Read Events
Required plan: StarterDescription #
Returns a list of events across all of a users calendars.
By default, the events you are managing on behalf of the account are excluded from the query results.
The returned events will start before the given to
Date
and will end on or after the given from
Date
.
Note that the events you manage are not subject to the default from
and to
date restrictions and so if you specify neither, you will retrieve all the events you are managing for the account across all of time.
Example Request #
The parameters are encoded in the querystring as specified in appendix B of RFC 6749. Additional linebreaks are added to the request’s path for clarity.
GET /v1/events?from={FROM_DATE}&to={TO_DATE}&tzid={TZID} HTTP/1.1
Host: {data_center_url}
Authorization: Bearer {ACCESS_TOKEN}
Example Response #
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
{
"pages": {
"current": 1,
"total": 2,
"next_page": "https://api.cronofy.com/v1/events/pages/08a07b034306679e"
},
"events": [
{
"calendar_id": "cal_U9uuErStTG@EAAAB_IsAsykA2DBTWqQTf-f0kJw",
"event_uid": "evt_external_54008b1a4a41730f8d5c6037",
"summary": "Company Retreat",
"description": "",
"start": "2014-09-06",
"end": "2014-09-08",
"deleted": false,
"created": "2024-10-30T08:00:01Z",
"updated": "2024-10-30T09:24:16Z",
"location": {
"description": "Beach"
},
"participation_status": "needs_action",
"attendees": [
{
"email": "example@cronofy.com",
"display_name": "Example Person",
"status": "needs_action"
}
],
"organizer": {
"email": "example@cronofy.com",
"display_name": "Example Person"
},
"transparency": "opaque",
"status": "confirmed",
"categories": [],
"recurring": false,
"event_private": false,
"options": {
"delete": true,
"update": true,
"change_participation_status": true
}
}
]
}
Request parameters #
data_center_url required
The URL for the data center you want to communicate with. Possible choices are:
api-au.cronofy.com
- 🇦🇺 Australiaapi-ca.cronofy.com
- 🇨🇦 Canadaapi-de.cronofy.com
- 🇩🇪 Germanyapi-sg.cronofy.com
- 🇸🇬 Singaporeapi-uk.cronofy.com
- 🇬🇧 United Kingdomapi.cronofy.com
- 🇺🇸 United States
Find out more about Cronofy's data centers.
from optional #
The oldest Date
from which to return events. When provided, this must be within the last 42 days.
If not provided, defaults to the maximum value of 42 days in the past. This value will not accept a time as part of the string, it will ignore the time provided and read from the start of the day.
To surpass this 42 day limit, the emerging plan is needed along with a message to support requesting an extension to the sync period. Plans and pricing can be found here.
to optional #
The Date
to return events up until, when provided must be less than or equal to 201 days in the future.
If not provided, defaults to the maximum value of 201 days in the future.
Note that the query times are inclusive of the from
date and exclusive of the to
date - the results will not include events occurring on the to
date. For example, if you request from
2024-10-30 to
2024-11-06, the results will contain events on the days of the 2024-10-30, up to and including the 2024-11-05 but not 2024-11-06. To include the 2024-11-06 you will need to set the to
date as 2024-11-07.
This value will also not accept timing as part of the string, it will ignore the time provided and read from the start of the day.
tzid required #
A String
representing a known time zone identifier from the IANA Time Zone Database.
Common examples are:
Etc/UTC
Europe/Paris
America/Chicago
It is recommended that you use the same tzid
for all requests made for an individual user in order to ensure all their events are returned to you.
include_deleted optional #
A Boolean
specifying whether managed and external events that have been deleted should included or excluded from the results.
If not provided, only non-deleted events are returned.
include_moved optional #
A Boolean
specifying whether managed and external events that have ever existed within the given window should be included or excluded from the results.
If not provided, only events that are currently within the search period are returned.
last_modified optional #
The Time
that events must be modified on or after in order to be returned.
If not provided, all events are returned regardless of when they were last modified.
include_managed optional #
A Boolean
specifying whether events that you are managing for the account should be included or excluded from the results.
If not provided, only non-managed events are returned.
only_managed optional #
A Boolean
specifying whether only events that you are managing for the account should be included in the results.
calendar_ids[] optional #
Restricts the returned events to those within the set of specified calendar_id
s.
The calendar_ids[]
parameter can be specified multiple times within the query string to include events from multiple calendars:
calendar_ids[]=cal_U9uuErStTG@EAAAB_IsAsykA2DBTWqQTf-f0kJw&calendar_ids[]=cal_U@y23bStTFV7AAAB_iWTeH8WOCDOIW@us5gRzww
The possible calendar_id
s can be discovered through the list calendars endpoint.
If no calendars are specified, the default behaviour is to return events from all of the user’s calendars.
localized_times optional #
A Boolean
specifying whether the events should have their start
and end
times returned with any available localization information.
If not provided the start
and end
times will be returned as simple Time
values.
include_geo optional #
A Boolean
specifying whether the events should have their location.lat
and location.long
returned where available.
Verified applications must have geo-location included in their plan or the API call will result in a 402 error.
include_userinfo optional #
A Boolean
specifying whether the response should include an embedded userinfo response.
Response parameters #
pages.current #
An Integer
specifying which page of the result set the current request is for.
pages.total #
An Integer
specifying the total number of pages in the result set.
pages.next_page optional #
When present, a String
specifying the URL for the next page of results.
The next page of results can be retrieved by issuing a GET
request to this URL and you will receive a response in the same format as a regular read events request.
userinfo optional #
An embedded userinfo response if include_userinfo
was specified.
events.calendar_id #
This specifies the ID of the calendar as an ASCII-only String
.
events.event_uid #
This uniquely identifies the event as an ASCII-only String
.
events.summary #
The String
value of the summary, sometimes referred to as the name, of the event.
events.description #
The plain text String
value of the description, sometimes referred to as the notes, of the event.
events.start #
When localized_times
is not specified or is false
, the Time
or Date
representing when the event starts.
When localized_times
is true
, an object with two attributes, time
and tzid
:
{
"time": "2014-09-13T23:00:00+02:00",
"tzid": "Europe/Paris"
}
The time
attribute is the Time
or Date
representing when the event starts. This will be provided with an offset matching that of the corresponding tzid
.
The tzid
attribute specifies a String
representing a known time zone identifier from the IANA Time Zone Database.
Common examples are:
Etc/UTC
Europe/Paris
America/Chicago
events.end #
When localized_times
is not specified or is false
, the Time
or Date
by which the event ends.
When localized_times
is true
, an object with two attributes, time
and tzid
:
{
"time": "2014-09-13T23:00:00+02:00",
"tzid": "Europe/Paris"
}
The time
attribute is the Time
or Date
by which the event ends. This will be provided with an offset matching that of the corresponding tzid
.
The tzid
attribute specifies a String
representing a known time zone identifier from the IANA Time Zone Database.
Common examples are:
Etc/UTC
Europe/Paris
America/Chicago
Also note that end
is exclusive, for Time
-based events this makes no noticeable difference, but for Date
-based events this can be confusing. It may help to think of the end
as the point in time by which the event will have ended. When based on time the event an event with an end of 11:30
is actually expected to end at 11:29.99999
so it would not overlap a following event starting at 11:30
. When working with dates the same logic applies so an all day event you wish to cover March 17th would start on March 17th but end before March 18th.
events.url #
A String
that represents the url value associated with the event.
Support for event URLs is currently limited to Apple and Google.
events.deleted #
This specifies whether the event has been deleted as a Boolean
.
events.created #
The Time
the event was created.
events.updated #
The Time
the event was last updated.
events.location.description optional #
The plain text String
describing the event’s location.
events.location.lat optional #
The String
representing the event’s latitude.
events.location.long optional #
The String
representing the event’s longitude.
events.event_id optional #
When the event is one you are managing for the account, the event_id
you specified when creating the event will be returned to allow you to reconcile it against your system.
events.participation_status #
A String
representing the participation status of the account with regard to the event.
One of:
needs_action
the event needs action by the account, usually they have been sent an invite but are yet to respondaccepted
they have accepted an invitation to the eventdeclined
they have declined an invitation to the eventtentative
they have tentatively accepted an invitation to the eventunknown
their participation status for the event is unknown
This is intended to help discern the status of the event for the account without having to understand which of the attendees
entries relates to them. It will also be populated when there are no attendees
as this is inferred to be a personal entry.
unknown
is not expected to be used but is included and documented so there is a documented response for events we may not know how to categorize.
events.attendees.email #
The email address associated with the attendee as a String
.
events.attendees.display_name #
A human-friendly name associated with the attendee as a String
, may be null
.
events.attendees.status #
A String
representing the participation status of the attendee with regard to the event.
One of:
needs_action
the event needs action by the attendee, usually they have been sent an invite but are yet to respondaccepted
they have accepted an invitation to the eventdeclined
they have declined an invitiation to the eventtentative
they have tentatively accepted an invitation to the eventunknown
their participation status for the event is unknown
unknown
is not expected to be used but is included and documented so there is a documented response for attendees we may not know how to categorize.
events.organizer.email #
The email address of the organizer as a String
.
For Managed Events the value of the organizer
parameter is always null
.
events.organizer.display_name #
A human-friendly name of the organizer as a String
, may be null
.
events.transparency #
A String
defining whether an event is transparent or not to free-busy searches.
One of:
opaque
the account should appear as busy for the duration of the eventtransparent
the account should not appear as busy for the duration of the eventunknown
the transparency of the event is unknown
unknown
is not expected to be used but is included and documented so there is a documented response for events we may not know how to categorize.
events.extended_transparency ALPHA #
A String
providing an enhanced view on a standard transparency
value and exposes more about the nature of the event when available from the calendar provider.
This value will always be populated and will match the value of transparency
if none of the enhanced values are relevant or available.
Currently only events within Microsoft 365 and Exchange calendars can return the extended values.
This may be one of the standard transparency
values as above:
opaque
the account should appear as busy for the duration of the eventtransparent
the account should not appear as busy for the duration of the eventunknown
the transparency of the event is unknown
Or an an extended value:
working_elsewhere
indicates the user is working away from their normal sitetentative
indicates an invitation not yet responded to, or which has been responded to tentativelyout_of_office
indicates the user is unavailable due to being out of the office, such as being on vacation
These values map to Microsoft Outlook’s “Show as” UI and to standard transparency
as follows:
Outlook Show as | transparency | extended_transparency |
---|---|---|
Free | transparent | transparent |
Busy | opaque | opaque |
Working elsewhere | opaque | working_elsewhere |
Tentative | opaque | tentative |
Away | opaque | out_of_office |
unknown
is not expected to be used but is included and documented so there is a documented response for events we may not know how to categorize.
events.status #
A String
defining the overall status of the event.
This is provided from the calendar providers but does not represent a summary of the attendee statuses.
One of:
tentative
the event is probably going to occurconfirmed
the event is going to occurcancelled
the event is no longer going to occurunknown
the status of the event is unknown
unknown
is not expected to be used but is included and documented so there is a documented response for events we may not know how to categorize.
events.conferencing.provider_name optional #
The String
value for the conferencing provider used for the meeeting.
events.conferencing.join_url optional #
The String
value for the conferencing URL that can be used to join the meeting.
meeting_url optional #
The String
value for the conferencing URL that can be used to join the meeting, if the event is an external event (not created by Cronofy).
events.categories #
An array of String
s exposing the categories assigned to the event.
Each category is a free-text String
. For the underlying providers that do not support the concept of categories, this will always be an empty array.
events.tags optional #
An Object
describing zero or more contextual Tag
values currently attached to the event.
events.attachments optional ALPHA #
An Array
of the ids of attachments currently attached to the event.
events.recurring #
A Boolean
specifying whether this is a recurring event.
events.series_identifier optional #
A String
indicating the recurring series the event is a part of, when relevant.
Recurring events are created as external events and so this parameter will only be present on the following recurring events and not the original managed event from which the recurrence is created.
events.event_private #
A Boolean
specifying whether this is a private event.
events.options.delete #
A Boolean
specifying whether permission exists to delete this event.
events.options.update #
A Boolean
specifying whether permission exists to update this event.
events.options.change_participation_status #
A Boolean
specifying whether permission exists to change the user’s participation status with regard to this event.
Error responses #
401 Unauthorized #
The request was refused as the provided authentication credentials were not recognized.
When an OAuth refresh_token
is available then it should be used to request a replacement auth_token
before the request is retried.
403 Forbidden #
The request was refused as the provided authorization credentials were recognized but does not grant the read_free_busy
scope which was required for the request.
You will need to make an additional authorization request including the read_free_busy
scope before retrying the request.
Note that the read_events
scope implicitly includes this scope as it allows access to a higher level of information than free-busy so you do not have to request both.
422 Unprocessable #
The request was unable to be processed due to it containing invalid parameters.
The response will contain a JSON object containing one or more errors relating to the invalid parameters.
For example, if you omitted the required tzid
parameter, you would receive a response like:
{
"errors": {
"tzid": [
{
"key": "errors.required",
"description": "required"
}
]
}
}
The key
field is intended for programmatic use and the description
field is a human-readable equivalent.
Incremental Synchronization #
When performing incremental synchronization, usually in reaction to a change
push notification, there is a recommended combination to fetch incremental changes in order to update your cache of event information.
tzid
is required - it is generally recommended this is a consistent value such asEtc/UTC
- both
from
andto
should be omitted from the request to ensure all changes are received include_deleted
should betrue
to receive details of events that have been deleted, not just those updated or changedinclude_managed
should betrue
to ensure events you are managing are included if you have such accesslast_modified
should be provided to only return the events changed on or after the specified time - this can be tracked by your application seperately, or thechanges_since
parameter of the push notification used if you are processing every notification
Example Request #
GET /v1/events?tzid=Etc%2FUTC&last_modified={changes_since}&include_ids=true&include_deleted=true&include_managed=true&include_free=true HTTP/1.1
Host: {data_center_url}
Authorization: Bearer {ACCESS_TOKEN}
Example Response #
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
{
"pages": {
"current": 1,
"total": 1
},
"events": [
{
"calendar_id": "cal_U9uuErStTG@EAAAB_IsAsykA2DBTWqQTf-f0kJw",
"event_uid": "evt_external_54008b1a4a41730f8d5c6037",
"summary": "Company Retreat",
"description": "",
"start": "2014-09-06",
"end": "2014-09-08",
"deleted": false,
"created": "2024-10-30T08:00:01Z",
"updated": "2024-10-30T09:24:16Z",
"location": {
"description": "Beach"
},
"participation_status": "needs_action",
"attendees": [
{
"email": "example@cronofy.com",
"display_name": "Example Person",
"status": "needs_action"
}
],
"organizer": {
"email": "example@cronofy.com",
"display_name": "Example Person"
},
"transparency": "opaque",
"status": "confirmed",
"categories": [],
"recurring": false,
"event_private": false,
"options": {
"delete": true,
"update": true,
"change_participation_status": true
}
}
]
}