# Token endpoint in Node.js

This article presents a simple [token endpoint](../../developer-resources/security/token-endpoint.md) example for creating JSON Web Tokens (JWT) implemented in Node.js. The tokens are used by CKEditor Cloud Services to authenticate users.

<a id="dependencies">

## Dependencies

All examples use the [jsonwebtoken](https://www.npmjs.com/package/jsonwebtoken) library for creating tokens and [express](https://www.npmjs.com/package/express) to create the HTTP endpoint.

```bash
npm install express jsonwebtoken
```

<a id="examples">

## Examples

When creating a token endpoint to integrate with [Collaboration](../../guides/collaboration/quick-start.md), the token payload should contain the environment ID and user data.

<a id="real-time-collaboration-features">

### Real-time collaboration features

```javascript
const express = require( 'express' );
const jwt = require( 'jsonwebtoken' );

const accessKey = 'w1lnWEN63FPKxBNmxHN7WpfW2IoYVYca5moqIUKfWesL1Ykwv34iR5xwfWLy';
const environmentId = 'LJRQ1bju55p6a47RwadH';

const app = express();

app.use( ( req, res, next ) => {
	res.setHeader( 'Access-Control-Allow-Origin', '*' );
	res.setHeader( 'Access-Control-Allow-Methods', 'GET' );

	next();
} );

app.get( '/', ( req, res ) => {
	const payload = {
		aud: environmentId,
		sub: 'user-123',
		user: {
			email: 'joe.doe@example.com',
			name: 'Joe Doe'
		},
		auth: {
			'collaboration': {
				'*': {
					'role': 'writer'
				}
			}
		}
	};

	const result = jwt.sign( payload, accessKey, { algorithm: 'HS256', expiresIn: '24h' } );

	res.send( result );
} );

app.listen( 8080, () => console.log( 'Listening on port 8080' ) );
```

`accessKey` and `environmentId` should be replaced with the keys provided by the [Customer Portal](https://portal.ckeditor.com/) for SaaS or by the [Management Panel](../../onpremises/cs-onpremises/management.md) for the On-Premises application. User data can be taken from the session or the database. You do not need to add `iat` because `jwt.sign()` will add it by itself.

You should then pass the token to the client, for example by sending a plain string or by rendering a page that will contain this token. If the user is unauthenticated, the token endpoint should return an error or redirect to the login page. Also, you should make sure that the token is sent via an encrypted channel.

<a id="ckeditor-ai">

### CKEditor AI

When creating a token endpoint for [CKEditor AI](../../guides/ckeditor-ai/overview.md), the token payload should include AI-specific permissions in the `auth.ai.permissions` array. For a full list of available permissions, see the [Permissions guide](../../guides/ckeditor-ai/permissions.md).

```javascript
const express = require( 'express' );
const jwt = require( 'jsonwebtoken' );

const accessKey = 'w1lnWEN63FPKxBNmxHN7WpfW2IoYVYca5moqIUKfWesL1Ykwv34iR5xwfWLy';
const environmentId = 'LJRQ1bju55p6a47RwadH';

const app = express();

app.use( ( req, res, next ) => {
	res.setHeader( 'Access-Control-Allow-Origin', '*' );
	res.setHeader( 'Access-Control-Allow-Methods', 'GET' );

	next();
} );

app.get( '/', ( req, res ) => {
	const payload = {
		aud: environmentId,
		sub: 'user-123',
		user: {
			email: 'joe.doe@example.com',
			name: 'Joe Doe'
		},
		auth: {
			'ai': {
				'permissions': [
					'ai:conversations:*',
					'ai:models:agent',
					'ai:actions:system:*',
					'ai:reviews:system:*'
				]
			}
		}
	};

	const result = jwt.sign( payload, accessKey, { algorithm: 'HS256', expiresIn: '24h' } );

	res.send( result );
} );

app.listen( 8080, () => console.log( 'Listening on port 8080' ) );
```

If you use both collaboration and AI, combine both `auth.collaboration` and `auth.ai` in a single token payload.

<a id="easy-image-export-to-pdf-and-import-and-export-to-word">

### Easy Image, Export to PDF and Import and Export to Word

The token endpoint for Easy Image and the Export to Word/PDF features does not require adding user data. You can therefore skip the `user` and `auth` properties in the token payload.

<a id="export-to-pdf-and-import-and-export-to-word-on-premises">

### Export to PDF and Import and Export to Word On-Premises

Tokens for PDF Converter and DOCX Converter On-Premises do not require any additional claims, so you can create the token with an empty payload.

In this implementation, `accessKey` has been replaced by `SECRET_KEY` - a variable set during the [Import and Export to Word](../../onpremises/docx-onpremises/installation.md)/[Export to PDF](../../onpremises/pdf-onpremises/installation.md) On-Premises instance installation.

```javascript
const express = require( 'express' );
const jwt = require( 'jsonwebtoken' );

const SECRET_KEY = 'w1lnWEN63FPKxBNmxHN7WpfW2IoYVYca5moqIUKfWesL1Ykwv34iR5xwfWLy';

const app = express();

app.use( ( req, res, next ) => {
	res.setHeader( 'Access-Control-Allow-Origin', '*' );
	res.setHeader( 'Access-Control-Allow-Methods', 'GET' );

	next();
} );

app.get( '/', ( req, res ) => {
	const result = jwt.sign( {}, SECRET_KEY, { algorithm: 'HS256' } );

	res.send( result );
} );

app.listen( 8080, () => console.log( 'Listening on port 8080' ) );
```

If you create your own token endpoint, do not forget to authenticate the user before you send the token. You can use [Passport](http://www.passportjs.org) for this.

<a id="usage">

## Usage

Start the server by running:

```bash
node server
```

Now you can get the token with a simple request:

```
http://localhost:8080/
```

<a id="example-response">

## Example response

The result should be in a plain text format.

```
eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJhdWQiOiJMSlJRMWJqdTU1cDZhNDdSd2FkSCIsImlhdCI6MTY0OTIyOTQyMiwic3ViIjoidXNlci0xMjMiLCJ1c2VyIjp7ImVtYWlsIjoiam9lLmRvZUBleGFtcGxlLmNvbSIsIm5hbWUiOiJKb2UgRG9lIn0sImF1dGgiOnsiY29sbGFib3JhdGlvbiI6eyIqIjp7InJvbGUiOiJ3cml0ZXIifX19fQ._V-HXKKHU1E-saZxk4JTvgXdh1I7793nCEK91ubSZHY
```

<a id="debugging">

## Debugging

For debugging purposes, [jwt.io](https://jwt.io) can be used.

---

Full index of the Cloud Services documentation: [llms.txt](../../../llms.txt)