Nylas API for Outlook.com Calendars

The Nylas Calendar API provides a simple, secure, and full-featured integration for Outlook.com 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 Outlook.com Calendars is Hard. Nylas Makes it Easy.

Eliminate the complexities of integrating Microsoft Exchange calendars directly into your app. The Nylas API removes the headaches with CalDav, CardDav, and .ics files — just plug in and go.

Bypass the Complexity of Outlook.com Protocols

With Nylas, you can build full CRUD access and bi-directional sync between your app and Outlook.com Calendars with just a few lines of code.

Unlock Every Calendar Feature

Power team-wide availability insights, enable smooth timezone updates, access round-robin booking, virtual calendars for non-human resources, and much more.

Bi-Directional Sync & Full CRUD

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

Real-Time Sync

Sync both historical and live calendar data bi-directionally in real-time with 100% accuracy.

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 you can plug into your app with ease.

Cut the Cost of Maintaining an Outlook.com Calendar Integration

Building an Outlook.com integration in-house is costly and time-consuming, with precious resources going to staffing and maintenance requirements for bespoke solutions.

  • Managing server fleets at scale
  • Onboarding and training teams to specialize in Outlook.com protocols
  • Pursuing and maintaining security certifications like GDPR and SOC 2 certification
  • Hiring additional headcount to support ongoing maintenance and bugs

With Nylas, none of these costs apply — we manage servers, specialization, security certifications, and provide world-class support SLAs.

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 create a developer account with Nylas and sync up to 10 calendars from different users for free using the Nylas Calendar API here.

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. Nylas is also 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 accounts 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.