One Contacts API. Every Provider.

Connect your application to any contacts provider in minutes. Supports Google Contacts, Exchange Contacts, Office 365 contacts, iCloud, and more.


Sync Every Contact With Your Application

The Nylas Universal Contacts API powers your application with a secure, reliable connection to your user’s contacts. Contact details update in real-time, so your users always have the most recent, accurate data.

Get bi-directional contacts sync and full CRUD (create, read, update, delete) capabilities from Google Contacts, Microsoft Exchange Contacts, iCloud, contacts and the rest with just a few lines of code.


Integrate Your User’s Contacts Data

One Modern, RESTful API

Integrate contacts into your app via a secure connection.

Real-Time, Bi-Directional Contacts Sync

Sync historic and new contacts into your application in real-time.

Auto-Complete Contacts Data

Update contacts from anywhere and sync data automatically.

Create, Read, Update, and Delete Any Contacts Event

Full CRUD capabilities in your application for every contact.

Lightweight and Easy-to-Use

Support every contacts provider via a single API.

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Thinking About Building Your Own Integration?

Calculate your savings with Nylas.


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Connect Securely to Your User’s Contacts

Security is our #1 priority — but don’t just take our word for it. Nylas is SOC 2 Certified, Privacy Shield certified, GDPR compliant, and HIPAA and FINRA ready. Data for every contact you sync is encrypted and isolated with multi-level permission checks.

We give you full control over what data is accessed so your customer’s data is always secure, and your product is always compliant.

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  • World-Class Security Certifications
  • Token Management
  • Whitelisted IPs
  • Data Encryption
  • Granular Authentication Scopes
  • Gated Permission Checks
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A Powerful and Reliable Contacts API

The Nylas Contacts API is easy to use and even easier to support. We handle ongoing maintenance for any provider updates so you can focus on other things. Just set it and forget it.

Updates to our Contacts API don’t introduce breaking changes and all customers get a 99.9% guaranteed uptime along with industry-leading support SLAs.

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How It Works


Ready to Start Building?


How do I get started with the Nylas Contacts API?

You can create an account and get a free API key here. Sync up to 10 accounts from different users for free in the first 30 days using the Nylas Contacts API.

Where do I access the Nylas Contacts API key?

You can access the Contacts API key directly from your Nylas account. One key unlocks access to any contacts provider in the world! Exciting, we know.

How do my users authenticate contacts sync with my app?

Nylas offers native authentication and hosted authentication enable contacts sync. Your users will input their credentials and then be redirected back to your application.

What kinds of companies use the Nylas Contacts API?

Thousands of developers across more than 30 countries and hundreds of industries use the Nylas Contacts API. Learn how CRM, ATS, automotive, finance, legal apps, and more use Nylas API on our case studies page.

What languages can I use to integrate with the Nylas Contacts API?

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

How is the Contacts API secured?

The Nylas Contacts API encrypts your data with enterprise-grade security standards. In addition, Nylas is GDPR compliant, SOC 2 certified, Privacy Shield Certified, and HIPAA and FINRA ready.

What are the pricing options for the Nylas Contacts API?

You can sync up to 10 of your user’s contacts for free for 30 days. For full licenses, pricing is based on a variety of factors, starting with the number of accounts you have synced to your application. View our pricing page for more details.

Additional questions about building contacts sync?

Check out our comprehensive Getting Started guide.