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n8n canvas: 30-minute schedule, open tickets from Airtable, find late tickets in code and Slack alert
Price
Free
Difficulty
Intermediate
Updated
November 6, 2026

Overview

Every 30 minutes the workflow reads the open tickets from an Airtable table. A short code step compares each ticket's created time with the response limit for its priority: one hour for urgent, four for high, eight for normal and 24 for low.

Tickets past their limit are listed in one Slack message for the support lead. When nothing is late, the workflow stops quietly, so the channel only hears about real problems.

Useful for

  • Catch urgent tickets before a customer has to chase
  • Give the support lead one list to act on each half hour
  • Adjust response limits to match your own support promise

What's included

  • An n8n workflow with 4 nodes, ready to import
  • Trigger: Every 30 minutes
  • Connects Airtable, Slack
  • Sticky notes on the canvas that explain what to set up
  • No credentials inside: you connect your own accounts

How to use it

  1. 1

    Download the workflow JSON.

  2. 2

    In n8n, create a workflow, open the … menu, choose Import from File and select the JSON.

  3. 3

    Connect Airtable and Slack, and pick your base, table and channel.

  4. 4

    Check the response limits in the Find late tickets code and change them to your own.

  5. 5

    Click Execute workflow to test, then activate.

What you need

Requirements

  • An n8n instance (cloud or self-hosted, version 1.x)
  • An Airtable base with Subject, Priority, Created and Status fields, and a Slack workspace

Works with

  • n8n 1.x (cloud or self-hosted)

Questions

Is this n8n workflow free?

Yes. Download the JSON and import it into your own n8n. There is no sign-up and no cost.

Does it include any credentials?

No. The file has no keys or tokens. Connect your own Airtable and Slack accounts after importing.

Can I post to a person instead of a channel?

Yes. On Alert support lead, choose a direct message to the support lead instead of a channel.

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  • #sla-breach-alert
  • #n8n
  • #automation
  • #workflow-template
  • #free-template

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