Calendar & Contacts

EUnifyer supports both standards-based protocols (CalDAV, CardDAV) and a REST API for calendar and contacts access. For external integrations, the standards-based path is recommended — it works with any compatible client out of the box.

Which path to use

Use case	Recommended
Connect Apple Calendar, Thunderbird, GNOME Calendar	CalDAV
Connect Apple Contacts, Thunderbird, GNOME Contacts	CardDAV
Build a server-side integration or sync job	CalDAV / CardDAV or REST
Mobile app syncing calendars/contacts	CalDAV / CardDAV
REST programmatic access (events, contacts)	REST API

CalDAV (Calendar)

Endpoint base: https://api.eunifyer.com/caldav/
Standard: RFC 4791 (CalDAV) + RFC 6638 (scheduling extensions)
Auth: HTTP Basic (username:password) or Authorization: Bearer <token>
Service discovery: https://api.eunifyer.com/.well-known/caldav (RFC 6764)

Connect a calendar client

Give users this URL for calendar client setup:


https://api.eunifyer.com/caldav/

Most clients (Apple Calendar, Thunderbird, GNOME Calendar) auto-configure from the well-known URL. After discovery, the client reads user calendars via PROPFIND and syncs events via REPORT.

Programmatic CalDAV access

Read events in a date range:


curl -X REPORT "https://api.eunifyer.com/caldav/{username}/{calendar-uid}/" \
  -u "username:password" \
  -H "Content-Type: application/xml; charset=utf-8" \
  -H "Depth: 1" \
  -d '<?xml version="1.0" encoding="utf-8"?>
  <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
    <D:prop><D:getetag/><C:calendar-data/></D:prop>
    <C:filter>
      <C:comp-filter name="VCALENDAR">
        <C:comp-filter name="VEVENT">
          <C:time-range start="20260401T000000Z" end="20260430T235959Z"/>
        </C:comp-filter>
      </C:comp-filter>
    </C:filter>
  </C:calendar-query>'

Create or update an event:


curl -X PUT "https://api.eunifyer.com/caldav/{username}/{calendar-uid}/{event-uid}.ics" \
  -u "username:password" \
  -H "Content-Type: text/calendar; charset=utf-8" \
  -d 'BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Example//EN
BEGIN:VEVENT
UID:event-uid@example.com
DTSTART:20260420T100000Z
DTEND:20260420T110000Z
SUMMARY:Team standup
END:VEVENT
END:VCALENDAR'

Delete an event:


curl -X DELETE "https://api.eunifyer.com/caldav/{username}/{calendar-uid}/{event-uid}.ics" \
  -u "username:password"

REST Calendar API

Base path: /api/v1/calendar/
Auth: Bearer token (PAT, Keycloak JWT)
Scopes: calendar:read (read), calendar:write (create/update/delete)

Endpoints


GET  /api/v1/calendar/calendars                           → list of CalendarInfo
GET  /api/v1/calendar/events?start=…&end=…                → events across all calendars
GET  /api/v1/calendar/calendars/{cal_id}/events           → events in one calendar
GET  /api/v1/calendar/calendars/{cal_id}/events/{uid}     → single event
POST /api/v1/calendar/calendars/{cal_id}/events           → create event
PUT  /api/v1/calendar/calendars/{cal_id}/events/{uid}     → replace event
DELETE /api/v1/calendar/calendars/{cal_id}/events/{uid}   → delete event
POST /api/v1/calendar/freebusy                            → free/busy query
POST /api/v1/calendar/calendars/{cal_id}/import           → import ICS file
GET  /api/v1/calendar/calendars/{cal_id}/export.ics       → export calendar as ICS

Example — list upcoming events


curl "https://api.eunifyer.com/api/v1/calendar/events?start=2026-04-01T00:00:00Z&end=2026-04-30T23:59:59Z" \
  -H "Authorization: Bearer $TOKEN"

Example — create an event


curl -X POST https://api.eunifyer.com/api/v1/calendar/calendars/$CAL_ID/events \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "title": "Quarterly review",
    "start": "2026-04-20T09:00:00Z",
    "end": "2026-04-20T10:00:00Z",
    "description": "Q1 results discussion",
    "attendees": ["alice@example.com", "bob@example.com"]
  }'

Import and export


# Import ICS file
curl -X POST https://api.eunifyer.com/api/v1/calendar/calendars/$CAL_ID/import \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: text/calendar" \
  --data-binary @events.ics
 
# Export as ICS
curl https://api.eunifyer.com/api/v1/calendar/calendars/$CAL_ID/export.ics \
  -H "Authorization: Bearer $TOKEN" \
  -o calendar.ics

CardDAV (Contacts)

Endpoint base: https://api.eunifyer.com/carddav/
Standard: RFC 6352 (CardDAV)
Auth: HTTP Basic or Authorization: Bearer <token>
Service discovery: https://api.eunifyer.com/.well-known/carddav
ETag support: Active — use If-Match for safe updates

Connect a contacts client

Give users this URL for contacts client setup:


https://api.eunifyer.com/carddav/

Clients (Apple Contacts, Thunderbird, GNOME Contacts) auto-configure from the well-known URL.

Programmatic CardDAV access

List contacts in an address book:


curl -X REPORT "https://api.eunifyer.com/carddav/{username}/{book-uid}/" \
  -u "username:password" \
  -H "Content-Type: application/xml; charset=utf-8" \
  -H "Depth: 1" \
  -d '<?xml version="1.0" encoding="utf-8"?>
  <C:addressbook-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:carddav">
    <D:prop><D:getetag/><C:address-data/></D:prop>
  </C:addressbook-query>'

Create or update a contact (VCard):


curl -X PUT "https://api.eunifyer.com/carddav/{username}/{book-uid}/{contact-uid}.vcf" \
  -u "username:password" \
  -H "Content-Type: text/vcard; charset=utf-8" \
  -d 'BEGIN:VCARD
VERSION:3.0
UID:contact-uid@example.com
FN:Alice Chen
N:Chen;Alice;;;
EMAIL:alice@example.com
TEL:+1-555-0100
END:VCARD'

REST Contacts API

Base path: /api/v1/contacts/
Auth: Bearer token
Scopes: contacts:read / contacts:write

Endpoints


GET  /api/v1/contacts/books                               → list of AddressBook
GET  /api/v1/contacts/books/{book_id}                     → list of ContactSummary
GET  /api/v1/contacts/books/{book_id}/{contact_id}        → ContactDetail
POST /api/v1/contacts/books/{book_id}                     → create contact
PUT  /api/v1/contacts/books/{book_id}/{contact_id}        → replace contact
DELETE /api/v1/contacts/books/{book_id}/{contact_id}      → delete contact
GET  /api/v1/contacts/search?q=…                          → search contacts
GET  /api/v1/contacts/directory                           → organisation directory

Example — search contacts


curl "https://api.eunifyer.com/api/v1/contacts/search?q=alice" \
  -H "Authorization: Bearer $TOKEN"

Webhook events

Event	Fires when
`calendar.event.created`	A calendar event is created
`calendar.event.updated`	A calendar event (or single occurrence) is updated

Subscribe via the Webhooks API to receive real-time notifications.