Calendar API to Sync, Create & Manage Events in Your App

With our Calendar API, seamlessly integrate Google Calendar and Outlook Calendar into your application. Enable 2-way sync, event management, and scheduling features for your users.

Your App

January 28, 2026

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

📅 Team Standup

9:00 - 9:30 AM • Google Meet

📧 Client Review

10:30 - 11:15 AM

💼 Strategy Meeting

12:00 - 1:00 PM • Teams

🎯 Product Demo

2:00 - 2:45 PM

Supported:

Build Now Documentation

7-Day Free Trial

Google Calendar Event synced 2-way sync

Outlook Calendar Meeting created Real-time

Your App

January 28, 2026

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

📅 Team Standup

9:00 - 9:30 AM • Google Meet

📧 Client Review

10:30 - 11:15 AM

💼 Strategy Meeting

12:00 - 1:00 PM • Teams

🎯 Product Demo

2:00 - 2:45 PM

Unified Calendar View for Your Users

Let your users connect multiple calendar providers and see all their events in one place. Our API unifies Google Calendar and Outlook Calendar seamlessly.

Your App

Connected:

Google

Outlook

January 2026

Mon

27

Tue

28

Wed

29

Thu

30

Fri

31

9 AM

Team Standup

9:00 - 9:30

Strategy Review

9:00 - 10:00

Sprint Planning

9:00 - 10:00

Weekly Sync

9:00 - 9:30

10 AM

Vendor Call

10:00 - 10:45

Project Review

10:00 - 10:30

Design Review

10:00 - 11:00

11 AM

1:1 with Sarah

11:00 - 11:30

Budget Review

11:00 - 12:00

Client Demo

11:00 - 12:00

Tech Talk

11:30 - 12:00

12 PM

Lunch & Learn

12:00 - 13:00

Team Lunch

12:00 - 13:00

All Hands

12:00 - 13:00

New event

Tue 28 Jan 11:00 am
Onboarding presentation

Google Calendar

Participants (2)

JD

MK

60 mins

Google Meet

POST /calendars/events

201 Created

{
  "account_id": "google_xxx",
  "title": "Onboarding",
  "start": "2026-01-28T11:00",
  "duration": "60"
}

Build Now

Real-Time Updates

Instant Event Notifications

Stay in sync with real-time webhooks. Get notified instantly when events are created, modified, or deleted. Perfect for keeping your app data fresh and preventing double-bookings.

event.created

event.updated

event.deleted

Explore Webhooks

Your App — Webhook Events

calendar.event.created

Team Meeting

Monday, Jan 29 at 10:00 AM
Duration: 1 hour

2s ago

calendar.event.updated

Design Review

Time changed to 2:00 PM
Location updated

15s ago

calendar.event.created

Client Call

Wednesday, Jan 31 at 3:00 PM
With: sarah@client.com

1m ago

calendar.event.deleted

Budget Planning

Event canceled by organizer
Attendees notified

3m ago

Calendar API for Every Use Case

From recruiting to sales, our Calendar API adapts to your workflow. Schedule, sync, and automate meetings across your entire platform.

Recruiting

Schedule Interviews Seamlessly

Let recruiters book candidate interviews directly from your ATS. Sync with hiring managers' calendars and automatically create video meeting links.

Check interviewer availability in real-time

Auto-generate Google Meet or Teams links

Send calendar invites to all participants

Learn More

Interview Scheduled

Tomorrow at 2:00 PM

SJ

Sarah Johnson

Senior Developer • Round 2

Today, 3:00 PM

Confirmed

MK

Michael Kim

Product Manager • Round 1

Tomorrow, 10:00 AM

Pending

EL

Emma Lee

UX Designer • Final Round

Fri, 2:30 PM

Confirmed

Sales

Sync Client Meetings Automatically

Keep your CRM up-to-date with every client interaction. Automatically log meetings, track follow-ups, and never miss an opportunity.

2-way sync between calendar and CRM

Auto-associate meetings with deals

Activity timeline for each contact

Learn More

Meeting Synced

Added to Acme Corp deal

AC

Demo Call - Acme Corp

Today, 2:00 PM • $45,000 deal

Synced

TI

Follow-up - TechInc

Tomorrow, 11:00 AM • $120,000 deal

Synced

GS

Contract Review - GlobalSoft

Friday, 3:30 PM • $85,000 deal

Synced

Automation

Streamline Call Booking

Add calendar booking to your outreach sequences. When prospects respond, automatically send availability and book meetings.

Embed scheduling links in sequences

Detect responses and trigger booking

Create meeting when booking confirmed

Learn More

Call Booked!

John replied & scheduled

1

LinkedIn Connection

Sent • 3 days ago

2

First Email

Opened • 2 days ago

3

Follow-up Email

Replied: "Let's schedule a call"

4

Book Meeting

Scheduled for Tomorrow, 4:00 PM

Supported Providers

Connect Google & Outlook Calendar

Integrate both major calendar platforms with a unified API. Full support for events, meetings, and video conferencing.

January 2026

MTWTFSS

12345 6789101112 13141516171819 20212223242526 2728293031

Team Standup

Google Meet • 30 min

9:00 AM

Google Calendar API

Full integration with Google Calendar and Google Meet. Manage events, check availability, and create video meetings automatically.

OAuth 2.0 authentication

Auto-generate Google Meet links

Multi-calendar support

Real-time webhooks

Explore Google Calendar Google

January 2026

MTWTFSS

12345 6789101112 13141516171819 20212223242526 2728293031

Client Meeting

Microsoft Teams • 1 hour

2:00 PM

Outlook Calendar API

Connect Microsoft 365 and Outlook.com calendars. Full support for Microsoft Teams meetings and shared calendars.

Microsoft Graph integration

Auto-generate Teams meetings

Shared & group calendars

M365 & personal accounts

Explore Outlook Calendar Outlook

Calendar API

Google Calendar API Capabilities

Integrate Google Calendar and Outlook Calendar through a single unified API. Create, update, delete, and manage events across all major providers with consistent endpoints.

Explore All Endpoints

Account ConnectionAccount

Calendar ManagementCalendars

Event ManagementEvents

Webhooks

Account Connection

2 endpoints available

Google

Outlook

Hosted Auth: White label auth

Use your App OAuth screen

Calendar Management

2 endpoints available

Google

Outlook

List Calendars

Get a Calendar

Event Management

8 endpoints available

Google

Outlook

Retrieve all Events

Create an Event

Retrieve an Event

Edit an Event

Delete an Event

Check Availability

Scheduler

Coming soon

Webhooks

3 events available

Google

Outlook

Event Created

Event Updated

Event Deleted

Explore API Reference

Built for Developers

Calendar API Integration for Modern Apps

Connect Google Calendar and Outlook Calendar through a single API. Build faster, integrate efficiently, and deliver seamless scheduling experiences.

Simple Integration

Connect calendars and manage events with just a few lines of code. Our SDK handles authentication, syncing, and error handling.

calendar-sync.js

// Connect any calendar provider in seconds
import { UnipileClient } from 'unipile-node-sdk';

const client = new UnipileClient({
  dsn: 'https://api.unipile.com',
  token: process.env.UNIPILE_TOKEN
});

// Fetch all events from connected calendars
const events = await client.calendar.listEvents({
  limit: 50,
  start_date: '2026-01-28'
});

// Create event with video meeting
await client.calendar.createEvent({
  title: 'Product Demo',
  start: '2026-01-29T14:00:00',
  duration: 60,
  meeting_type: 'google_meet'
});

One Unified API

Auto Video Meetings

Automatically generate Google Meet or Microsoft Teams links when creating events. No extra configuration needed.

SOC 2 Certified

Enterprise-grade security with full compliance. Your users' calendar data stays protected.

2-Way Sync

Bidirectional synchronization keeps your app and calendar providers always in sync. Changes reflect instantly.

Real-time Webhooks

Instant notifications for event.created, event.updated, and event.deleted. No polling required.

Sandbox Environment

Test your integration risk-free with our sandbox. Debug with detailed logs and error tracking.

2

Calendar providers
unified

99.9%

Platform Uptime
over the last 24 months

Fast

Response
time

24/7

Real-time
synchronization

Build Now

Unified Dashboard

One dashboard for all your integrations

Manage all your LinkedIn, WhatsApp, Gmail accounts and more from a single, intuitive interface.

Accounts

20 Operational

0 Authentication required

0 Service interruption

0 Paused

Name ID Status Linked

Michel Opra

acc_01jgpb44tjf... Operational Linked on
03/01/2025

Sarah Johnson

acc_01jgpb55ujk... Operational Linked on
02/15/2025

Thomas Martin

acc_01jgpb66vlm... Operational Linked on
02/10/2025

Michel Opra

acc_01jgpb7tfqf... Operational Linked on
03/01/2025

Emma Wilson

acc_01jgpb8ugr... Operational Linked on
02/28/2025

Lucas Bernard

acc_01jgpb9vhs... Operational Linked on
02/20/2025

Michel Opra

acc_01jgpb4ezwf... Operational Linked on
03/01/2025

Sophie Durand

acc_01jgpb5fax... Operational Linked on
02/25/2025

Michel Opra

acc_01jgpb4vzbf... Operational Linked on
03/01/2025

Marie Lefebvre

acc_01jgpb5wac... Operational Linked on
02/22/2025

Alex Turner

acc_01jgpc1abc... Operational Linked on
02/14/2025

Chloe Davis

acc_01jgpc2bcd... Operational Linked on
02/12/2025

David Chen

acc_01jgpc3cde... Operational Linked on
02/08/2025

Nina Patel

acc_01jgpc4def... Operational Linked on
02/05/2025

Michel Opra

acc_01jgpc9efg... Operational Linked on
03/01/2025

Sarah Johnson

acc_01jgpcafgh... Operational Linked on
02/15/2025

Michel Opra

acc_01jgpcbghi... Operational Linked on
03/01/2025

Marie Lefebvre

acc_01jgpcchij... Operational Linked on
02/22/2025

Try for free

Discover More from Our API Suite

Beyond calendars, Unipile connects your product to social networks, messaging platforms, and email. Build a complete communication layer with a unified API approach.

Social Media API

Access profiles, posts, comments, and engagement data from LinkedIn and Instagram. Perfect for enrichment, social listening, or building audience insights into your platform.

Messaging API

Connect LinkedIn, WhatsApp, Instagram and Telegram messaging to send, receive, and manage conversations programmatically. Build unified inbox features and outreach capabilities in your app.

Email API

Connect Gmail, Outlook, and any IMAP provider to send, receive, and sync emails. Build powerful email features with tracking, threading, and real-time webhooks.

6000+ Companies Innovating with Unipile

Trusted by industry leaders

1 API

Streamline operations for all major communication channels

2 Days

Achieve live integration quickly with minimal setup

30%

Reduction in maintenance efforts and resources

Built-In Security and Compliance

Enterprise-grade protection for your data and workflows Learn more about our security

SOC 2 Type II

Certified

Independently audited security controls ensuring data protection and operational integrity.

GDPR

Compliant

Full compliance with European data protection regulations for user privacy.

99.9%

Platform Uptime over the last 24 months

24/7

Global Support with high-performance API

Calendar API FAQ

Everything you need to know about integrating the Calendar API into your application

01 What is Unipile's Calendar API and what can I do with it?

Unipile's Calendar API allows you to integrate Google Calendar and Outlook Calendar into your application through a single unified API. You can create, read, update, and delete events, check availability, manage attendees, auto-generate video meeting links (Google Meet or Microsoft Teams), and receive real-time webhook notifications when events change.

02 Which calendar providers does Unipile support?

Unipile currently supports Google Calendar and Microsoft Outlook Calendar. Both providers are accessible through the same unified API endpoints, so you write your integration once and it works for both.

03 Can I automatically create Google Meet or Microsoft Teams links?

Yes! When creating an event via the API, you can specify a meeting type parameter. For Google Calendar accounts, you can auto-generate Google Meet links. For Outlook Calendar accounts, you can auto-generate Microsoft Teams meeting links. The meeting URL is returned in the API response and automatically added to the calendar invite.

04 How does authentication work for end users?

Unipile handles OAuth 2.0 authentication for you. We provide a hosted connect flow that you can embed in your app. When users connect their calendar, they authenticate directly with Google or Microsoft, and Unipile securely stores and manages their tokens. You never have to handle OAuth complexity or token refresh logic.

05 What are webhooks and how do they work?

Webhooks allow your application to receive real-time notifications when calendar events change. Instead of constantly polling the API, Unipile pushes updates to your server instantly when an event is created, updated, or deleted. This keeps your app data fresh and helps prevent issues like double-bookings.

06 Can users connect multiple calendars from different providers?

Absolutely! A single user can connect both their Google Calendar and Outlook Calendar accounts. Your app can display events from all connected calendars in a unified view, and you can specify which calendar to use when creating new events. This is perfect for users who manage both personal and work calendars on different platforms.

07 Is Unipile's Calendar API secure and compliant?

Yes. Unipile is SOC 2 certified, meaning we follow strict security practices for data protection, access control, and monitoring. All data is encrypted in transit and at rest. We also maintain compliance with GDPR requirements. Your users' calendar data is handled with enterprise-grade security.

08 What use cases is the Calendar API best suited for?

The Calendar API is ideal for ATS/recruiting software (scheduling interviews), CRM platforms (syncing client meetings), sales engagement tools (booking calls from outreach sequences), scheduling applications, team collaboration tools, and any app that needs to create or display calendar events.

09 Does Unipile handle API updates from Google and Microsoft?

Yes! Unipile monitors and adapts to changes in Google Calendar API and Microsoft Graph API on your behalf. When these providers make updates or deprecate endpoints, we handle the migration so your integration continues working without any code changes on your end.

10 How do I get started with the Calendar API?

Getting started is simple: sign up for a free 7-day trial, get your API credentials from the dashboard, and start making API calls. We provide SDKs for popular languages, detailed documentation, and a sandbox environment for testing. Most developers have their first integration running within a few hours.

Still have questions? Our team is here to help.