Send Slack reply alerts on weekdays only
Positive reply alerts post to Slack Monday to Friday in your workspace time zone. Weekend replies wait in the inbox instead of pinging the team on a Saturday.

Why teams run it
Keeps alerts useful and quiet on weekends, so the channel is trusted when it does ping.
Set it up in Master Inbox
- In Master Inbox, open Settings, then Workflows, and click Add a workflow.
- Name it Send Slack reply alerts on weekdays only.
- Set the trigger to Incoming Message and choose All channels.
- Add a condition: Label sentiment is positive.
- Add a condition: Day is Monday to Friday.
- Add the action Notify in Slack: Post the reply, prospect and thread link to #sales.
- Save the workflow and switch it to Active.
Before you start, connect Slack under Settings, Integrations.
Or create it with the API
Everything in the workflow builder is also in the Master Inbox API. This request creates the same workflow. Replace the example ids with your own label, list and campaign ids from GET /workflows/filter-fields. This workflow also uses conditions: add them under trigger_config.conditions, as shown on the conditions page.
curl -X POST https://api.masterinbox.com/api/api-webhook/v1/api/workflows/create-workflow \
-H "Authorization: Bearer $MASTER_INBOX_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"name": "Send Slack reply alerts on weekdays only",
"trigger_type": "incoming_message",
"trigger_config": {
"channel_ids": [
"-1"
]
},
"action_configs": [
{
"action_type": "slack_notify",
"payload_variables": [
"name",
"company_name",
"label_names",
"text",
"thread_url"
],
"show_draft": true
}
]
}'Full reference: workflow API guide and API docs.
Or ask Claude, ChatGPT or Grok to build it
Our workflow guide is written for AI agents to read. Give your assistant your API key and this prompt:
Read https://app.masterinbox.com/public-workflow-api.md and use my Master Inbox API key to create this workflow: "Send Slack reply alerts on weekdays only". First call GET /workflows/filter-fields and look up my label, list and channel ids, then create the workflow and tell me what you set up.Questions
Which time zone does the day condition use?
The workspace time zone set in Master Inbox.
Can weekend replies still reach someone?
Yes. Add a second workflow with Day set to Saturday and Sunday that emails the on-call rep.
Can I build this workflow through the API?
Yes. Send the create-workflow request shown on this page with your Master Inbox API key. The API checks the payload first and lists every problem by field if anything is off.
Which plan includes this?
This workflow works on the Team plan. Every plan has unlimited users and starts with a free 7-day POC.
Learn more
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Run this on your own inboxes
Free 7-day POC. Unlimited users on every plan.
