n8n Lead Scoring Workflow: Claude + Google Sheets + Slack

Instant lead scoring + logging + Slack alerts (Claude + Google Sheets)

This n8n lead scoring workflow automatically scores new leads with Anthropic Claude, logs every submission to Google Sheets, and sends a Slack notification whenever a lead is classified as HOT (score ≥ 70).

What this workflow does

• Receives leads via webhook: Listens for a POST request containing name, email, source, and message.
• Scores and qualifies with Claude: Sends the lead details to the Anthropic Claude node to extract a structured qualification result, including score, intent, budget and timeline signals, reasoning, and a suggested next step.
• Assigns a tier (HOT/WARM/COLD): Merges the original lead fields with Claude’s extracted results and determines the tier based on the score (HOT when score ≥ 70).
• Tracks in Google Sheets: Appends every scored lead to a sheet/tab named Leads (columns: Name, Email, Source, Score, Tier, Intent, NextStep, Message).
• Alerts in Slack for HOT leads: Posts a detailed message to a selected Slack channel when the lead tier is HOT.
• Returns a JSON response: Confirms receipt and includes the assigned tier to the webhook caller.

Use cases

• SaaS teams that want real-time lead qualification from web forms or in-app chat submissions.
• Automation engineers building a lead routing pipeline without manual triage.
• Operations workflows that need auditable tracking in Google Sheets alongside instant HOT alerts in Slack.

Technical details (n8n nodes and integrations)

• webhook to receive incoming lead data
• Anthropic Claude (Anthropic API credential + chosen Claude model) to generate qualification results
• if logic to detect HOT leads (score ≥ 70)
• code for tier assignment and result merging
• google sheets OAuth to append results to the Leads tab
• slack to post HOT lead notifications to your selected channel
• sticky note for workflow guidance