Flag interested Close leads that go quiet for 24 hours

Conversations sync to Close natively. When an interested lead has not replied in 24 hours, a workflow labels the thread Going cold and sets a reminder, and the label syncs to Close so the rep sees it in both places.

Calling

CloseSDR managerRevenue plan

When

Sending MessageYour reply, 24 hours after it is sent

Only if

Label is Interested

Only if

Last message is from your team

Then

Add labelsGoing cold

And

Set a remindertomorrow morning for the owner

Why teams run it

Nobody has to remember to call: the task appears when email goes quiet.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Flag interested Close leads that go quiet for 24 hours.
Set the trigger to Sending Message and choose Your reply, 24 hours after it is sent.
Add a condition: Label is Interested.
Add a condition: Last message is from your team.
Add the action Add labels: Going cold.
Add the action Set a reminder: tomorrow morning for the owner.
Save the workflow and switch it to Active.

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": "Flag interested Close leads that go quiet for 24 hours",
  "trigger_type": "send_message",
  "trigger_config": {
    "channel_ids": [
      "-1"
    ]
  },
  "action_configs": [
    {
      "action_type": "add_labels",
      "label_ids": [
        176480
      ]
    },
    {
      "action_type": "set_reminder",
      "reminder_minutes": 960
    }
  ]
}'

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: "Flag interested Close leads that go quiet for 24 hours". 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

Do I need Zapier or n8n for Close?

No. Close is a native integration on the Revenue plan that syncs leads and conversations. This workflow only adds the label and the reminder.

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 Revenue plan. Every plan has unlimited users, and pricing is shared on a short call.