The Secure API for Integrating With Outlook Mail

The Nylas APIs power the world’s leading software applications with essential features and sync from Outlook and 100% of email service providers.

  • Node
  • Java
  • Python
  • Ruby
import Nylas from 'nylas';
   clientId: CLIENT_ID,
   clientSecret: CLIENT_SECRET,
const nylas = Nylas.with(ACCESS_TOKEN);
nylas.account.get().then(account => {
    `Email: ${account.emailAddress} | `,
    `Provider: ${account.provider}  `


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


from nylas import APIClient
client = APIClient(
# .first() returns the most recent email
message = nylas.messages.first()
print("Subject: {} | from: {}".format(
    message.subject, message.from_


require 'nylas'
nylas =
   client_id: CLIENT_ID,
   client_secret: CLIENT_SECRET,
   access_token: ACCESS_TOKEN
an_email = nylas.messages.first
puts an_email


Integrating With the Outlook Mail API is Hard. Nylas Makes it Easy.

The Nylas Email API gives you a secure, reliable connection to your users’ Outlook accounts, as well as every other email service provider. With Nylas, you can sync historic and live email data into your application in real-time and get bi-directional email sync with full CRUD (create, read, update, delete).

Integrate With the Outlook Mail REST API Faster With Nylas

To build Outlook mail sync yourself would take around 1,928 hours. With Nylas, it takes just a few hours.

Full Search Functionality

Nylas provides search functionality that allows you to run full-text search that is proxied to the users’ Outlook accounts. Results are matched with objects that have been synced, and then returned.

Webhook Notifications

Nylas provides search functionality that allows you to run full-text search that is proxied to the users’ Outlook accounts. Results are matched with objects that have been synced, and then returned.

99.9% Guaranteed Uptime

Uptime is of utmost importance. That’s why the Nylas communication platform is built with a 99.9% guaranteed uptime.

Divert the Costs of the Outlook Mail API

As your platform scales and your user base grows, so do costs for directly maintaining the Outlook integration. Nylas handles these for you, including costs for:

  • Operating servers
  • Removing Microsoft’s old protocols and implementing new ones
  • Keeping up with the hundreds of pages of documentation for Exchange ActiveSync (EAS), Exchange Web Services (EWS) and Graph
  • Troubleshooting bugs

The Nylas APIs abstracts away the ongoing maintenance tasks for you. Our API comes with out-of-the-box security certifications, and we power even more granular scopes than most providers to improve security for your end-users.

Calculate Your Savings With the Nylas APIs »

With Nylas, Everything is Secure. Everything is Connected.

Security is our top priority — we sweat the small stuff so you don’t have to. Nylas is SOC 2 Certified, Privacy Shield certified, GDPR compliant, and HIPAA and FINRA ready. Data from every email you sync is encrypted and isolated with multi-level permission checks.
Learn More
  • World-Class Security Certifications
  • Token Management
  • Whitelisted IPs
  • Data Encryption
  • Granular Authentication Scopes
  • Gated Permission Checks
Learn More


How do I know how much time and money I’m saving with the Nylas API?

You can calculate exactly how much time and money you can save with our savings calculator.

How do I get started integrating with the Outlook API?

You can create a developer account with Nylas and sync up to 10 accounts for free here.

Where do I get the access key that allows me to begin integrating with the Outlook API?

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

How do my users activate email sync?

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

What kinds of companies use the Nylas API to integrate with the Outlook API?

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

What languages can I use to integrate with the Outlook API?

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

How is the Nylas API integration with the Outlook API secured?

The Nylas Email 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 integrating with the Outlook 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 email integration?

Check out our comprehensive Getting Started Guide.

Can I integrate Outlook Calendar and contacts as well?

Once your account authenticates with Nylas and our sync server detects the account, we will automatically start syncing mail, calendar, and contact data if you passed in the calendar and contact scopes when authenticating.