Send positive replies straight to your own lead API

When a reply is labeled positive, a webhook posts the reply text, campaign, sender, subject and a stable job id to your internal lead endpoint, which dedupes and routes it.

Data out

HubSpot

Clay

ZapierRevOpsTeam plan

When

Add LabelInterested, Meeting request or Information request

Then

Send a webhookSend the reply text, email, campaign, from address, subject and job id to your internal lead API

Why teams run it

One direct call replaces a chain of tools where any link can fail silently.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Send positive replies straight to your own lead API.
Set the trigger to Add Label and choose Interested, Meeting request or Information request.
Add the action Send a webhook: Send the reply text, email, campaign, from address, subject and job id to your internal lead API.
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.

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 positive replies straight to your own lead API",
  "trigger_type": "add_label",
  "trigger_config": {
    "label_ids": [
      176479
    ]
  },
  "action_configs": [
    {
      "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: "Send positive replies straight to your own lead API". 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

How do I dedupe repeat replies?

Use the prospect id and job id in the payload, and count one qualified lead per person per period on your side.

Can I keep a Slack fallback?

Yes. Add a Notify in Slack action to the same workflow.

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.