microsoft

Microsoft Entra ID Emulator

Microsoft Entra ID (Azure AD) v2.0 OAuth 2.0 and OpenID Connect emulation with authorization code flow, PKCE, client credentials, RS256 ID tokens, OIDC discovery, and a Microsoft Graph /v1.0/me endpoint.

Start

Local listeners bind to 127.0.0.1 by default. For access from containers or other machines, pass --host 0.0.0.0 to the CLI or hostname: '0.0.0.0' to createEmulator. Configure --base-url or baseUrl for advertised URLs reachable by those clients.

# Microsoft only
npx emulate --service microsoft

# Default port (when run alone)
# http://localhost:4000

Or programmatically:

import { createEmulator } from 'emulate'

const microsoft = await createEmulator({ service: 'microsoft', port: 4005 })
// microsoft.url === 'http://localhost:4005'

Pointing Your App at the Emulator

Environment Variable

MICROSOFT_EMULATOR_URL=http://localhost:4005

OAuth URL Mapping

Auth.js / NextAuth.js

import MicrosoftEntraId from '@auth/core/providers/microsoft-entra-id'

MicrosoftEntraId({
  clientId: process.env.MICROSOFT_CLIENT_ID,
  clientSecret: process.env.MICROSOFT_CLIENT_SECRET,
  authorization: {
    url: `${process.env.MICROSOFT_EMULATOR_URL}/oauth2/v2.0/authorize`,
    params: { scope: 'openid email profile User.Read' },
  },
  token: {
    url: `${process.env.MICROSOFT_EMULATOR_URL}/oauth2/v2.0/token`,
  },
  userinfo: {
    url: `${process.env.MICROSOFT_EMULATOR_URL}/oidc/userinfo`,
  },
  issuer: process.env.MICROSOFT_EMULATOR_URL,
})