These APIs retrieve and manage attendee messages—communications exchanged between attendees within channels. Channels are virtual spaces created for one-on-one or group conversations, allowing attendees to communicate directly or in groups during an event.
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openapi: 3.0.2
info:
title: Cvent REST APIs — Attendee Messages
version: ea
description: These APIs retrieve and manage attendee messages—communications exchanged between attendees within channels.
Channels are virtual spaces created for one-on-one or group conversations, allowing attendees to communicate directly
or in groups during an event.
contact:
name: Cvent Development Platform
url: https://developers.cvent.com/
externalDocs:
description: Cvent REST API documentation
url: https://developers.cvent.com/documentation
servers:
- url: https://api-platform.cvent.com/ea
- url: https://api-platform-eur.cvent.com/ea
tags:
- name: Attendee Messages
description: These APIs retrieve and manage attendee messages—communications exchanged between attendees within channels.
Channels are virtual spaces created for one-on-one or group conversations, allowing attendees to communicate directly
or in groups during an event.
paths:
/events/{eventId}/attendee-messages/members:
get:
operationId: getAttendeeMessagesMembers
summary: Get Messaging Members
description: 'When attendee initiates a chat with other attendee(s), a channel is created for attendees to communicate
over.
This endpoint is used to retrieve the members of these channels using channel ids to filter the results.
The results will include all the channel members; even the ones that left the channel at some point.
'
tags:
- Attendee Messages
security:
- OAuth2.clientCredentials:
- event/attendee-messages:read
- OAuth2.authorizationCode:
- event/attendee-messages:read
parameters:
- $ref: '#/components/parameters/eventId5'
- $ref: '#/components/parameters/limit'
- $ref: '#/components/parameters/token'
- name: filter
in: query
required: true
schema:
type: string
description: 'Filters narrow results returned based on the criteria you supply.
Filters follow the pattern `filter=''field'' operator ''value''`.
The following comparison operators are supported:
- `eq`: equals to
- `in`: match any of the values in the list
The following fields are supported:
| Field | Operators |
|------------------|------------------------------------|
| channel.id | `eq`, `in` |
The following logical operators are supported for combining filters:
- `or`
**Examples:**
Filter channel IDs:
* `filter=channel.id in (''production_group_0cb93bab-32d2-4f82-b430-e1911f2348ac'', ''production_group_f6dfb98a-c734-487c-97e1-7c7a09a9125f'')`
* `filter=channel.id eq ''production_attendee_616241fd-e97d-48c5-8c4b-4b926f50e8c3'' or channel.id eq ''production_group_616241fd-e97d-48c5-8c4b-4b926f50e8c3''`
'
responses:
'200':
description: Successfully retrieved the list of members.
content:
application/json:
schema:
$ref: '#/components/schemas/message-recipients-paginated-response'
'400':
$ref: '#/components/responses/BadRequest1'
'401':
$ref: '#/components/responses/Unauthorized1'
'403':
$ref: '#/components/responses/Forbidden1'
'404':
$ref: '#/components/responses/NotFound1'
'429':
$ref: '#/components/responses/TooManyRequests1'
externalDocs:
description: More about OAuth2 authorization code support for administrators
url: '#oauth2-auth-code-planner-admin'
components:
schemas:
Link:
title: Link
required:
- href
type: object
description: Represents a link to a related resource.
properties:
href:
type: string
description: A url provided that can be followed for linking
example: ?token=90c5f062-76ad-4ea4-aa53-00eb698d9262
PaginationLinks:
title: PaginationLinks
type: object
description: Represents pagination links for navigating between pages of data.
properties:
next:
$ref: '#/components/schemas/Link'
self:
$ref: '#/components/schemas/Link'
prev:
$ref: '#/components/schemas/Link'
MessageRecipientResponse:
title: Message Recipient Response
description: Members of the channel who received a message.
type: object
required:
- attendee
- channel
properties:
attendee:
type: object
description: The attendee object
required:
- id
- active
properties:
id:
type: string
description: Unique identifier for the attendee.
example: 0a459133-1f5e-43b2-8694-7da9541b3f58
active:
type: boolean
description: True indicates the recipient is active in the channel.
example: false
leftChannelAt:
type: string
format: date-time
description: ISO 8601 formatted timestamp when the attendee left the channel, if applicable.
example: '2025-03-13T18:00:00.000Z'
nullable: true
channel:
type: object
description: The channel object
required:
- id
properties:
id:
type: string
description: Identifier for the channel.
example: production_group_0cb93bab-32d2-4f82-b430-e1911f2348ac
Paging:
title: Paging
required:
- _links
type: object
description: Represents pagination information for a collection of resources.
properties:
previousToken:
type: string
description: The pagination token for the previous page, if one exists. You can use this token to navigate to the
previous page of data.
example: 1a2b3c4d5e6f7g8h9i10j11k
nextToken:
type: string
description: The pagination token for the next page. If this value is present in the response, there is another
page of data you can fetch.
example: 1a2b3c4d5e6f7g8h9i10j11k
currentToken:
type: string
description: The pagination token for the current page.
example: 1a2b3c4d5e6f7g8h9i10j11k
limit:
type: integer
description: The number of records to return on the page. Not to exceed 200.
example: 100
totalCount:
type: integer
description: The total number of records available. This field may return blank, even if there are more records.
To confirm if there are more records, check the `nextToken` field.
example: 2
_links:
$ref: '#/components/schemas/PaginationLinks'
ErrorResponseBase1:
title: ErrorResponseBase
type: object
description: Represents an error response with no additional details.
required:
- code
- message
properties:
code:
type: integer
description: The HTTP status code representing the error.
example: 400
message:
type: string
description: A brief description of the error.
example: Bad Request
target:
type: string
description: The target resource of the error.
example: example target
event-id1:
title: Event ID
description: The UUID identifier for an Event.
type: string
format: uuid
example: eeeeb4b4-d132-4db4-aaa7-5ec58efd65c8
message-recipients-paginated-response:
title: Paginated Channel Members Response
description: The response matching the filter criteria for the list of channel members.
required:
- paging
- data
type: object
properties:
paging:
$ref: '#/components/schemas/Paging'
data:
type: array
items:
$ref: '#/components/schemas/MessageRecipientResponse'
description: Collection of channel members.
ErrorResponse-12:
title: ErrorResponse
description: Represents an error response with additional details of cascading error messages.
allOf:
- $ref: '#/components/schemas/ErrorResponseBase1'
type: object
required:
- code
- message
properties:
details:
type: array
items:
$ref: '#/components/schemas/ErrorResponseBase1'
description: Additional details of cascading error messages.
parameters:
eventId5:
in: path
name: eventId
description: Unique ID of an event
required: true
schema:
$ref: '#/components/schemas/event-id1'
token:
name: token
in: query
description: 'The continuation token returned from a previous class. This must be a valid UUID v4 if provided.
This will override any other pageable parameters provided.
'
style: form
explode: true
schema:
type: string
example: 0e28af57-511f-47ab-ae46-46cd1ca51a1a
limit:
name: limit
in: query
description: The maximum number of records to return per page.
style: form
explode: true
schema:
maximum: 200
minimum: 1
type: integer
default: 100
example: 100
responses:
BadRequest1:
description: Bad request
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse-12'
example:
code: 400
message: Bad Request
Unauthorized1:
description: Bad or expired token
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse-12'
example:
code: 401
message: Unauthorized
Forbidden1:
description: You do not have access to the resource
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse-12'
example:
code: 403
message: Access Forbidden
NotFound1:
description: Resource not found
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse-12'
example:
code: 404
message: Not found
TooManyRequests1:
description: Too many requests
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse-12'
example:
code: 429
message: Limit Exceeded
securitySchemes:
OAuth2.clientCredentials:
type: oauth2
description: OAuth2 Client Credentials Flow.
flows:
clientCredentials:
tokenUrl: https://api-platform.cvent.com/ea/oauth2/token
scopes:
account/hooks:delete: Allows the deletion of hooks.
account/hooks:read: Allows the reading of hooks.
account/hooks:write: Allows the creation/updation of hooks.
account/user-groups:delete: Allows deletion for user groups
account/user-groups:read: Allows the reading of user groups
account/user-groups:write: Allows the writing of user groups
account/users:delete: Allows the deletion of User
account/users:read: Allows the reading of User, User Group
account/users:write: Allows the creation/updating of User
appointments/appointment-attendees:read: Allows the reading of appointment attendees and their related entities.
appointments/appointment-events:read: Allows the reading of appointment events and their related entities.
appointments/appointment-types:read: Allows the reading of appointment types and their related entities.
appointments/appointments:read: Allows the reading of appointment and their related entities.
appointments/appointments:write: Allows the writing of appointments and their related entities.
appointments/available-times:read: Allows the reading of availability times.
appointments/locations:read: Allows the reading of appointment locations and their related entities.
attendee-insights/attendee-insights:read: Allows the reading of engagement scores (attendee insights).
attendee-insights/scores:read: Allows the reading of scores.
attendee-insights/stats:read: Allows the reading of engagement score (attendee insight) stats.
budget/budget-items:delete: Allows the deletion of budget items
budget/budget-items:read: Allows the reading of all budget items
budget/budget-items:write: Allows creation/updation of budget item
budget/budget-totals:read: Allows the reading of all event budget totals
budget/budget-vendors:read: Allows reading of account-level budget vendors.
budget/cards:read: Allows the reading of cards
budget/currency-conversion-rate:delete: Allows deletion of currency conversion rate for currency.
budget/currency-conversion-rate:read: Allows reading of currency conversion rate for currency.
budget/currency-conversion-rate:write: Allows creation/update of currency conversion rate for currency.
budget/payments:delete: Allows deletion of payments.
budget/payments:read: Allows reading of payment for budget item.
budget/payments:write: Allows creation of payment in a budget item.
budget/transactions:delete: Allows delete card transactions.
budget/transactions:read: Allows the reading of all card's transactions
budget/transactions:write: Allows creation of card transactions.
bulk/bulk-jobs:read: Allows the reading of bulk job related entities
bulk/bulk-jobs:write: Allows the creation, update and deletion of bulk job related entities
business-transient/bids:read: Allows the reading of Business Transient Bid data
business-transient/proposals:read: Allows the reading of Business Transient Proposal data
business-transient/supplier-brands:read: Allows the reading of a supplier brand or a list of travel supplier brands.
business-transient/supplier-chains:read: Allows the reading of a travel supplier chain or a list of travel supplier
chains.
business-transient/supplier-properties:read: Allows the reading of a travel supplier property or a list of travel
supplier properties.
business-transient/supplier-property-rooms:read: Allows the reading of a list of travel supplier property rooms.
business-transient/travel-accounts:read: Allows the reading of business transient travel account data.
business-transient/travel-program-questions:read: Allows the reading of business transient travel program question
data.
business-transient/travel-programs:read: Allows the reading of business transient travel program data.
business-transient/travel-supplier-accounts:read: Allows the reading of business transient travel supplier account
data.
business-travel/bids:read: Allows the reading of Business Travel Bid data
business-travel/proposals:read: Allows the reading of Business Travel Proposal data
business-travel/travel-accounts:read: Allows the reading of business travel account data.
business-travel/travel-program-questions:read: Allows the reading of business travel program question data.
business-travel/travel-programs:read: Allows the reading of business travel program data.
compliance/communications:read: Allows the reading of communication compliance
compliance/communications:write: Allows the writing of communication compliance
email/bounces:read: Allow the reading of email bounces.
email/email-status:read: Allows the reading of email statuses.
email/emails:read: Allows the reading of emails.
eMarketing/campaigns:read: Allows the reading of campaigns.
emarketing/emarketing-email-status:read: Allows the reading of eMarketing email statuses.
eMarketing/eMarketing-email-templates:read: Allows the reading of email-templates.
eMarketing/eMarketing-send-emails:write: Allows the writing of eMarketing emails.
event/admission-items:read: Allows the reading of admission items
event/air-request:read: Allow reading the air request or air actual detail for attendees.
event/alternate-travel:read: Allow reading the alternate travel answers for attendees.
event/attendance-durations:read: Allows the read of Duration records
event/attendee-activities-metadata:delete: Allows the deletion of attendees activities metadata.
event/attendee-activities-metadata:read: Allows the reading of attendee activities metadata.
event/attendee-activities-metadata:write: Allows the creation/updating of attendees activities metadata.
event/attendee-activities:read: Allows the reading of attendee activities.
event/attendee-activities:write: Allows the writing of external attendee activities.
event/attendee-credits:read: Allows the reading of attendee credits.
event/attendee-links:delete: Allows the deletion of attendee links
event/attendee-links:read: Allows the reading of attendee links
event/attendee-links:write: Allows the creation of attendee links
event/attendee-messages:read: Allows the reading of attendee messages
event/attendees:read: Allows the reading of attendees.
event/attendees:write: Allows the creation of an attendee in an event.
event/audience-segments:read: Allows the reading of audience segments.
event/audience-segments:write: Allows the creation/updating/deletion of audience segments.
event/contact-groups:read: Allows the reading of contact groups.
event/contact-groups:write: Allows the creation/updating of contact groups.
event/contact-types:read: Allows the reading of contact types.
event/contacts:delete: Allows the deletion of contacts.
event/contacts:read: Allows the reading of contacts.
event/contacts:write: Allows the creation/updating of contacts.
event/contacts:write-sensitive: Allows the creation/updating of sensitive data related to contacts.
event/custom-fields:read: Allows the reading of custom fields
event/custom-fields:write: Allows the writing of custom fields
event/discounts:write: Allows the writing of discounts
event/donation-items:read: Allows the reading of donation items.
event/event-discounts:read: Allows the reading of event discounts.
event/event-discounts:write: Allows the writing of event discounts.
event/event-email-status:read: Allows the reading of event email statuses.
event/event-emails:read: Allows the reading of event emails
event/event-emails:write: Allows to send event emails.
event/event-features:read: Allows the reading of events-features
event/event-features:write: Allows updating the event-features
event/event-user-groups:read: Allows the reading of user groups
event/event-user-groups:write: Allows associating/disassociating user groups to event
event/events:read: Allows the reading of events
event/events:write: Allows the creation/updating of events
event/fee-items:read: Allows the reading of fee items.
event/hotel-request:read: Allow reading the hotel request or housing reservation request detail for attendees.
event/invitation-lists:read: Allows the reading of the invitation lists for an event
event/meeting-request-forms:read: Allows the reading of meeting request forms.
event/meeting-requests:read: Allows the reading of meeting requests.
event/meeting-requests:write: Allows the creation/updating of meeting requests.
event/membership-items:read: Allows reading of membership items.
event/orders:read: Allows the reading of orders
event/planning-documents:read: Allows the reading of event planning documents
event/players:read: Allows the reading of players
event/process-form-submissions:read: Allows the reading of process form submissions.
event/program-items:delete: Allows deletion of session program items
event/program-items:read: Allows reading of session program items
event/program-items:write: Allows writing of session program items
event/quantity-items:read: Allows the reading of quantity items.
event/quantity-items:write: Allows the writing of quantity items
event/registration-paths:read: Allows the reading of registration paths
event/registration-types:read: Allows the reading of registration types
event/registration-types:write: Allows the writing of registration types
event/role-assignments:read: Allows the reading of event role assignment.
event/session-attendance:read: Allows the reading of sessions attendance
event/session-attendance:write: Allows the creation/updating of sessions attendance
event/session-categories:read: Allows reading of session categories
event/session-categories:write: Allows writing of session categories
event/session-enrollment:delete: Allows the deletion of session registrations
event/session-enrollment:read: Allows the reading of sessions registrations
event/session-enrollment:write: Allows the writing of sessions registrations
event/session-segments:read: Allows reading of session segments
event/sessions:delete: Allows the deletion of a session in an event
event/sessions:read: Allows the reading of sessions
event/sessions:write: Allows the creation of a session in an event
event/speaker-categories:read: Allows reading of speaker categories
event/speaker-categories:write: Allows writing of speaker categories
event/speakers:delete: Allows the deletion of a speaker in an event
event/speakers:read: Allows the reading of speakers
event/speakers:write: Allows the creation of a speaker in an event
event/taxes:read: Allows the reading of taxes.
event/transactions:read: Allows the reading of transactions
event/transactions:write: Allows the writing of transactions
event/video-views:read: Allows reading of video views.
event/videos:read: Allows the reading of video data.
event/videos:write: Allows the creation/updating of video data.
event/vouchers:read: Allows reading of event vouchers.
event/webcasts:delete: Allows the deletion of webcast
event/webcasts:read: Allows the reading of webcasts
event/webcasts:write: Allows the creation of webcast
event/weblinks:read: Allows the reading of event weblinks
events-plus/hubs:read: Allows the reading of Events+ hub data.
exhibitor/badges:read: Allows reading badges
exhibitor/badges:write: Allows creating/updating badges
exhibitor/booth-staff:delete: Allows deleting booth staff
exhibitor/booth-staff:read: Allows reading booth staff
exhibitor/booth-staff:write: Allows creating booth staff
exhibitor/eliterature-requests:read: Allows reading eliterature document request data
exhibitor/exhibitor-admins:read: Allows reading exhibitor admins
exhibitor/exhibitor-admins:write: Allows creating/updating exhibitor admins
exhibitor/exhibitor-answers:read: Allows reading exhibitor answers
exhibitor/exhibitor-answers:write: Allows updating exhibitor answers
exhibitor/exhibitor-categories:delete: Allows deleting exhibitor categories
exhibitor/exhibitor-categories:read: Allows reading exhibitor categories
exhibitor/exhibitor-categories:write: Allows creating/updating exhibitor categories
exhibitor/exhibitor-contents:delete: Allows deleting exhibitor content
exhibitor/exhibitor-contents:read: Allows reading exhibitor content
exhibitor/exhibitor-contents:write: Allows creating/updating exhibitor content
exhibitor/exhibitor-questions:read: Allows reading exhibitor questions
exhibitor/exhibitors:delete: Allows deleting exhibitors
exhibitor/exhibitors:read: Allows reading exhibitors
exhibitor/exhibitors:write: Allows creating/updating exhibitors
exhibitor/lead-qualification-answers:read: Allows reading Lead Qualification Answers
exhibitor/lead-qualification-questions:read: Allows reading Lead Qualification Questions.
exhibitor/leads:read: Allows reading leads.
exhibitor/registration-packs:delete: Allows deleting registration pack
exhibitor/registration-packs:read: Allows reading registration pack
exhibitor/registration-packs:write: Allows creating/updating registration pack
exhibitor/sponsorship-levels:read: Allows reading sponsorship level
file/file:read: Allows the reading of file
file/file:write: Allows the uploading of file
housing/connections:write: Allows the user to connect to the Reglink APIs.
housing/hotel-room-rates:write: Allows the user to create/update hotel room rates.
housing/housing-event-available-nights:read: Allows the user to read availability information for given event.
housing/housing-event-hotels:read: Allows the user to read information about event hotels.
housing/housing-event-inventory:read: Allows the user to get information about housing event inventory.
housing/housing-event-room-types:read: Allows the user to read information about event room types.
housing/housing-events:read: Allows the user to read information about events.
housing/reservation-requests:delete: Allows the user to cancel reservation request.
housing/reservation-requests:read: Allows the user to read reservation request information.
housing/reservation-requests:write: Allows the user to create/update reservation request.
housing/reservations-link:delete: Allows the user to remove association from reservation.
housing/reservations-link:write: Allows the user to associate reservation to reservation request.
housing/reservations:delete: Allows the user to cancel reservation.
housing/reservations:read: Allows the user to read reservation details information.
housing/reservations:write: Allows the user to create/update reservation.
onsite/signatures:read: Allows reading signatures.
proposal/proposals:write: Allows the creation/writing of proposal
remote-printing/badge-print-jobs:read: Allows reading print jobs.
remote-printing/badge-print-jobs:write: Allows creating print jobs.
remote-printing/badge-printer-pools:read: Allows reading pools.
rfp/rfp-agenda-items:read: Allows the reading of RFP agenda items.
rfp/rfp-attachments:read: Allows the reading of RFP attachments.
rfp/rfp-custom-fields:read: Allows the reading of RFP custom fields.
rfp/rfp-guest-rooms:read: Allows the reading of RFP guest rooms.
rfp/rfp-internal-documents:read: Allows the reading of RFP internal documents.
rfp/rfp-lead-sources:read: Allows the reading of RFP lead sources.
rfp/rfp-past-events:read: Allows the reading of past events similar to rfp event.
rfp/rfp-questions:read: Allows the reading of RFP questions.
rfp/rfp-recipients-history:read: Allows the reading of RFP recipients history.
rfp/rfp-suppliers:read: Allows the reading of RFP suppliers.
rfp/rfps:read: Allows the reading of basic details of RFP.
seating/assignments:read: Allows to read attendee seat assignment information.
seating/event-seatings:read: Allows to read event seating.
seating/seats:read: Allows to read seat information.
seating/tables:read: Allows to read table information.
secure-ecommerce/card-tokens:write: Allows creation of credit card tokens
survey/questions:read: Allows the reading of survey questions
survey/respondents:read: Allows reading the survey respondents
survey/responses:read: Allows reading the survey responses
survey/standard-survey-email-templates:read: Allows reading the standalone survey email templates
survey/standard-survey-email:write: Allows writing operations on standalone survey emails
survey/standard-survey-questions:read: Allows the reading of standalone surveys questions
survey/standard-survey-respondents:read: Allows reading the standalone survey respondents
survey/standard-survey-respondents:write: Allows write operations on standalone survey respondents
survey/standard-survey-responses:read: Allows reading the standalone survey responses
survey/standard-survey-responses:write: Allows write operations on standalone surveys respondent's responses
survey/standard-surveys:read: Allows the reading of standalone surveys
survey/survey-questions:read: Allows the reading of event survey questions
survey/survey-respondents:read: Allows reading the event survey respondents
survey/survey-respondents:write: Allows write operations on the event survey respondents
survey/survey-responses:read: Allows reading the event survey responses
survey/survey-responses:write: Allows write operations on the event surveys respondent's responses
survey/surveys:read: Allows the reading of event surveys
venue/meeting-room-images:delete: Allows disassociating images from meeting rooms.
venue/meeting-room-images:read: Allows retrieving meeting room images.
venue/meeting-room-images:write: Allows associating images with meeting rooms.
venue/meeting-room-overviews:read: Allows read access for overview of meeting room.
venue/meeting-rooms:write: Allows the creation and modification of meeting rooms.
venue/venue-details-overview:read: Allows read access for overview of venue details.
venue/venue-details:write: Allows the creation and modification of venue details.
venue/venue-facility:write: Allows the modification of venue facility information.
OAuth2.authorizationCode:
type: oauth2
description: OAuth2 Authorization Code Flow.
flows:
authorizationCode:
authorizationUrl: https://api-platform.cvent.com/ea/oauth2/authorize
tokenUrl: https://api-platform.cvent.com/ea/oauth2/token
scopes:
account/hooks:delete: Allows the deletion of hooks.
account/hooks:read: Allows the reading of hooks.
account/hooks:write: Allows the creation/updation of hooks.
account/user-groups:delete: Allows deletion for user groups
account/user-groups:read: Allows the reading of user groups
account/user-groups:write: Allows the writing of user groups
account/users:delete: Allows the deletion of User
account/users:read: Allows the reading of User, User Group
account/users:write: Allows the creation/updating of User
appointments/appointment-attendees:read: Allows the reading of appointment attendees and their related entities.
appointments/appointment-events:read:
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# Full source: https://raw.githubusercontent.com/api-evangelist/cvent/refs/heads/main/openapi/cvent-attendee-messages-api-openapi.yml