Resume the Smartlead campaign when a prospect cancels the meeting

When a prospect cancels on Cal.com or Calendly, Master Inbox resumes them in the Smartlead campaign and swaps the Meeting booked label for Rebook, so the cadence picks up where it stopped.

Meetings

Smartlead

Cal.com

CalendlySDR managerRevOpsTeam plan

When

Meeting CancelledFrom Cal.com or Calendly

Then

Resume in SmartleadResume the lead in the campaign

And

Replace labelsRebook

Why teams run it

Cancelled meetings stop falling into a gap between the calendar and the sequencer.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Resume the Smartlead campaign when a prospect cancels the meeting.
Set the trigger to Meeting Cancelled and choose From Cal.com or Calendly.
Add the action Resume in Smartlead: Resume the lead in the campaign.
Add the action Replace labels: Rebook.
Save the workflow and switch it to Active.

Before you start, connect Smartlead, Cal.com or Calendly 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.

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": "Resume the Smartlead campaign when a prospect cancels the meeting",
  "trigger_type": "meeting_cancelled",
  "trigger_config": {},
  "action_configs": [
    {
      "action_type": "resume_from_campaign_smartlead",
      "campaign_ids": [
        "camp-1"
      ]
    },
    {
      "action_type": "update_labels",
      "label_ids": [
        176480
      ]
    }
  ]
}'

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: "Resume the Smartlead campaign when a prospect cancels the meeting". 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 this pair with the pause workflow?

Yes. Pause on Meeting Booked, resume on Meeting Cancelled.

What if the prospect rebooks?

The Meeting Booked workflow pauses them again.

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.