Nylas API for Microsoft Exchange Calendars

The Nylas Universal Calendar API is a full-featured integration that quickly and easily syncs your app with Microsoft Exchange Calendars.

  • Node
  • Java
  • Python
  • Ruby
import Nylas from 'nylas';
    clientId: CLIENT_ID,
    clientSecret: CLIENT_SECRET,
var nylas =  
    .then(count => {
            `You have ${count} events.`


public class Calendar { 
  public static void main (String[] args) throws Exception {
    NylasAccount account = new NylasClient().account(ACCESS_TOKEN);
    List events = account.events().list(
      new EventQuery().title("Birthday Party!"));
    events.stream().forEach(( Event event ) -> {
      System.out.println( event.getLocation() ); 


from nylas import APIClient
nylas = APIClient(
events = nylas.events.where(
for event in events:


require 'nylas'
nylas = Nylas::API.new(
    app_id: CLIENT_ID,
    app_secret: CLIENT_SECRET,
    access_token: ACCESS_TOKEN
events = 
events.each do |events|
    puts events.title


Integrating With the Microsoft Exchange Calendar API is Hard. Nylas Makes it Easy.

We built the Nylas Calendar API to provide a simpler way to integrate with 100% of calendar providers: Google Calendar, Microsoft Exchange Calendar, Outlook.com Calendars, Yahoo! Mail, and the rest.

Nylas handle the headaches of .ics files and iCal for you so your team can focus on building the features they love.

Avoid the Complexity of Exchange Protocols

Build fully functional, bi-directionally syncing connections between your app and Exchange Calendars with just a few lines of code.

Bypass Integration Complications

Circumvent working with proprietary protocols. Nylas handles the complexities of EWS, EAS, and binary XML for you.

Bi-Directional Sync & Full CRUD

Sync data bi-directionally between Exchange Calendars and your app, and give users full CRUD (create, read, update, and delete) access natively within your application.

Webhooks Notifications

Receive in-app notifications when certain events occur — webhooks are easy to integrate and scale seamlessly as your business grows.

Connect With Just Four Lines of Code

Integrate Exchange Calendar data with ease. The Nylas API simplifies Exchange’s archaic SOAP API documentation into a simple, parsed packet that plugs right into your app.

Reduce Costs and Increase Efficiency

Building a Microsoft Exchange Calendar integration in-house is costly and time-consuming, and the support overhead only increases over time.

  • Operating servers at scale
  • Time spent specializing in EWS, EAS, or Graph
  • Onboarding and training teams to manage the integration
  • Support costs
  • Debugging server-specific issues

Calculate Your Savings With the Nylas APIs »

Everything is Secure. Everything is Connected.

Nylas is SOC 2 Certified, Privacy Shield certified, GDPR compliant, and HIPAA | HITECH, and FINRA ready. Data from every calendar you sync is encrypted and isolated with multi-level permission checks.

Learn How
  • World-Class Security Certifications
  • Token Management
  • Whitelisted IPs
  • Data Encryption
  • Granular Authentication Scopes
  • Gated Permission Checks
Learn How


How do I get started with the Nylas Calendar API?

You can access the Calendar API key directly from your Nylas dashboard. One key unlocks access to any calendar provider in the world! Exciting, we know.

Where do I access the Nylas Calendar API key?

You can access the Calendar API key directly from your Nylas dashboard. One key unlocks access to any calendar provider in the world! Exciting, we know.

How do my users activate calendar sync?

Your users can kick-start full calendar sync simply by authenticating access. Your users will input their credentials and then be redirected back to your application.

What kinds of companies use the Nylas Calendar API?

Learn how customers in the CRM, ATS, automotive, finance, and legal industries use the Nylas Calendar API on our case studies page.

What languages can I use to connect to the Nylas Calendar API?

We provide SDKs that make it easy to integrate your app using Python, Node.js, Java, or Ruby, or you can use a different language of choice to connect to our RESTful API.

How is the Calendar API secured?

The Nylas Calendar API encrypts 100% of your data with military-grade security standards. In addition, Nylas is GDPR compliant, SOC 2 compliant, and HIPAA and FINRA ready.

What are the pricing options for the Nylas Calendar API?

You can sync up to 10 user’s calendars for free. After that, pricing is based on the number of accounts you have synced; you can view our pricing page for more details.

Additional questions about building your calendar integration?

Check out our comprehensive Getting Started Guide.