+    if (defaultRequestMeta) {
+      for (const key in defaultRequestMeta) {
+        metadata.add(key, defaultRequestMeta[key]);
+      }
+    }
+
+    if (request.requestMeta) {
+      for (const key of Object.keys(request.requestMeta)) {
+        metadata.add(key, request.requestMeta[key]);
+      }
     }
     return metadata;
   }
diff --git a/src/client/Cryption.ts b/src/client/Cryption.ts
index f9c3d7d..e9b6b8a 100644
--- a/src/client/Cryption.ts
+++ b/src/client/Cryption.ts
@@ -26,6 +26,8 @@ export type DecryptResponse = {
 
 export type CryptionOptions = {
   componentName: string;
+  // set default metadata on every request
+  defaultRequestMeta?: Record<string, string>;
 };
 
 export default class Cryption extends API {
@@ -50,8 +52,9 @@ export default class Cryption extends API {
       req.setKeyId(request.keyId);
     }
 
+    const metadata = this.createMetadata(request, this.options.defaultRequestMeta);
     return new Promise((resolve, reject) => {
-      this.cryptionClient.encrypt(req, this.createMetadata(request), (err, res: EncryptResponse) => {
+      this.cryptionClient.encrypt(req, metadata, (err, res: EncryptResponse) => {
         if (err) return reject(err);
         resolve(res.toObject());
       });
@@ -63,8 +66,9 @@ export default class Cryption extends API {
     req.setComponentName(this.options.componentName);
     req.setCipherText(request.cipherText);
 
+    const metadata = this.createMetadata(request, this.options.defaultRequestMeta);
     return new Promise((resolve, reject) => {
-      this.cryptionClient.decrypt(req, this.createMetadata(request), (err, res: DecryptResponsePB) => {
+      this.cryptionClient.decrypt(req, metadata, (err, res: DecryptResponsePB) => {
         if (err) return reject(err);
         const plainText = Buffer.from(res.getPlainText_asB64(), 'base64');
         resolve({
diff --git a/test/unit/client/Cryption.test.ts b/test/unit/client/Cryption.test.ts
index 4e5d4a0..841081f 100644
--- a/test/unit/client/Cryption.test.ts
+++ b/test/unit/client/Cryption.test.ts
@@ -6,7 +6,7 @@ describe.skip('Cryption.test.ts', () => {
   const componentName = 'cryption_demo';
 
   beforeAll(() => {
-    client = new Client('34904', '127.0.0.1', { cryption: { componentName } });
+    client = new Client('34904', '127.0.0.1', { cryption: { componentName, defaultRequestMeta: {} } });
   });
 
   it('should encrypt and decrypt success', async () => {