n8n Meta Audience Network Wasted Spend Leak Report (API + Claude + Gmail)

Stop Meta Audience Network wasted spend—get an automated leak report via Gmail

This n8n workflow analyzes your Meta Ads placement performance, identifies underperforming Audience Network slices using spend and CPA benchmarks, and then produces a prioritized action plan using Claude—delivered automatically as a plain-text wasted spend leak report by Gmail.

What this workflow does

• Runs on demand (Manual Trigger) to start the analysis.
• Pulls the last 30 days of Meta Marketing API account insights broken down by publisher platform and platform position.
• Computes a non–Audience Network cost-per-result benchmark from your other placements.
• Flags Audience Network placements with zero results or CPA far above the benchmark, and estimates recoverable spend.
• Sends the flagged list plus benchmark context to Anthropic Claude to generate a prioritized JSON action plan (actions like exclude, keep, or investigate).
• Formats Claude’s output into a readable Audience Network leak report and emails it via Gmail.

Use cases

• SaaS growth teams reviewing Meta placements weekly to quickly isolate wasted Audience Network traffic.
• Automation engineers building reporting that turns Meta Ads data into an actionable leak analysis without manual spreadsheets.
• Operators tuning CPA thresholds and deciding which publisher slices to exclude or investigate to protect ROAS.

Technical details

• n8n workflow using nodes: Code, HTTP Request, Manual Trigger, Gmail, and a Sticky Note.
• Environment variables: META_ACCESS_TOKEN, META_AD_ACCOUNT_ID, and optionally META_API_VERSION.
• Anthropic setup via ANTHROPIC_API_KEY.
• Configure Gmail credentials, recipients, and subject in the Gmail Send node.
• Adjust thresholds and RESULT_ACTIONS to match your conversion events and acceptable Audience Network performance.