Kinde’s NodeJS SDK helps developers integrate a new or an existing NodeJS application to the Kinde platform.

You can view the NodeJS docs and NodeJS starter kit in GitHub.

• Node version 18.x.x or newer.
• If you haven’t got a Kinde account, register for free here (no credit card required). Registering gives you a Kinde domain, which you need to get started, e.g. yourapp.kinde.com.

Install the SDK using npm or yarn

npm i @kinde-oss/kinde-nodejs-sdk --save

1. In Kinde, go to Settings > Applications > [Your app] > View details.

2. Add your callback URLs in the relevant fields. For example:

   • Allowed callback URLs (also known as redirect URIs): https://<your_app_domain>/callback e.g: http://localhost:3000/callback

   • Allowed logout redirect URLs:

     https://<your_app_domain> e.g:http://localhost:3000

3. Select Save.

Kinde comes with a production environment, but you can set up other environments if you want to. Each environment has a unique subdomain so be sure to use the correct one in the Configure your app section which follows.

Environment variables

Put these variables in your .env file. You can find these variables on your Settings > Applications > [Your app] > View details page.

• KINDE_DOMAIN - your Kinde domain
• KINDE_CLIENT_ID - your Kinde client ID
• KINDE_CLIENT_SECRET - your Kinde client secret
• KINDE_REDIRECT_URL - your callback url to redirect to after authentication. Make sure this URL is under your Allowed callback URLs.
• KINDE_POST_LOGOUT_REDIRECT_URL - where you want users to be redirected to after logging out. Make sure this URL is under your Allowed logout redirect URLs.

Below is an example of a .env file

KINDE_DOMAIN=https://<your_kinde_subdomain>.kinde.com
KINDE_CLIENT_ID=<your_kinde_client_id>
KINDE_CLIENT_SECRET=<your_kinde_client_secret>
KINDE_REDIRECT_URI=http://localhost:3000/callback
KINDE_LOGOUT_REDIRECT_URI=http://localhost:3000

Create a new KindeClient instance before you initialize your app.

require("dotenv").config();

const {KindeClient, GrantType} = require("@kinde-oss/kinde-nodejs-sdk");

const options = {
    domain: process.env.KINDE_DOMAIN,
    clientId: process.env.KINDE_CLIENT_ID,
    clientSecret: process.env.KINDE_CLIENT_SECRET,
    redirectUri: process.env.KINDE_REDIRECT_URI,
    logoutRedirectUri: process.env.KINDE_LOGOUT_REDIRECT_URI,
    grantType: GrantType.PKCE
};

const kindeClient = new KindeClient(options);

To incorporate the login and register features, you’ll have to create routes for /login and /register. Additionally, you should implement the login/register methods in the middleware.

app.get("/login", kindeClient.login(), (req, res) => {
    return res.redirect("/");
});

app.get("/register", kindeClient.register(), (req, res) => {
    return res.redirect("/");
});

Add links in your HTML as follows:

<a href="/login">Sign in</a> <a href="/register">Sign up</a>

You will also need to route /callback. When the user is redirected back to your site from Kinde, it will trigger a call to the callback URL defined in the variable KINDE_REDIRECT_URL.

app.get("/callback", kindeClient.callback(), (req, res) => {
    return res.redirect("/");
});

The Kinde SDK comes with a logout method.

app.get("/logout", client.logout());

Add links in your HTML as follows:

<a href="/logout">Log out</a>

We’ve provided a helper to get a boolean value to check if a user is signed in. This verifies that the access token is still valid.

const isAuthenticated = await kindeClient.isAuthenticated(req); // Boolean: true or false

if (isAuthenticated) {
    // Need to implement, e.g: call an api, etc...
} else {
    // Need to implement, e.g: redirect user to sign in, etc..
}

You need to have already authenticated before you call the API, otherwise an error will occur.

To access the user information, use the getUserDetails helper function:

kindeClient.getUserDetails(req);
// returns
{
	"given_name":"Dave",
	"id":"kp_12345678910",
	"family_name":"Smith",
	"email":"dave@smith.com",
	"picture": "https://link_to_avatar_url.kinde.com"
}

If you navigate to the “Users” page within Kinde you will see your newly registered user there.

An audience is the intended recipient of an access token - for example the API for your application. The audience argument can be passed to the Kinde client to request an audience be added to the provided token.

The audience of a token is the intended recipient of the token.

const options = {
  ...
	// rest options
	...,
  audience: 'api.yourapp.com',
};

const kindeClient = new KindeClient(options);

For details on how to connect, see Register an API

By default the KindeSDK requests the following scopes:

• profile
• email
• offline
• openid

You can override this by passing scopes into the KindeSDK.

const options = {
  ...
	// rest options
	...,
  scope: 'openid profile email offline',
};

const kindeClient = new KindeClient(options);

To have a new organization created within your application, you will need to set up the following route

...
app.get('/createOrg', kindeClient.createOrg(), (req, res) => {
  // do something in next step
  return res.redirect('/');
});
...

You can also pass org_name as part of the query string as per the following HTML:

<a href="/createOrg?org_name=<your_org_name>">Create Org</a>

The Kinde client provides methods for you easily sign up and sign in users into organizations. You can add links in your HTML as follows:

<a href="/login?org_code=<your_org_code>">Sign into an org</a>
<a href="/register?org_code=<your_org_code>">Sign up to an org</a>

Following authentication, Kinde provides a json web token (jwt) to your application. Along with the standard information we also include the org_code and the permissions for that organization (this is important as a user can belong to multiple organizations and have different permissions for each).

Example of a returned token:

{
    "aud": [],
    "exp": 1658475930,
    "iat": 1658472329,
    "iss": "https://your_subdomain.kinde.com",
    "jti": "123457890",
    "org_code": "org_1234",
    "permissions": ["read:todos", "create:todos"],
    "scp": ["openid", "profile", "email", "offline"],
    "sub": "kp:123457890"
}

The id_token will also contain an array of organizations that a user belongs to - this is useful if you wanted to build out an organization switcher for example.

[
		...
		"org_codes": ["org_1234", "org_4567"]
		...
];

There are two helper functions you can use to extract information:

kindeClient.getOrganization(req);
// { orgCode: 'org_1234' }

kindeClient.getUserOrganizations(req);
// { orgCodes: ['org_1234', 'org_abcd'] }

For more information about how organizations work in Kinde, see Kinde organizations for developers.

Once a user has been verified, your product/application will return the JWT token with an array of permissions for that user. You will need to configure your product/application to read permissions and unlock the respective functions.

Set permissions in your Kinde account. Here’s an example set of permissions.

const permissions = [
    "create:todos",
    "update:todos",
    "read:todos",
    "delete:todos",
    "create:tasks",
    "update:tasks",
    "read:tasks",
    "delete:tasks"
];

We provide helper functions to more easily access the permissions claim:

kindeClient.getPermission(req, "create:todos");
// { orgCode: 'org_1234', isGranted: true }

kindeClient.getPermissions(req);
// { orgCode: 'org_1234', permissions: ['create:todos', 'update:todos', 'read:todos'] }

A practical example in code might look something like:

if (kindeClient.getPermission(req, "create:todos")["isGranted"]) {
    // create new a todo
}

We have provided a helper to grab any claim from your id or access tokens. The helper defaults to access tokens:

kindeClient.getClaim(req, "aud");
// ['api.yourapp.com']

kindeClient.getClaim(req, "given_name", "id_token");
// 'David'

We have provided a helper to grab any feature flag from access_token:

/**
 * Get a flag from the feature_flags claim of the access_token.
 * @param {Object} request - Request object
 * @param {String} code - The name of the flag.
 * @param {Object} [defaultValue] - A fallback value if the flag isn't found.
 * @param {'s'|'b'|'i'|undefined} [flagType] - The data type of the flag (integer / boolean / string).
 * @return {Object} Flag details.
 */
kindeClient.getFlag(req, code, {defaultValue}, flagType);

/* Example usage */

kindeClient.getFlag(req, "theme");
/*{
//   "code": "theme",
//   "type": "string",
//   "value": "pink",
//   "is_default": false // whether the fallback value had to be used
}*/

kindeClient.getFlag(req, "create_competition", {defaultValue: false});
/*{
      "code": "create_competition",
      "value": false,
      "is_default": true // because fallback value had to be used
}*/

We also require wrapper functions by type which should leverage getFlag above.

/**
 * Get a boolean flag from the feature_flags claim of the access_token.
 * @param {Object} request - Request object
 * @param {String} code - The name of the flag.
 * @param {Boolean} [defaultValue] - A fallback value if the flag isn't found.
 * @return {Boolean}
 */
kindeClient.getBooleanFlag(req, code, defaultValue);

/* Example usage */
kindeClient.getBooleanFlag(req, "is_dark_mode");
// true

kindeClient.getBooleanFlag(req, "is_dark_mode", false);
// true

kindeClient.getBooleanFlag(req, "new_feature");
// Error - flag does not exist and no default provided

kindeClient.getBooleanFlag(req, "new_feature", false);
// false (flag does not exist so falls back to default)

kindeClient.getBooleanFlag(req, "theme", "blue");
// Error - Flag "theme" is of type string not boolean

/**
 * Get a string flag from the feature_flags claim of the access_token.
 * @param {Object} request - Request object
 * @param {String} code - The name of the flag.
 * @param {String} [defaultValue] - A fallback value if the flag isn't found.
 * @return {String}
 */
kindeClient.getStringFlag(req, code, defaultValue);

/* Example usage */
kindeClient.getStringFlag(req, "theme");
// pink

kindeClient.getStringFlag(req, "theme", "black");
// true

kindeClient.getStringFlag(req, "cta_color");
// Error - flag does not exist and no default provided

kindeClient.getStringFlag(req, "cta_color", "blue");
// blue (flag does not exist so falls back to default)

kindeClient.getStringFlag(req, "is_dark_mode", false);
// Error - Flag "is_dark_mode" is of type boolean not string

/**
 * Get an integer flag from the feature_flags claim of the access_token.
 * @param {Object} request - Request object
 * @param {String} code - The name of the flag.
 * @param {Integer} [defaultValue] - A fallback value if the flag isn't found.
 * @return {Integer}
 */
kindeClient.getIntegerFlag(req, code, defaultValue);

/* Example usage */
kindeClient.getIntegerFlag(req, "competitions_limit");
// 5

kindeClient.getIntegerFlag(req, "competitions_limit", 3);
// 5

kinde_client.getIntegerFlag("team_count");
// Error - flag does not exist and no default provided

kindeClient.getIntegerFlag(req, "team_count", 2);
// false (flag does not exist so falls back to default)

kindeClient.getIntegerFlag(req, "is_dark_mode", false);
// Error - Flag "is_dark_mode" is of type boolean not integer

After the user has successfully logged in, you will have a JSON Web Token (JWT) and a refresh token securely stored. You can retrieve an access token by utilizing the getToken method.

const access_token = await kindeClient.getToken(req);
console.log("access_token", accessToken);

The sections below relate to how to call the Kinde Management API. You need to add a machine to machine application and get an access token to connect:

const {KindeClient, ApiClient, OAuthApi} = require("@kinde-oss/kinde-nodejs-sdk");

// Get Access Token
const access_token = await kindeClient.getToken(req);

const apiClient = new ApiClient("https://your_kinde_domain.com");

// Set access token in the headers request
apiClient.authentications.kindeBearerAuth.accessToken = access_token;

const apiInstance = new OAuthApi(apiClient);
apiInstance.getUserProfileV2((error, data) => {
    if (error) {
        console.error(error);
    } else {
        console.log("API called successfully. Returned data: " + JSON.stringify(data, null, 2));
    }
});

// Another case with get users of your origization.
const {
    KindeClient,
    ApiClient,
    UsersApi,
    CreateUserRequest
} = require("@kinde-oss/kinde-nodejs-sdk");

const options = {
    domain: process.env.KINDE_DOMAIN,
    clientId: process.env.KINDE_CLIENT_ID,
    clientSecret: process.env.KINDE_CLIENT_SECRET,
    redirectUri: process.env.KINDE_REDIRECT_URI,
    logoutRedirectUri: process.env.KINDE_LOGOUT_REDIRECT_URI || "",
    grantType: GrantType.CLIENT_CREDENTIALS,
    audience: "https://your_kinde_domain.kinde.com/api",
    scope: ""
};
const kindeClient = new KindeClient(options);

const access_token = await kindeClient.getToken(req);

const apiClient = new ApiClient(process.env.KINDE_DOMAIN);

// Set access token in the headers request
apiClient.authentications.kindeBearerAuth.accessToken = access_token;

const apiInstance = new UsersApi(apiClient);
const opts = {
    pageSize: 5
};
apiInstance.getUsers(opts, (error, data) => {
    if (error) {
        console.error(error);
    } else {
        console.log("API called successfully. Returned data: " + JSON.stringify(data, null, 2));
    }
});

The documentation details can be found at: https://github.com/kinde-oss/kinde-nodejs-sdk/tree/main/docs

Either your Kinde instance url or your custom domain. e.g. https://yourapp.kinde.com

Type: string

Required: Yes

The unique ID of your application in Kinde.

Type: string

Required: Yes

A unique secret code/key of your application in Kinde.

Type: string

Required: Yes

The URL that the user will be returned to after authentication.

Type: string

Required: Yes

Where your user will be redirected to when they sign out.

Type: string

Required: Yes

Define the grant type when using the SDK.

Type: string

Required: Yes

The audience claim for the JWT.

Type: string

Required: No

The scopes to be requested from Kinde: openid profile email offline.

Type: string

Required: No

Constructs a redirect URL and sends the user to Kinde to sign in.

Usage:

kindeClient.login();

Constructs a redirect URL and sends the user to Kinde to sign up.

Usage:

kindeClient.register();

Logs the user out of Kinde.

Usage:

kindeClient.logout();

Callback middleware function for Kinde OAuth 2.0 flow.

Usage:

kindeClient.callback();

Check if the user is authenticated.

Arguments:

request - object (Request object)

Usage:

await kindeClient.isAuthenticated(req);

Output: true or false

Constructs redirect url and sends user to Kinde to sign up and create a new org for your business.

Arguments:

org_name?: string

Usage:

kindeClient.createOrg();

Gets a claim from an access or ID token.

Arguments:

request - object (Request object), claim: string, tokenKey?: string

Usage:

kindeClient.getClaim(req, "given_name", "id_token");

Output: 'David'

Returns the state of a given permission.

Arguments: key: string

Usage:

kindeClient.getPermission(req, "read:todos");

Output sample:

{
	orgCode : 'org_1234', isGranted : true
}

Returns all permissions for the current user for the organization they are logged into.

Arguments:

request - object (Request object)

Usage:

kindeClient.getPermissions(req);

Sample output:

{
	orgCode : 'org_1234',
	permissions : ['create:todos', 'update:todos', 'read:todos']
}

Get details for the organization your user is logged into.

Arguments:

request - object (Request object)

Usage:

kindeClient.getOrganization(req);

Sample output:

{
    orgCode: "org_1234";
}

Returns the profile for the current user.

Arguments:

request - object (Request object)

Usage:

kindeClient.getUserDetails(req);

Sample output:

{
	given_name: 'Dave',
	id: 'abcdef',
	family_name : 'Smith',
	email : 'mailto:dave@smith.com'
}

Gets an array of all organizations the user has access to.

Arguments:

request - object (Request object)

Usage:

kindeClient.getUserOrganizations(req);

Sample output:

{
    orgCodes: ["org_7052552de68", "org_5a5c29381327"];
}

Get a flag from the feature_flags claim of the access_token.

Arguments:

request - object (Request object) code - string, defaultValue - object, flagType - string

Usage:

kindeClient.getFlag(req, "theme");

Sample output:

{
	"code": "theme",
	"type": "string",
	"value": "pink",
	"is_default": false
}

Get a boolean flag from the feature_flags claim of the access token.

Arguments:

request - object (Request object) code - string, defaultValue - object,

Usage:

kindeClient.getBooleanFlag(req, "is_dark_mode");

Sample output: true

Get a string flag from the feature_flags claim of the access token.

Arguments:

request - object (Request object) code - string, defaultValue - object,

Usage:

kindeClient.getStringFlag(req, "theme");

Sample output: pink

Get an integer flag from the feature_flags claim of the access token.

Arguments:

request - object (Request object) code - string, defaultValue - object,

Usage:

kindeClient.getIntegerFlag(req, "team_count");

Sample output: 2

If you need help connecting to Kinde, please contact us at support@kinde.com.