Stream every reply into Supabase or your data warehouse

A workflow on every incoming message sends the reply text, prospect, labels, campaign and thread link to your endpoint, so Supabase, Postgres or your warehouse holds a copy of every reply.

Data outRevOpsTeam plan

When

Incoming MessageAll channels

Then

Send a webhookSend the reply text, email, company, label names, campaign and thread URL to your Supabase function or warehouse endpoint

Why teams run it

Your own dashboards, dedupe and models run on a single source of replies across every sequencer.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Stream every reply into Supabase or your data warehouse.
Set the trigger to Incoming Message and choose All channels.
Add the action Send a webhook: Send the reply text, email, company, label names, campaign and thread URL to your Supabase function or warehouse endpoint.
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": "Stream every reply into Supabase or your data warehouse",
  "trigger_type": "incoming_message",
  "trigger_config": {
    "channel_ids": [
      "-1"
    ]
  },
  "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: "Stream every reply into Supabase or your data warehouse". 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

Are spam folder replies included?

Replies the mail provider marks as spam or junk are skipped by default. You can turn them on per workspace.

Can I get outbound messages too?

Yes. Add a second workflow on the Sending Message trigger, or use the message webhook with both directions on.

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.