Create a Close call task when an interested lead goes quiet for 24 hours

24 hours after a rep replies to an interested lead, if the prospect has not answered, a webhook tells Zapier or n8n to create a Close call task and the thread gets a Call task label.

Calling

Zapier

n8nSDR 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 labelsCall task

And

Send a webhookSend the lead, phone and thread URL to Zapier or n8n, which creates the Close call task

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 Create a Close call task when an interested lead goes 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: Call task.
Add the action Send a webhook: Send the lead, phone and thread URL to Zapier or n8n, which creates the Close call task.
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": "Create a Close call task when an interested lead goes quiet for 24 hours",
  "trigger_type": "send_message",
  "trigger_config": {
    "channel_ids": [
      "-1"
    ]
  },
  "action_configs": [
    {
      "action_type": "add_labels",
      "label_ids": [
        176480
      ]
    },
    {
      "action_type": "webhook",
      "webhook_url": "https://hooks.example.com/master-inbox",
      "webhook_payload_variables": [
        "name",
        "email",
        "company_name",
        "label_names",
        "thread_url",
        "text"
      ]
    }
  ]
}'

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: "Create a Close call task when an interested lead goes 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

Does Close have native workflow actions?

Yes. The workflow builder in the app has Close actions for Create Task, Update Opportunity and Remove from Workflow. They are app only, so the API version of this recipe uses a webhook.

Do the email follow-ups keep going?

Yes. If the call is not answered, your follow-ups continue as before.

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 starts with a free 7-day POC.