Gmail Triage Workflow: Claude Replies + Slack Priority Logs (n8n)

Turn new Gmail email triage into instant, prioritized action—without manual sorting

This Gmail Triage Workflow (n8n) automatically checks your inbox every minute, uses Anthropic Claude to classify and summarize incoming emails, then routes results to Gmail drafts, Slack priority alerts, Airtable tasks, and Google Sheets logs. Promotional emails are labeled and archived automatically—keeping your inbox clean and your team aligned.

What this workflow does

• Monitors Gmail for new incoming messages by polling every minute.
• Extracts key fields including message ID, thread ID, sender, subject, body, and received date.
• Optional deduplication via an external HTTP endpoint to avoid re-processing the same message.
• Calls Anthropic Claude to return a JSON classification and outputs such as:
  • Priority category: Urgent / Important / Normal / Promotional
  • Summary, action items, response requirement, and sentiment
• Handles Promotional emails by applying labels, archiving them, and logging them to a dedicated Google Sheets tab.
• Creates Claude-based Gmail replies for Urgent, Important, and Normal emails and saves them as drafts in the original thread.
• Drives team follow-up for non-Normal messages by sending a Slack alert and creating an Airtable task; Normal emails are logged to Google Sheets.
• Marks processed messages by calling an external endpoint for future deduplication.

Use cases

• SaaS support teams who need fast triage and draft responses from inbound customer emails.
• Operators monitoring sales or partnership outreach without drowning in promotional volume.
• Automation engineers who want consistent priority logging across Gmail, Slack, Airtable, and Google Sheets.

Technical details

• n8n nodes/tools: Gmail, Slack, Airtable, Google Sheets, if, set, code, switch.
• Anthropic Claude integration: HTTP header credentials using x-api-key, anthropic-version, and content-type.
• Deduplication: optional Supabase/Airtable-style HTTP endpoint to mark processed messages.

Includes setup steps for Gmail OAuth2, Anthropic API key, Slack OAuth2, and the required channel IDs.