Work
Automate the invoice line review you would never do by hand
Line-by-line vendor invoices are too tedious to start.
What hurt
Dan (KettlebellDan) noticed Grok Bot is not only good at monotonous work you already do — it can take tasks so tedious you would never start them. His example: reviewing every line item on a vendor invoice for accuracy. By hand it takes forever and you often catch nothing, so people skip it. With Grok Bot you can send the job off, and even hang it on a routine when the invoice backup arrives. He argues the money it catches easily pays for the bot.
What to install or create
One auditor bot. Connect the inbox (or folder) where invoice PDFs land. Paste a clear review ask: check line items against the PO / contract / last bill, flag mismatches, never pay or email the vendor without a yes. First week: run on demand when a backup arrives. Then turn it into a routine on new attachments.
Bots
Invoice auditor
Reviews vendor invoice line items when a backup arrives. Flags mismatches. Does not pay.
Plugins
Gmail
Optional
Files
Vendor invoice PDF / backup attachment, plus the matching PO or last bill if you have it.
Routines
When a new invoice backup lands in a watched label/folder, run the auditor. Still stop before pay or send.
The prompt
Paste when an invoice backup arrives
Curated from KettlebellDan’s published example (vendor invoice line review as a routine). Not a full system prompt he pasted.
Last line is our approval fence: Never send, post, spend, or buy without my explicit yes.
Review this vendor invoice line by line. - Compare each line to the PO, contract, or last bill when available. - Flag quantity, rate, tax, duplicate, and description mismatches. - Summarize what looks fine vs what needs a human look. - Do not pay, dispute, or email the vendor. Stop for my yes before any outbound action. Never send, post, spend, or buy without my explicit yes.
First run
- 1Read https://x.com/KettlebellDan/status/2094855228302778816 for the tedious-task framing.
- 2Create an Invoice auditor bot. Connect Gmail (or the folder where invoice backups land).
- 3Drop one real invoice PDF and paste the line-item-audit ask. Review flags only.
- 4If the flags look sane, hang a routine on new attachments in that label/folder.
- 5Keep pay / dispute / vendor email behind your yes every time.
Approval fence
Never pay, dispute, or email the vendor without your explicit yes. Flags only until you say otherwise.
What to tweak
Steal the bar: automate the review you skip because it never felt worth it. Catch errors; do not auto-pay.
Source
Dan @KettlebellDan · Original post
Not affiliated with xAI. We did not write this prompt. Third-party template terms still apply.