diff --git a/readme.md b/readme.md
index 40ffecf..9c268bf 100644
--- a/readme.md
+++ b/readme.md
@@ -168,7 +168,7 @@ export const grpc = grpcHTTP({
   timeout: undefined,
 
   // Proxy xhr before request
-  transformRequest: ({ xhr }) => {
+  transformRequest: ({ xhr, data, meta }) => {
     xhr.setRequestHeader('Authorization', 'ANY_TOKEN');
   },
 
@@ -182,7 +182,7 @@ export const grpc = grpcHTTP({
   },
 
   // Proxy result after request
-  transformResponse: ({ data }) => {
+  transformResponse: ({ xhr, data, meta }) => {
     if (!data.success) {
       console.log(data.error);
     }
@@ -357,6 +357,12 @@ await grpc(
 #### All options
 
 ```ts
+interface Meta {
+  token: string;
+}
+
+const grpc = grpcHTTP<Meta>(...);
+
 const result = await grpc(
   whisk_api_user_v2_UserAPI_UpdateSettings, // gRPC method
   { ... }, // gRPC params
@@ -366,6 +372,9 @@ const result = await grpc(
     onDownload: e => console.log(e.loaded / e.total), // download progress with ProgressEvent
     onUpload: e => console.log(e.loaded / e.total), // upload progress with ProgressEvent
     timeout: 2000, // number - timeout for this request with cancel request at the end
+    meta: { // Meta - data for transformRequest and transformResponse methods
+      token: 'CODE',
+    },
   }
 );
 ```
diff --git a/src/http/http.ts b/src/http/http.ts
index 27cc144..5f8826f 100644
--- a/src/http/http.ts
+++ b/src/http/http.ts
@@ -18,7 +18,7 @@ export const grpcCancel = (): Cancel => {
   return CancelFn;
 };
 
-export const grpcHTTP = ({
+export const grpcHTTP = <Meta = unknown>({
   server,
   transformRequest,
   transformResponse,
@@ -27,7 +27,7 @@ export const grpcHTTP = ({
   devtool = false,
   debug = false,
   logger,
-}: ConfigGRPC) => {
+}: ConfigGRPC<Meta>) => {
   if (!isText(server)) {
     throw new Error('No "server" in GRPC config');
   }
@@ -37,7 +37,7 @@ export const grpcHTTP = ({
   return (<T extends Field, K extends Field>(
     field: Service<T, K>,
     values = {} as ServiceRequest<Service<T, K>>,
-    { cancel, onDownload, onUpload, mask, timeout }: LocalGRPC<T> = {}
+    { cancel, onDownload, onUpload, mask, timeout, meta }: LocalGRPC<T, Meta> = {}
   ): Promise<GOutput<ServiceResponse<Service<T, K>>>> => {
     if (isString(cancel) && isFunction(cancels[cancel])) {
       cancels[cancel]();
@@ -181,7 +181,7 @@ export const grpcHTTP = ({
 
       if (isFunction(transformRequest)) {
         // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
-        sendData = (await transformRequest({ xhr, data: values })) || values;
+        sendData = (await transformRequest({ xhr, data: values, meta })) || values;
       }
 
       const encoded = Encode(
@@ -219,11 +219,11 @@ export const grpcHTTP = ({
 
         return data;
       })
-      .then(data => (isFunction(transformResponse) ? transformResponse({ xhr, data }) : data))
+      .then(data => (isFunction(transformResponse) ? transformResponse({ xhr, data, meta }) : data))
       .catch(data => {
         logger?.error(method, data);
         // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
         return { success: false, error: { data } } as GError;
       });
-  }) as GRPC;
+  }) as GRPC<Meta>;
 };
diff --git a/src/http/types.ts b/src/http/types.ts
index 0ad694a..e840bca 100644
--- a/src/http/types.ts
+++ b/src/http/types.ts
@@ -41,7 +41,7 @@ export type GOutput<T> = GSuccess<T> | GError | GResult<T>;
 
 type LoggerFn = (message?: any, ...optionalParams: any[]) => void;
 
-export interface ConfigGRPC {
+export interface ConfigGRPC<Meta = unknown> {
   server: string;
   credentials?: boolean;
   timeout?: number;
@@ -52,8 +52,12 @@ export interface ConfigGRPC {
     error: LoggerFn;
     info: LoggerFn;
   };
-  transformRequest?<T>(params: { xhr: XMLHttpRequest; data: T }): T | void | Promise<T | void>;
-  transformResponse?<T>(params: { xhr: XMLHttpRequest; data: GOutput<T> }): GOutput<T> | Promise<GOutput<T>>;
+  transformRequest?<T>(params: { xhr: XMLHttpRequest; data: T; meta?: Meta }): T | void | Promise<T | void>;
+  transformResponse?<T>(params: {
+    xhr: XMLHttpRequest;
+    data: GOutput<T>;
+    meta?: Meta;
+  }): GOutput<T> | Promise<GOutput<T>>;
 }
 
 export interface Cancel {
@@ -61,7 +65,7 @@ export interface Cancel {
   abort?(): void;
 }
 
-export interface LocalGRPC<T extends Field> {
+export interface LocalGRPC<T extends Field, Meta = unknown> {
   mask?:
     | boolean
     | ('mask' extends keyof FieldGet<T>
@@ -77,18 +81,19 @@ export interface LocalGRPC<T extends Field> {
   timeout?: number;
   onDownload?: (e: ProgressEvent<EventTarget>) => void;
   onUpload?: (e: ProgressEvent<EventTarget>) => void;
+  meta?: Meta;
 }
 
-export type GRPC = <T extends Field, K extends Field>(
+export type GRPC<Meta = unknown> = <T extends Field, K extends Field>(
   ...[field, values, options]: {} extends ServiceRequest<Service<T, K>>
-    ? [Service<T, K>, ServiceRequest<Service<T, K>>?, LocalGRPC<T>?]
-    : [Service<T, K>, ServiceRequest<Service<T, K>>, LocalGRPC<T>?]
+    ? [Service<T, K>, ServiceRequest<Service<T, K>>?, LocalGRPC<T, Meta>?]
+    : [Service<T, K>, ServiceRequest<Service<T, K>>, LocalGRPC<T, Meta>?]
 ) => Promise<GOutput<ServiceResponse<Service<T, K>>>>;
 
-export type GRPCDeep = <T extends Field, K extends Field>(
+export type GRPCDeep<Meta = unknown> = <T extends Field, K extends Field>(
   ...[field, values, options]: {} extends ServiceRequestDeep<Service<T, K>>
-    ? [Service<T, K>, ServiceRequestDeep<Service<T, K>>?, LocalGRPC<T>?]
-    : [Service<T, K>, ServiceRequestDeep<Service<T, K>>, LocalGRPC<T>?]
+    ? [Service<T, K>, ServiceRequestDeep<Service<T, K>>?, LocalGRPC<T, Meta>?]
+    : [Service<T, K>, ServiceRequestDeep<Service<T, K>>, LocalGRPC<T, Meta>?]
 ) => Promise<GOutput<ServiceResponseDeep<Service<DeepReadonly<T>, DeepReadonly<K>>>>>;
 
 // ...[method, params]: T[P]['request'] extends undefined ? [P] : [P, T[P]['request']]
diff --git a/tests/demo.ts b/tests/demo.ts
index a92d06d..b68212c 100644
--- a/tests/demo.ts
+++ b/tests/demo.ts
@@ -36,8 +36,12 @@ const forbidden = () => {
 const TOKEN = '123';
 
 (async () => {
+  interface Meta {
+    token: string;
+  }
+
   // Server config
-  const grpc = grpcHTTP({
+  const grpc = grpcHTTP<Meta>({
     server: 'https://example.com',
     credentials: true,
     debug: false,
@@ -45,13 +49,17 @@ const TOKEN = '123';
     timeout: undefined,
 
     // Proxy xhr before request
-    transformRequest: ({ xhr, data }) => {
+    transformRequest: ({ xhr, data, meta }) => {
       xhr.setRequestHeader('Authorization', TOKEN);
+      console.log(meta?.token);
       return { ...data, x: 1 };
     },
 
     // Proxy result after request
-    transformResponse: ({ data }) => {
+    transformResponse: ({ xhr, data, meta }) => {
+      console.log(xhr.status);
+      console.log(meta?.token);
+
       if (!data.success) {
         alert(`v1.Grpc.Event.GRPCError ${data.error.message ?? ''}`);
 
@@ -67,7 +75,7 @@ const TOKEN = '123';
       }
       return data;
     },
-  }) as GRPCDeep;
+  }) as GRPCDeep<Meta>; // Deep example
 
   // Simple method call
   const user = await grpc(whisk_api_user_v2_UserAPI_GetMe);
@@ -121,6 +129,9 @@ const TOKEN = '123';
       onDownload: e => console.log(e.loaded / e.total),
       onUpload: e => console.log(e.loaded / e.total),
       timeout: 2000,
+      meta: {
+        token: '12',
+      },
     }
   );