{"product_id":"n8n-workflow-approve-dcim-power-overage-via-gmail-sheets-openai","title":"n8n Workflow: Approve DCIM Power Overage via Gmail + Sheets + OpenAI","description":"\u003ch3\u003eAutomatically approve DCIM power overage charges—powered by Gmail, Google Sheets, and OpenAI\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow receives DCIM rack power alerts, calculates tiered kW overage charges from your Google Sheets contract allocations, drafts a factual invoice line-item explanation with OpenAI, and sends it to an ops manager for approval via Gmail—before posting the final charge to your billing API and logging outcomes to Sheets, Data Tables, and Telegram.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003eReceives DCIM power alerts\u003c\/b\u003e via a webhook \u003ccode\u003ePOST\u003c\/code\u003e (path: \u003ccode\u003e\/dcim-power-alert\u003c\/code\u003e) containing \u003ccode\u003ecustomerId\u003c\/code\u003e, \u003ccode\u003erackId\u003c\/code\u003e, and measured power usage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eLooks up contracted kW allocation\u003c\/b\u003e in Google Sheets (the \u003cb\u003eColocation Contract Ledger\u003c\/b\u003e spreadsheet).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eCalculates overage\u003c\/b\u003e by determining overage kW, applying a \u003cb\u003e5% grace band\u003c\/b\u003e, then computing a \u003cb\u003etiered overage amount and rate\u003c\/b\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eHandles non-billable usage\u003c\/b\u003e by recording a no-charge outcome and continuing centralized logging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eGenerates a charge explanation\u003c\/b\u003e with \u003cb\u003eOpenAI\u003c\/b\u003e for factual invoice line-item wording when usage is billable.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eRoutes for approval in Gmail\u003c\/b\u003e with \u003cb\u003eapprove\/edit\/reject\u003c\/b\u003e options sent to an ops manager.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eApplies the final decision\u003c\/b\u003e: on approval, posts the charge to the billing API; on edit, applies the override amount; on rejection, logs a waiver and emails the customer that no charge applies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eLogs every outcome\u003c\/b\u003e to an n8n \u003cb\u003eData Table\u003c\/b\u003e and a Google Sheets ledger, and notifies finance via \u003cb\u003eTelegram\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eColocation and data center teams automating power overage billing workflows from DCIM alerts.\u003c\/li\u003e\n  \u003cli\u003eSaaS operators standardizing invoicing logic with tiered pricing and a grace threshold.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers implementing an approval gate for billing changes using Gmail.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cb\u003eWebhook ingestion\u003c\/b\u003e + payload normalization (n8n nodes: if, set, code, merge, switch).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eGoogle Sheets\u003c\/b\u003e integration for kW allocation lookup and ledger logging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eOpenAI\u003c\/b\u003e for drafting factual invoice line-item explanations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eGmail\u003c\/b\u003e for approval workflows (approve\/edit\/reject).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cb\u003eBilling API posting\u003c\/b\u003e after approval\/edit, with final logging to \u003cb\u003eData Tables\u003c\/b\u003e and \u003cb\u003eTelegram\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSetup tip:\u003c\/b\u003e Configure your DCIM\/power monitoring system to send POST alerts to the workflow’s webhook URL at \u003ccode\u003e\/dcim-power-alert\u003c\/code\u003e, and add Google Sheets OAuth credentials for the “Colocation Contract Ledger” spreadsheet.\u003c\/p\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":46001860804787,"sku":"N8N-19462","price":55.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/Zjj5jQqJGGgsTM-Fgn0lA_TCy5WSHO.png?v=1789117822","url":"https:\/\/buyflowscripts.com\/products\/n8n-workflow-approve-dcim-power-overage-via-gmail-sheets-openai","provider":"N8N Commerce","version":"1.0","type":"link"}