INVOICE PROCESSING
Flag Silent Vendor Invoice Increases from Gmail Inbox
Watches your billing inbox for incoming vendor invoices, extracts the amount, compares it to that vendor's last invoice.
How it runs
The automated pipeline, trigger to output.
- TriggerNew invoice email in GmailGmail
- ActionExtract vendor and amount with OpenAIOpenAI
- ActionLook up vendor's last amount in AirtableAirtable
- LogicCompute percent change vs threshold
- ActionUpdate Airtable ledger with new amountAirtable
- OutputPost flagged increase to Slack review channelSlack
What it does
This workflow catches vendors who quietly raise their recurring charges. Each time an invoice email arrives, it pulls out the vendor name and amount, looks up the previous amount you paid that vendor, and computes the change. If the new amount is higher than your tolerance (default 3%), it posts a flagged alert to a review channel so the increase never slips through unnoticed.
When to use it
Use it when you receive vendor invoices by email and want a human to approve any price hike before it gets paid. Ideal for finance ops teams managing dozens of SaaS and service subscriptions where small recurring creep adds up to real money.
How it works
- 1A new email matching your invoice label arrives in Gmail.
- 2An OpenAI extraction step parses the sender, vendor name, invoice amount, and billing period.
- 3The workflow reads the vendor's last recorded amount from an Airtable ledger.
- 4A logic step computes percent change and compares it to the threshold.
- 5If the increase exceeds the threshold, it posts the old amount, new amount, and delta to Slack for review; otherwise it silently logs the run.
- 6The Airtable ledger is updated with the latest amount for next month's comparison.
Set it up
What you configure once, before turning it on.
- 1Connect GmailRead, draft, send, label.
- 2Connect OpenAIModels, embeddings, files.
- 3Connect AirtableBases, tables, views, automations.
- 4Connect SlackChannels, DMs, threads, mentions.
- 5Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 6Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 7Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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Run it inside a business
This workflow drops into a full company template. Import the org, and this is one of the playbooks its agents run.

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