Create a HubSpot deal when a cold email reply is marked Interested

When AI labels a reply Interested, Master Inbox creates or updates the HubSpot contact and company, opens a deal and attaches the conversation. Only real interest reaches your CRM, not every cold contact.

CRM sync

HubSpot

Instantly

Smartlead

EmailBisonRevOpsSDR managerRevenue plan

When

Add LabelInterested, Meeting Request or Information Request

Then

Sync to HubSpotUpsert contact and company, create a deal, attach the thread

Why teams run it

Keeps HubSpot clean: records are created only when a prospect shows interest, with the whole reply chain attached for the AE.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Create a HubSpot deal when a cold email reply is marked Interested.
Set the trigger to Add Label and choose Interested, Meeting Request or Information Request.
Add the action Sync to HubSpot: Upsert contact and company, create a deal, attach the thread.
Save the workflow and switch it to Active.

Before you start, connect HubSpot 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": "Create a HubSpot deal when a cold email reply is marked Interested",
  "trigger_type": "add_label",
  "trigger_config": {
    "label_ids": [
      176479
    ]
  },
  "action_configs": [
    {
      "action_type": "sync_to_hubspot"
    }
  ]
}'

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 HubSpot deal when a cold email reply is marked Interested". 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 every cold contact get pushed to HubSpot?

No. The workflow only runs when the label is added, so only prospects who reply with interest become HubSpot records.

Can I map labels to deal stages?

Yes. In the HubSpot integration settings you choose which labels create deals and which stage each label maps to.

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.