diff --git a/guides/authentication.md b/guides/authentication.md
index 2d1d301301..6a1b5a509c 100644
--- a/guides/authentication.md
+++ b/guides/authentication.md
@@ -20,6 +20,7 @@ To utilize authentication in browsers using the SDK you need to use the `client.
       - [Customize redirect URL](#customize-redirect-url-1)
   - [Advance](#advance)
     - [Manually trigger authentication](#manually-trigger-authentication)
+    - [Cache access tokens](#cache-access-tokens)
     - [Skip authentication](#skip-authentication)
     - [Combine different authentication methods](#combine-different-authentication-methods)
     - [Tokens](#tokens)
@@ -157,6 +158,17 @@ client.loginWithOAuth({
 await client.authenticate(); // this will also return a boolean based on if the user successfully authenticated or not.
 ```
 
+### Cache access tokens
+
+If you already have a valid access token you can use it to skip the authentication flow (see this [section](#tokens) on how to get hold of the token).
+```js
+client.loginWithOAuth({
+  project: 'YOUR PROJECT NAME HERE',
+  accessToken: 'ACCESS TOKEN FOR THE PROJECT HERE',
+});
+```
+> `client.authenticate()` will still override this and trigger a new authentication flow.
+
 ### Skip authentication
 
 It is possible to skip the authentication like this:
diff --git a/src/__tests__/cogniteClient.spec.ts b/src/__tests__/cogniteClient.spec.ts
index 62fb2c2127..24fffded6b 100644
--- a/src/__tests__/cogniteClient.spec.ts
+++ b/src/__tests__/cogniteClient.spec.ts
@@ -333,6 +333,39 @@ describe('CogniteClient', () => {
         expect(promise401Throwed).toBe(true);
         await expect(promiseAuthenticate).resolves.toBe(false);
       });
+
+      describe('cached access token', () => {
+        test('should be able to provide an access token', async () => {
+          const client = setupClient(mockBaseUrl);
+          client.loginWithOAuth({
+            project,
+            accessToken: authTokens.accessToken,
+          });
+          nock(mockBaseUrl, {
+            reqheaders: {
+              [AUTHORIZATION_HEADER]: bearerString(authTokens.accessToken),
+            },
+          })
+            .get('/')
+            .once()
+            .reply(200, {});
+          await client.get('/');
+        });
+
+        test('re-authenticate on 401', async done => {
+          const client = setupClient(mockBaseUrl);
+          client.loginWithOAuth({
+            project,
+            accessToken: authTokens.accessToken,
+            onAuthenticate: () => done(),
+          });
+          nock(mockBaseUrl)
+            .get('/')
+            .once()
+            .reply(401, {});
+          client.get('/');
+        });
+      });
     });
   });
 });
diff --git a/src/__tests__/resources/groups.integration.spec.ts b/src/__tests__/resources/groups.integration.spec.ts
index 47b2925689..d494f52c3d 100644
--- a/src/__tests__/resources/groups.integration.spec.ts
+++ b/src/__tests__/resources/groups.integration.spec.ts
@@ -73,7 +73,9 @@ describe('Groups integration test', () => {
   });
 
   test('delete', async () => {
-    const response = await client.groups.delete([group.id]);
-    expect(response).toEqual({});
+    await runTestWithRetryWhenFailing(async () => {
+      const response = await client.groups.delete([group.id]);
+      expect(response).toEqual({});
+    });
   });
 });
diff --git a/src/cogniteClient.ts b/src/cogniteClient.ts
index 24c223c5ef..f2c0957e38 100644
--- a/src/cogniteClient.ts
+++ b/src/cogniteClient.ts
@@ -61,6 +61,10 @@ export const POPUP = 'POPUP';
 export interface OAuthLoginOptions extends Project {
   onAuthenticate?: OnAuthenticate | 'REDIRECT' | 'POPUP';
   onTokens?: OnTokens;
+  /**
+   * Provide optional cached access token to skip the authentication flow (client.authenticate will still override this).
+   */
+  accessToken?: string;
 }
 
 function validateAndReturnAPI<T>(api: T | undefined): T {
@@ -274,12 +278,13 @@ export default class CogniteClient {
     this.projectName = project;
 
     const onTokens = options.onTokens || (() => {});
-    let onAuthenticate: OnAuthenticate = onAuthenticateWithRedirect;
-    if (options.onAuthenticate === POPUP) {
-      onAuthenticate = onAuthenticateWithPopup;
-    } else if (isFunction(options.onAuthenticate)) {
-      onAuthenticate = options.onAuthenticate;
-    }
+    const onAuthenticate =
+      options.onAuthenticate === POPUP
+        ? onAuthenticateWithPopup
+        : isFunction(options.onAuthenticate)
+          ? options.onAuthenticate
+          : onAuthenticateWithRedirect;
+
     const authenticate = createAuthenticateFunction({
       project,
       httpClient: this.httpClient,
@@ -292,6 +297,11 @@ export default class CogniteClient {
       return didAuthenticate ? retry() : reject();
     });
 
+    const { accessToken } = options;
+    if (accessToken) {
+      this.httpClient.setBearerToken(accessToken);
+    }
+
     this.initAPIs();
     this.authenticate = authenticate;
   };