Electricity Bill Anomaly Checker with OpenAI, Sheets & SendGrid

Detect electricity bill anomalies automatically—validated by OpenAI and scored against your last 12 months

The Electricity Bill Anomaly Checker with OpenAI, Sheets & SendGrid workflow takes each electricity bill submission, extracts and validates key fields with OpenAI, compares usage to your Google Sheets history, and generates a clear advisory report. If an anomaly is high-severity, it escalates via SendGrid after a 24-hour wait.

What this workflow does

• Ingest bills via a POST webhook or on a monthly cron schedule to recheck submitted bills.
• Validate and normalize bill data using OpenAI to extract key fields (billing period, units consumed, bill amount, and tariff category). Invalid submissions are rejected with an error response.
• Pull billing history from your Google Sheets “BillsLog” sheet and analyze up to the most recent 12 months in Python.
• Compute a weighted anomaly score and severity based on consumption patterns.
• Generate an advisory report with OpenAI using plain language and recommended next steps.
• Log results to Google Sheets: immediate reporting is returned for normal/moderate cases, and outcomes are appended for records.
• Escalate high-severity cases: respond with an “escalation pending” message, wait 24 hours (resume webhook available), then send a support alert via SendGrid and log the escalated case in Sheets.

Use cases

• Proactively monitor customer or household electricity usage for unusual spikes or billing discrepancies.
• Automate monthly review of electricity bills with consistent validation and anomaly scoring.
• Support teams receive timely escalations for high-severity cases without manual investigation.

Technical details

• OpenAI: extraction/validation of bill fields and advisory generation.
• Google Sheets: read from “BillsLog” and append Normal/Moderate and escalated High cases.
• SendGrid: send support alert emails for high-severity anomalies.
• n8n nodes/utilities used include: webhook, if, set, code, wait, and sticky note.

Perfect for n8n automation engineers and SaaS operators who want reliable electricity bill anomaly detection with OpenAI + Sheets and controlled escalation workflows.