INVOICE PROCESSING
Flag Stripe Subscription Invoices That Spike Above Their Baseline
When Stripe finalizes a subscription invoice, compares its amount to that subscription's rolling historical average and posts a Slack alert if it deviates beyond your threshold…
How it runs
The automated pipeline, trigger to output.
- TriggerStripe invoice.finalized webhookStripe
- ActionFetch subscription's recent invoices, compute baselinePostgres
- LogicDeviation exceeds threshold?
- ActionRecord anomaly row for audit trailPostgres
- OutputPost baseline-breach alert to finance Slack channelSlack
What it does
Catches recurring-charge surprises the moment Stripe finalizes an invoice. It pulls the last several invoices for the same subscription, computes a baseline, and if the new amount jumps past your tolerance (for example, more than 25 percent above average), it raises a Slack alert during the finalization window — before the card is charged.
When to use it
Use it when vendors silently bump subscription pricing, add seats, or apply usage overages that you only notice on the credit card statement. It gives finance a chance to dispute or pause a charge while it is still pending rather than chasing a refund later.
How it works
- 1Stripe fires `invoice.finalized` for a subscription invoice.
- 2The flow queries Postgres for that subscription's recent paid invoices and computes a rolling average and standard deviation.
- 3A logic step compares the new amount against the baseline plus your threshold.
- 4If it is within tolerance, the run ends quietly.
- 5If it deviates, an action writes the anomaly row back to Postgres for the audit trail.
- 6A Slack message tags the finance channel with the vendor, old vs new amount, percent change, and the invoice link so someone can act before settlement.
Set it up
What you configure once, before turning it on.
- 1Connect StripeCustomers, subscriptions, payments.
- 2Connect PostgresAny Postgres URL — query, write, migrate.
- 3Connect SlackChannels, DMs, threads, mentions.
- 4Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 5Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 6Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
More Invoice Processing workflows
Nightly audit that flags duplicate payments already made
Runs every night to scan the last 90 days of Stripe payments against your Postgres invoice ledger.
Agent that codes Front invoices to GL accounts and drafts a bill
An agent reads each Front vendor invoice, assigns GL account codes per line item using your chart of accounts and past coding history.
AI agent that investigates suspected duplicate invoices
When a new invoice can't be cleared by exact-match rules, an AI agent reviews paid history for near-duplicates (split bills, renamed vendors, rounding) and recommends pay, hold…
Gate invoice approvals on a duplicate cross-check
When an approver clicks Approve in your AP system, a webhook re-validates the invoice against paid history in Postgres and Stripe charges.
Catch duplicate invoices as they hit your AP inbox
Watches your accounts-payable Gmail inbox for incoming invoice emails, fingerprints each one, and routes likely duplicates to a review label instead of into the approval queue.
Block duplicate Stripe payouts before they send
When a new vendor invoice is queued for payment in Stripe, cross-check it against your paid-invoice history in Postgres and halt any payout that matches an already-paid invoice.
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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