> For the complete documentation index, see [llms.txt](https://docs.innopaas.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.innopaas.com/api-reference/api-reference-en/whatsapp-business-api/webhook/chatroom-inbound-and-outbound-message-events.md).

# Chatroom inbound and outbound message events

Chatroom inbound and outbound messages are only for event listening in the chatroom,**chat\_mt\_message\_notify (chatroom downstream message reception), chat\_mo\_message\_notify (chatroom upstream message reception)**

| Field          | Data type | Required | Description                                                      |
| -------------- | --------- | -------- | ---------------------------------------------------------------- |
| wabaId         | String    | Yes      | Waba Id                                                          |
| from           | String    | Yes      | Enterprise Sender                                                |
| to             | String    | Yes      | User WhatsApp number                                             |
| messageType    | String    | Yes      | Message type                                                     |
| context        | Object    | Yes      | Message content                                                  |
| wamid          | String    | No       | Meta message ID                                                  |
| conversationId | String    | No       | Conversation ID (InnoPaaS chatroom conversation ID)              |
| uid            | String    | No       | User-defined ID                                                  |
| sendTime       | String    | Yes      | Send time, UTC, e.g.: 2026-07-09T09:11:23.405Z                   |
| sendTimestamp  | String    | Yes      | Send timestamp, accurate to the millisecond, e.g.: 1783588283405 |

**chat\_mt\_message\_notify example**

```json
{
    "id": "b5e984b3-21b2-42a9-b08b-72e5a4096ac6",
    "type": "chat_mt_message_notify",
    "eventTime": "2023-02-22T12:00:00.000Z",
    "body": {
        "wabaId": "WHATSAPP_BUSINESS_ACCOUNT_ID",
        "from": "wamid.BgNODYxN...",
        "to": "PHONE-NUMBER",
         "messageType": "text",
         "context": {
             "text":"this is test message"
           },
        "wamid": "wamid.BgNODYxN...",
        "conversationId": "12312312312312",
        "uid":"123123123123123213123",
         "sendTime":"2026-07-09T09:11:23.405Z", 
         "sendTimestamp":"1783588283405"
    }
}
```

**chat\_mo\_message\_notify example**

```json
{
    "id": "b5e984b3-21b2-42a9-b08b-72e5a4096ac6",
    "type": "chat_mo_message_notify",
    "eventTime": "2023-02-22T12:00:00.000Z",
    "body": {
        "wabaId": "WHATSAPP_BUSINESS_ACCOUNT_ID",
        "from": "wamid.BgNODYxN...",
        "to": "PHONE-NUMBER",
         "messageType": "text",
         "context": {
             "text":"this is test message"
           },
        "wamid": "wamid.BgNODYxN...",
        "conversationId": "12312312312312",
        "uid":"123123123123123213123",
         "sendTime":"2026-07-09T09:11:23.405Z", 
         "sendTimestamp":"1783588283405"
    }
}
```