Message sent

The message:send event fires after a message is successfully sent and accepted by Nexconn, regardless of channel type. Use this event for real-time message archiving, analytics, or downstream integrations.

For the complete webhook setup and signature verification guide, see Webhooks overview.

Event type

message:send

Payload

Envelope

Field	Type	Required	Description
type	String	Yes	"message:send"
id	String	Yes	Unique event ID.
time	Long	Yes	Event generation time (Unix ms).
data	Array	Yes	Array containing one message object. See Data fields.

Data fields

Field	Type	Required	Description
userId	String	Yes	The sender's user ID.
channelId	String	Yes	Target ID: the recipient user ID (direct), group ID, open channel ID, or community channel ID.
messageType	String	Yes	Message type identifier (e.g., RC:TxtMsg, RC:ImgMsg). See the message type documentation.
content	String	Yes	Message content body. Structure varies by messageType.
channelType	Number	Yes	Channel type. See Channel types.
time	Long	Yes	Time the server received the message (Unix ms).
messageId	String	Yes	Unique message identifier.
os	String	Yes	Sender's platform. One of: iOS, Android, Websocket, Server.
originalMessageId	String	No	Original message ID. Only present in community channels when a message is updated, its metadata is changed, or it is deleted.
profanityType	Int	No	Profanity detection result. 0 = none. 1 = blocked. 2 = replaced.
busChannelId	String	No	Subchannel ID. Only present in community channels.
groupUserIds	String[]	No	Recipient user ID array for targeted group messages. Only present for directed group messages.
aiGenerated	Boolean	No	Whether the message was generated by AI. Only returned when the feature is enabled for your app.

Example

JSON

{
  "type": "message:send",
  "id": "550e8400-e29b-41d4-a716-446655440007",
  "time": 1730192400000,
  "data": [
    {
      "userId": "user_001",
      "channelId": "group_001",
      "messageType": "RC:TxtMsg",
      "content": "{\"content\":\"Hello\",\"extra\":\"\"}",
      "channelType": 3,
      "time": 1730192400000,
      "messageId": "msg_xyz789",
      "profanityType": 0,
      "os": "iOS"
    }
  ]
}