Billions of people. Trillions of connections. One API.

The Nylas APIs power applications with email, calendar, and contacts sync from any inbox in the world.

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Built for Enterprise Products

Email, Calendar, & Contacts APIs

Only Nylas provides one API for 100% of email, calendar, and contacts integrations

email send

Sales automation

Close more deals faster with automated email workflows for your CRM

email deliverability

Data entry, retention & backup

Sync historic and live email data in your app with 100% accuracy, no copy or pasting or bcc necessary

email analytics

Personalized emails at scale

Create email cadences that are sent from your personal email, not a transactional email address

email deliverability

World-class email deliverability

Send every email with confidence that it will reach your recipient, not their SPAM folder

Email and rep analytics

Empower your sales and marketing teams with analytics like open rate, link click, and reply tracking, as well as individual rep metrics

email analytics

Increase adoption

Increase customer engagement and retention by making your CRM a hub for their most used tool: their email client

Booking & cancellation

Access any synced calendar at anytime to streamline booking and cancellation

Appointment reminders

Send automated push notifications so your clients never miss a meeting

Task scheduling

Schedule tasks, making deadline management a breeze

Productivity analytics

Analyze across-team availability and get productivity analytics

Enriched contacts

Add missing information in contact records

Smart connection graph

Make warmer intros with the help of a connection graph

Fill in data gaps

Compile data from each individuals' mailbox to create a complete and unified data source

The API Made By Developers, For Developers

Try a live example in your terminal

Try Our API
curl -X GET -u vVX4pibJbmbhPEomjX7jiXL2PeVsRQ:

Nylas Email, Calendar, and Contacts API Features

Build seamless email, calendar, and contacts integrations


One-to-many integration

The Nylas Cloud API is compatible with 100% of email, calendar, and contact providers so you only have to integrate once.

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Quick-start SDKs

Get up and running with the Nylas API in just a few minutes. Available in NodeJS, Python, and Ruby.

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Modern, RESTful API

Work with one modern API rather than a handful of outdated, archaic IMAP and SMTP protocols.

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“Nylas allowed us to add support for Office365,, Exchange, and IMAP email providers in a scalable way.”

Martin Henk

Co-founder and Head of Product at Pipedrive

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“The Nylas Contacts API is a powerful component of Dialpad, allowing our users to search and dial their contacts in real-time. With Nylas, our users' contacts sync from their address book to Dialpad seamlessly.”

Stefan Roesch

Software Engineer at Dialpad

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“I think of Nylas as Stripe for email. Before Stripe existed, you had to dig into complex APIs. When Stripe came along, they built a layer of abstraction in front of the complicated legacy APIs, and their version was straight simplicity. Nylas has done exactly that for us.”

Dan Ferranti

CTO at Wealthbox

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Connect up to 10 accounts (email, calendar, and contacts) for free today.

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