> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.jambonz.org/reference/websocket-api/call-control/ack/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.jambonz.org/_mcp/server.

# ack

> > websocket server => jambonz

An `ack` message is sent by the websocket server to jambonz in response to a `session:new` or `verb:hook` message.  The ack message may optionally contain a payload of new instructions for jambonz to execute.

| property | type         | meaning                                    | required |
| -------- | ------------ | ------------------------------------------ | -------- |
| type     | string "ack" | indicates this is an ack message           | yes      |
| msgid    | string       | references the message this is in reply to | yes      |
| data     | array        | array of jambonz verbs to execute          | no       |

```json
{
  "type": "ack",
  "msgid": "1cvh3MNHh1xrJaHmnitqA1",
  "data": [
    {
      "text": "Hi there and welcome!",
      "verb": "say"
    }
  ]
}
```