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REST API: Get Event Attendees | Axero Documentation

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REST API: Get Event Attendees

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Open API Guide
GET/api/events/{EventID}/attendees

Get the attendees of an event, filtered by RSVP type. The response is a plain list of event users, not the standard response with IsError, ResponseMessage, and ResponseData. It is an empty list when nothing matches.

Request

Request Header

HeaderRequiredValueDescription
AuthorizationYESBearer YOUR_TOKENBearer token for the authenticated user. Learn how to create Bearer tokens.

Required Parameters

ParameterTypeRequiredLocationDescription
EventIDIntegerYESPathUnique ID of the event

Optional Parameters

ParameterTypeRequiredLocationDescription
AttendanceIntegerNOQueryAttendance type to filter by: 1 = Attending, 2 = Maybe attending, 3 = Not attending, 4 = All, 5 = Awaiting response, 6 = Shared. Refer to REST API: Event Attendance Types.
IsInvitedBooleanNOQuerySet to true to return only users who were invited to the event
KeywordStringNOQuerySearch term to filter the event users by
StartPageIntegerNOQueryThe page of results to return. Defaults to 1. A value that is not a whole number is ignored and the first page is returned.
PageLengthIntegerNOQueryThe number of results per page. When omitted, every attendee is returned. A value that is not a whole number is ignored.
SpaceIDUsersIntegerNOQueryMarks each returned attendee who is a member of this space with IsSpaceUser true. It does not filter the list; every attendee is still returned.
SpaceAttendanceStringNOQuerySpace-level attendance status to filter by, same values as Attendance.
InstanceStringNOQueryOccurrence date (ISO 8601) of a recurring event. A value that is not a date answers 500.
InstanceOptionIntegerNOQueryFor a recurring event, which occurrences Instance refers to: 1 = All, 2 = Future, 3 = Single (default).

Example

Request Header

Authorization: Bearer YOUR_TOKEN

Request URL

https://your-site.com/api/events/153/attendees?Attendance=1&StartPage=1&PageLength=50

Success Response

[
  {
    "AttendanceType": 1,
    "AttendanceID": 37089,
    "IsInvited": false,
    "Organizer": false,
    "IsDeleted": false,
    "IsSpaceUser": false,
    "UserName": "jane.doe",
    "MediaServerID": 88,
    "FirstName": "Jane",
    "LastName": "Doe",
    "ProfileURL": "https://your-site.com/people/jane.doe",
    "ConnectionStatus": 0,
    "UserID": 1042,
    "UserInfoDisplayName": "Jane Doe",
    "Email": "jane.doe@example.com",
    "AvatarImageURL": "https://your-site.com/Assets/Uploaded-Photos/1/avatar.jpg",
    "IsCommunityUser": true,
    "TenantID": 0
  }
]

Error Response

{
  "Message": "The request is invalid."
}

Error Handling

Status CodeLikely CauseNext Action
400 Bad RequestEventID in the path is not an integer, or a value is not of the documented type.Check the values.
401 UnauthorizedA missing or invalid Bearer token answers 401 only on a site that allows members only; otherwise the call runs as a guest.Check token validity. Learn how to create Bearer tokens →
403 ForbiddenNot returned: the attendee list comes back without a check that answers 403.Check the EventID if the list looks wrong.
500 Server ErrorInternal failure.Retry later.

Rate Limits

While Axero does not enforce hard rate limits by default, we recommend the following best practices to ensure optimal performance:

  • Sustained Request Rate: Do not exceed 5 API calls per second
  • Sequential Processing: Wait for each request to complete before sending the next in automated workflows
  • Concurrent Connections: If parallel processing is required, limit to 3 or fewer simultaneous requests
  • Response Timeout: Ensure API responses complete within 15 seconds during testing

Axero may implement temporary rate restrictions if excessive API usage affects overall site performance. For high-volume integrations, contact Axero to discuss your requirements.

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