diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
index 5452da6..c3d8aaf 100644
--- a/src/__tests__/index.test.ts
+++ b/src/__tests__/index.test.ts
@@ -59,9 +59,18 @@ describe('index', () => {
     expect(result5).toBeUndefined();
     expect(requestLoginLink).toBeCalledWith(storedOptions, { loginLinkTo: 'settings' });
 
-    mocked(exchangeToken).mockResolvedValueOnce('test');
+    const token = {
+      access_token: 'access_token',
+      refresh_token: 'refresh_token',
+      expires_in: 3600,
+      token_type: 'bearer',
+      scope: 'guest_read',
+      created_at: Date.now(),
+      resource_server: 'jp-api'
+    };
+    mocked(exchangeToken).mockResolvedValueOnce(token);
     const result6 = await instance.exchangeToken({ code: 'code' });
-    expect(result6).toBe('test');
+    expect(result6).toEqual(token);
     expect(exchangeToken).toBeCalledWith(storedOptions, { code: 'code' });
 
     // @ts-ignore: set tokenInfo with invalid type value
diff --git a/src/api/__tests__/exchange-token.test.ts b/src/api/__tests__/exchange-token.test.ts
index 212795d..f9d26d2 100644
--- a/src/api/__tests__/exchange-token.test.ts
+++ b/src/api/__tests__/exchange-token.test.ts
@@ -11,7 +11,15 @@ describe('api', () => {
     const clientId = 'clientId';
     const code = 'code';
     const redirectUri = 'redirectUri';
-    const token = 'token';
+    const token = {
+      access_token: 'access_token',
+      refresh_token: 'refresh_token',
+      expires_in: 3600,
+      token_type: 'bearer',
+      scope: 'guest_read',
+      created_at: Date.now(),
+      resource_server: 'jp-api'
+    };
     const state = 'state';
 
     const mtLinkSdk = new MtLinkSdk();
@@ -48,8 +56,7 @@ describe('api', () => {
 
     test('make request', async () => {
       fetch.mockClear();
-
-      fetch.mockResponseOnce(JSON.stringify({ access_token: token }));
+      fetch.mockResponseOnce(JSON.stringify(token));
 
       await exchangeToken(mtLinkSdk.storedOptions, { code, codeVerifier: '' });
 
@@ -94,14 +101,12 @@ describe('api', () => {
 
     test('auto extract code from url query if no code was passed', async () => {
       fetch.mockClear();
+      fetch.mockResponseOnce(JSON.stringify(token));
 
-      const code1 = 'code1';
-      const code2 = 'code2';
-
-      fetch.mockResponseOnce(JSON.stringify({ access_token: token }));
+      const code = 'realCode';
 
       jest.spyOn(window, 'location', 'get').mockReturnValueOnce({
-        search: `?code=${code1}&code=${code2}`
+        search: `?code=otherCode&code=${code}`
       } as typeof window.location);
 
       await exchangeToken(mtLinkSdk.storedOptions, { state });
@@ -109,21 +114,20 @@ describe('api', () => {
       const result = fetch.mock.calls[0][1] || {};
       const data = JSON.parse(result.body as string);
 
-      expect(data.code).toBe(code2);
+      expect(data.code).toBe(code);
     });
 
     test('auto extract state from url query if no state was passed or set during init', async () => {
       fetch.mockClear();
-
-      const state1 = 'state1';
-
-      fetch.mockResponseOnce(JSON.stringify({ access_token: token }));
+      fetch.mockResponseOnce(JSON.stringify(token));
 
       jest.spyOn(window, 'location', 'get').mockReturnValueOnce({
-        search: `?state=${state1}&state=${state}`
+        search: `?state=otherState&state=${state}`
       } as typeof window.location);
 
-      await expect(exchangeToken(mtLinkSdk.storedOptions, { code, redirectUri })).resolves.toBe(token);
+      const actual = await exchangeToken(mtLinkSdk.storedOptions, { code, redirectUri });
+
+      expect(actual).toEqual(token);
     });
 
     test('non browser environment will not auto extract code from url', async () => {
diff --git a/src/api/exchange-token.ts b/src/api/exchange-token.ts
index 19013dd..1d6852e 100644
--- a/src/api/exchange-token.ts
+++ b/src/api/exchange-token.ts
@@ -2,7 +2,7 @@ import qs from 'qs';
 
 import { generateSdkHeaderInfo } from '../helper';
 import { MY_ACCOUNT_DOMAINS } from '../server-paths';
-import { StoredOptions, ExchangeTokenOptions } from '../typings';
+import { StoredOptions, ExchangeTokenOptions, Token } from '../typings';
 import storage from '../storage';
 
 function getCode(): string | undefined {
@@ -21,7 +21,7 @@ function getCode(): string | undefined {
 export default async function exchangeToken(
   storedOptions: StoredOptions,
   options: ExchangeTokenOptions = {}
-): Promise<string> {
+): Promise<Token> {
   const { clientId, redirectUri: defaultRedirectUri, mode } = storedOptions;
 
   if (!clientId) {
@@ -64,7 +64,7 @@ export default async function exchangeToken(
       throw new Error(result.error_description);
     }
 
-    return result.access_token;
+    return result as Token;
   } catch (error) {
     throw new Error(`[mt-link-sdk] \`exchangeToken\` execution failed. ${error}`);
   }
diff --git a/src/index.ts b/src/index.ts
index 8259366..6c9d27a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -10,6 +10,7 @@ import requestLoginLink from './api/request-login-link';
 import exchangeToken from './api/exchange-token';
 import tokenInfo from './api/token-info';
 import {
+  Token,
   StoredOptions,
   ServiceId,
   LogoutOptions,
@@ -141,7 +142,7 @@ export class MtLinkSdk {
     return requestLoginLink(this.storedOptions, options);
   }
 
-  public exchangeToken(options?: ExchangeTokenOptions): Promise<string> {
+  public exchangeToken(options?: ExchangeTokenOptions): Promise<Token> {
     return exchangeToken(this.storedOptions, options);
   }
 
diff --git a/src/typings.ts b/src/typings.ts
index dcd23bc..3cda954 100644
--- a/src/typings.ts
+++ b/src/typings.ts
@@ -170,3 +170,13 @@ export interface TokenInfo {
     lang: string;
   };
 }
+
+export interface Token {
+  access_token: string;
+  refresh_token: string;
+  token_type: string;
+  created_at: number;
+  expires_in: number;
+  scope: string;
+  resource_server: string;
+}