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5.3.1 • Public • Published

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Frontegg Node.js Client

Frontegg is a web platform where SaaS companies can set up their fully managed, scalable and brand aware - SaaS features and integrate them into their SaaS portals in up to 5 lines of code.

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Table of Contents

Breaking Changes

  • As of version 3.0.0 and 4.0.0, we will no longer provide proxy middlewares

  • As of version 5.0.0, node 12 is no loner supported.

To see an example implementation, head over to our sample proxy project


Install the package using npm

# node 14+
npm install @frontegg/client


Frontegg offers multiple components for integration with the Frontegg's scaleable back end and front end libraries

Initialize the frontegg context when initializing your app

const { FronteggContext } = require('@frontegg/client');



Use Frontegg's "withAuthentication" auth guard to protect your routes.

A simple usage example:

const { withAuthentication } = require('@frontegg/client');

// This route can now only be accessed by authenticated users
app.use('/protected', withAuthentication(), (req, res) => {
  // Authenticated user data will be available on the req.frontegg object

Head over to the Docs to find more usage examples of the guard.

Access tokens

When using M2M authentication, access tokens will be cached by the SDK. By default access tokens will be cached locally, however you can use two other kinds of cache:

  • ioredis
  • redis

Use ioredis as your cache

When initializing your context, pass an access tokens options object with your ioredis parameters

const { FronteggContext } = require('@frontegg/client');

const accessTokensOptions = {
  cache: {
    type: 'ioredis',
    options: {
      host: 'localhost',
      port: 6379,
      password: '',
      db: 10,


Use redis as your cache

When initializing your context, pass an access tokens options object with your redis parameters

const { FronteggContext } = require('@frontegg/client');

const accessTokensOptions = {
  cache: {
    type: 'redis',
    options: {
      url: 'redis[s]://[[username][:password]@][host][:port][/db-number]',



Frontegg provides various clients for seamless integration with the Frontegg API.

For example, Frontegg’s Managed Audit Logs feature allows a SaaS company to embed an end-to-end working feature in just 5 lines of code

Create a new Audits client

const { AuditsClient } = require('@frontegg/client');
const audits = new AuditsClient();

// initialize the module
await audits.init('MY-CLIENT-ID', 'MY-AUDITS-KEY');

Sending audits

await audits.sendAudit({
  tenantId: 'my-tenant-id',
  time: Date(),
  user: 'info@frontegg.com',
  resource: 'Portal',
  action: 'Login',
  severity: 'Medium',
  ip: '',

Fetching audits

const { data, total } = await audits.getAudits({
  tenantId: 'my-tenant-id',
  filter: 'any-text-filter',
  sortBy: 'my-sort-field',
  sortDirection: 'asc | desc',
  offset: 0, // Offset for starting the page
  count: 50, // Number of desired items

Entitlements Client

Initializing the client

const { EntitlementsClient } = require('@frontegg/client');

// initialize the FronteggContext

// initialize entitlements client
const client = await EntitlementsClient.init(/* */);
await client.ready();

Using the client

The client can be used to determine if authorized user or tenant is entitled to particular feature or permission.

First, we need to validate its token, using the IdentityClient:

// validate token and decode its properties
const userOrTenantEntity = await identityClient.validateToken(token, { withRolesAndPermissions: true });

Note, that some JWT tokens might not contain permissions stored in their payloads. Permissions are essential for entitlement decision-making, so remember to add option flag: withRolesAndPermissions: true.

(see Validating JWT manually section for more details).


The client can be used to verify whether an authorized user has undergone step-up authentication.

You can also require session max age to determine a stepped up user

// Validate the token and decode its properties for a stepped-up user
const steppedUpUserEntity = await identityClient.validateToken(token, { stepUp: true });

// Validate the token with session maximum age requirement (up to one hour) for a stepped-up user
const steppedUpUserEntityWithMaxAge = await identityClient.validateToken(token, { stepUp: { maxAge: 3600 } });


When the user/tenant entity is resolved, you can start querying the entitlements engine:

const userEntitlementsClient = client.forUser(userOrTenantEntity);

let result;

// asking for feature entitlement
result = await userEntitlementsClient.isEntitledToFeature('foo');
// or
result = await userEntitlementsClient.isEntitledTo({
  featureKey: 'foo'

// asking for permission entitlement
result = await userEntitlementsClient.isEntitledToPermission('foo.read');
// or
result = await userEntitlementsClient.isEntitledTo({
  permissionKey: 'foo'

The result of those queries has the following structure:

type IsEntitledResult = {
  result: boolean,
  justficiation?: string

When result: true, then justficiation is not given.

Closing the client

To gracefully close the client:


Working with the REST API

Frontegg provides a comprehensive REST API for your application. In order to use the API from your backend it is required to initialize the client and the authenticator which maintains the backend to backend session

const authenticator = new FronteggAuthenticator();
await authenticator.init('<YOUR_CLIENT_ID>', '<YOUR_API_KEY>');

// You can optionally set the base url from the HttpClient
const httpClient = new HttpClient(authenticator, { baseURL: 'https://api.frontegg.com' });

await httpClient.post(
    email: 'johndoe@acme.com',
    password: 'my-super-duper-password',
    // When providing vendor-host, it will replace(<...>) https://<api>.frontegg.com with vendor host
    'frontegg-vendor-host': 'acme.frontegg',

Validating JWT manually

If required you can implement your own middleware which will validate the Frontegg JWT using the IdentityClient

First, let's import the IdentityClient

const { IdentityClient } = require('@frontegg/client');

Then, initialize the client

const identityClient = new IdentityClient({ FRONTEGG_CLIENT_ID: 'your-client-id', FRONTEGG_API_KEY: 'your-api-key' });

And use this client to validate

app.use('/protected', (req, res, next) => {
  const token = req.headers.authorization;
  let user: IUser;
  try {
    user = identityClient.validateIdentityOnToken(token, { roles: ['admin'], permissions: ['read'] });
    req.user = user;
  } catch (e) {





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