Review AI Ad Copy with Claude: HubSpot + Slack (n8n)

Review AI Ad Copy with Claude (HubSpot + Slack) — Automatically route every variant

Stop manually vetting AI-written ad copy. This n8n workflow receives ad variants via webhook, validates and deduplicates them, then uses Anthropic Claude to approve, review, or block each variant—while creating a HubSpot task and sending a Slack alert in live mode.

What this workflow does

• Webhook intake with header authentication: The workflow receives an ad variant and campaign context through a secured webhook.
• Validation + normalization: Required fields are checked and upstream quality checks are applied; invalid requests are rejected with an HTTP 422.
• Deduplication via n8n Data Table: It prevents reprocessing the same brief + variant combination and returns a “duplicate” response when found.
• Claude-based routing decision: The variant and campaign context are sent to Anthropic Claude to return a strict JSON routing decision. If the AI output is unusable, the workflow falls back to deterministic rules.
• Live-mode actions: Based on the decision and priority, it creates a HubSpot task and posts a formatted Slack message to the appropriate channel.
• Outcome logging + response: Results—including AI/fallback status, costs, latency, and delivery outcomes—are logged to an n8n Data Table, and the webhook caller is responded to.
• Daily insights + reporting: On a schedule (or manual run), it reads the last 24 hours from the Data Table, uses Claude to generate insights, then sends an HTML report via Gmail, posts a Slack digest, and appends decision rows to Google Sheets.

Use cases

• Marketing ops teams routing AI ad copy for compliance, brand fit, or performance strategy.
• SaaS operators reviewing variant approvals at scale with consistent decision logging.
• Automation engineers building an AI governance gate between generation and execution.

Technical details

• Core nodes: webhook, if, set, code, data table, gmail
• Integrations: Anthropic Claude for JSON routing decisions, HubSpot for task creation, Slack for alerts/digests, and Google Sheets for reporting rows.