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    Microsoft Authentication Library for Node (msal-node)

    npm version npm version codecov

    Getting Started AAD Docs Library Reference
    1. About
    2. FAQ
    3. Changelog
    4. Prerequisites
    5. Installation
    6. Node Version Support
    7. Usage
    8. Samples
    9. Build Library
    10. Security Reporting
    11. License
    12. Code of Conduct


    MSAL Node enables applications to authenticate users using Azure AD work and school accounts (AAD), Microsoft personal accounts (MSA) and social identity providers like Facebook, Google, LinkedIn, Microsoft accounts, etc. through Azure AD B2C service. It also enables your app to get tokens to access Microsoft Cloud services such as Microsoft Graph.

    OAuth2.0 grant types supported:

    The current version supports the following ways of acquiring tokens:

    Public Client:

    Confidential Client:

    [Coming Soon] In the future we plan to add support for:

    More details on different grant types supported by Microsoft authentication libraries in general can be found here.

    Scenarios supported:

    The scenarios supported with this library are:

    • Desktop app that calls web APIs
    • Web app that calls web APIs
    • Web APIs that call web APIs
    • Daemon apps

    More details on scenarios and the authentication flows that map to each of them can be found here.


    See here.


    Before using @azure/msal-node you will need to register your app in the azure portal:


    Via NPM:

    npm install @azure/msal-node

    Node Version Support

    MSAL Node will follow the Long Term Support (LTS) schedule of the Node.js project. Our support plan is as follows.

    Any major MSAL Node release:

    • Will support stable (even-numbered) Maintenance LTS, Active LTS, and Current versions of Node
    • Will drop support for any previously supported Node versions that have reached end of life
    • Will not support prerelease/preview/pending versions until they are stable
    MSAL Node version MSAL support status Supported Node versions
    1.x.x Active development 10, 12, 14, 16, 18


    MSAL basics


    There are multiple samples included in the repository that use MSAL Node to acquire tokens. These samples are currently used for manual testing, and are not meant to be a reference of best practices, therefore use judgement and do not blindly copy this code to any production applications.

    AAD samples:

    • auth-code: Express app using OAuth2.0 authorization code flow.
    • auth-code-pkce: Express app using OAuth2.0 authorization code flow with PKCE.
    • device-code: Command line app using OAuth 2.0 device code flow.
    • refresh-token: Command line app using OAuth 2.0 refresh flow.
    • silent-flow: Express app using OAuth2.0 authorization code flow to acquire a token and store in the token cache, and silent flow to use tokens in the token cache.
    • client-credentials: Daemon app using OAuth 2.0 client credential grant to acquire a token.
    • on-behalf-of: Web application using OAuth 2.0 auth code flow to acquire a token for a web API. The web API validates the token, and calls Microsoft Graph on behalf of the user who authenticated in the web application.
    • username-password: Web application using OAuth 2.0 resource owner password credentials (ROPC) flow to acquire a token for a web API.
    • ElectronTestApp: Electron desktop application using OAuth 2.0 auth code with PKCE flow to acquire a token for a web API such as Microsoft Graph.
    • ExpressTestApp: Express.js MVC web application using OAuth 2.0 auth code with PKCE flow to acquire a token for a web API such as Microsoft Graph.
    • Hybrid Spa Sample: Sample demonstrating how to use enableSpaAuthorizationCode to perform SSO for applications that leverage server-side and client-side authentication using MSAL Browser and MSAL Node.

    B2C samples:


    Build and Test

    • If you don't have lerna installed, run npm install -g lerna
    • Run lerna bootstrap from anywhere within microsoft-authentication-library-for-js.git.
    • Navigate to microsoft-authentication-library-for-js/lib/msal-common and run npm run build
    • Navigate to microsoft-authentication-library-for-js/lib/msal-node and run npm run build
    // to link msal-node and msal-common packages
    lerna bootstrap
    // Change to the msal-node package directory
    cd lib/msal-common/
    // To run build only for node package
    npm run build
    // Change to the msal-node package directory
    cd lib/msal-node/
    // To run build only for node package
    npm run build

    Local Development

    Below is a list of commands you will probably find useful:

    npm run build:modules:watch

    Runs the project in development/watch mode. Your project will be rebuilt upon changes. TSDX has a special logger for you convenience. Error messages are pretty printed and formatted for compatibility VS Code's Problems tab. The library will be rebuilt if you make edits.

    npm run build

    Bundles the package to the dist folder. The package is optimized and bundled with Rollup into multiple formats (CommonJS, UMD, and ES Module).

    lerna bootstrap

    If you are running the project in development/watch mode, or have made changes in msal-common and need them reflecting across the project, please run lerna bootstrap to link all the symbols. Please note that npm install will unlink all the code, hence it is advised to run lerna bootstrap post installation.

    npm run lint

    Runs eslint with Prettier

    npm test, npm run test:coverage, npm run test:watch

    Runs the test watcher (Jest) in an interactive mode. By default, runs tests related to files changed since the last commit. Generate code coverage by adding the flag --coverage. No additional setup needed. Jest can collect code coverage information from entire projects, including untested files.

    Security Reporting

    If you find a security issue with our libraries or services please report it to with as much detail as possible. Your submission may be eligible for a bounty through the Microsoft Bounty program. Please do not post security issues to GitHub Issues or any other public site. We will contact you shortly upon receiving the information. We encourage you to get notifications of when security incidents occur by visiting this page and subscribing to Security Advisory Alerts.


    Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT License.

    We Value and Adhere to the Microsoft Open Source Code of Conduct

    This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact with any additional questions or comments.


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    • azuread
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