On Slack's incoming webhook documentation, they mention including the thread_ts in the request body to start a thread.

{ "text": "Hello, world.", "thread_ts": "12345.6789"
}

When I make the POST request to my incoming webhook url, the response body does not include the thread_ts. I was expecting the thread_ts to be in the response body, but the response body just says ok and does not include any json.

Is it possible to get the thread_ts without another app or authentication token? Do I have to use another Slack API? I only have the incoming webhook configured right now.

---

As a side note, if this is easier to do with Slack's new Block Kit API, that would work as well.

3 Answers

To take full control of all messaging features of Slack including threads you want to use the API.

When posting messages with chat.postMessage you get the thread_ts value and can start creating threads.

Also check out this official documentation on threads. It clears up a lot.

I am not an export on the new blocks yet, but as far as I understand it replaced the attachments and provides a more flexible way for message layouts. It does however not change the way threading works.

2

from slack_sdk import WebClient
slack_client = WebClient(token='token_value')
response = slack_client.chat_postMessage(channel=receiver, text=message)
print(response.data)
thread_ts = response.data['ts']

1

In case of Bolt api (js) you can check ts value from callback arguments.

app.message( "link please", async ({ message, say }) => { // You can also get ts from `payload` console.log(message); await say({ text: "you can check this link", thread_ts: message.ts, // you can get ts from message }); });

message content:

{ client_msg_id: 'xxxxx', type: 'message', text: 'xxxx', user: 'UxxR', ts: '1650249299.335499', team: 'xxxx', blocks: [ { type: 'rich_text', block_id: 'adOR', elements: [Array] } ], thread_ts: '1650249116.347219', parent_user_id: 'UxxxxxR', channel: 'C01TNEN8SSK', event_ts: '1650249299.335499', channel_type: 'group'
}

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