Read Order Line -> Check Contracts -> Check Duplicates -> Flag -> Suggest Alternative

Maverick-Spend and Duplicate-Buy Catcher

This agent checks each requisition and purchase-order line the moment it is raised, against your rate contracts and item master. When a line is off-contract or repeats a recent order, it flags it and points to the contract or prior order the buyer should use instead. The catch happens at the order, not in a year-end audit.

The Problem

The off-contract buy was obvious in December. The order was raised in March.

A maintenance requisition goes through for a part already covered by a negotiated rate contract, at list price, from a random supplier. Two weeks earlier another site ordered the same part on a separate PO. Both go through because nobody cross-checks contracts and open orders at the moment of raising. The waste only shows up in the year-end spend review, long after the money is gone.

What Changes

Off-contract and duplicate buys get caught while they can still be changed.

As a requisition or PO line is raised, the agent checks it against your rate contracts and recent orders. If the item is covered by a contract the buyer skipped, or matches an order placed in the last few weeks, it flags the line and names the contract or prior PO to use instead. The buyer sees the alternative before the order is committed.

Humans stay in control: the agent flags the off-contract or duplicate line and names the better source, but the buyer decides whether to change or proceed with the order.

HOW THE AGENT WORKS

TRIGGERLLMAPIDECISIONACTIONWAIT

TRIGGERRequisition or PO raisedFires when a buyer raises a requisition or purchase-order line.

APIPull order line detailsReads the item, quantity, price, supplier, and site on the line.

APILoad contracts and item masterLoads rate contracts, the item master, and recent orders.

LLMCheck contract coverageChecks whether a rate contract already covers the item.

LLMFind recent duplicatesLooks for a matching order raised inside the duplicate window.

DECISIONOff-contract or duplicate?

ACTIONFlag order to buyerSends the buyer the flag and the contract or prior order to use instead.

The agent does not block or place orders. Your buyer does. The agent removes the year-end surprise by catching off-contract and duplicate buys at the moment they are raised.

HOW TO BUILD IT

Three levels of depth. Pick the one that matches where you are.

For the ops person who needs to understand what's involved and brief their team.

ERP purchase ordersRequisition and PO lines

The AgentWorkflow engine + LLM

Buyer / approverReviews flag, decides

WHAT YOUR TEAM PROVIDES ONCE

Requisition and PO lines - the orders as they are raised
Rate contracts - the negotiated agreements and covered items
Item master - the catalog that maps items to contracts and categories
Duplicate window - how many days back counts as a recent duplicate
Notification channel - where the buyer gets the flag and the alternative

What happens day-to-day: a buyer raises a requisition or purchase-order line and the agent checks it against rate contracts and recent orders as it is entered. If the line is off-contract or duplicates a recent buy, the buyer gets a flag naming the contract or prior PO to use. The buyer decides what to do before the order is committed.

For the IT person or technical lead who needs to scope the integration.

INQUIRY SOURCES

Requisition and PO lines: orders as they are raised, with item, quantity, and price.

Rate contracts: negotiated agreements and the items each one covers.

Item master: the catalog mapping items to contracts and categories.

WORKFLOW ENGINE (N8N)

Requisition or PO raised event

Pull order line details

Load rate contracts and item master

Check contract coverage

Find recent duplicate orders

Off-contract or duplicate

Flag order to buyer with alternative

CONNECTS TO

ERP purchase orders (SAP / Oracle / Coupa)Read: requisition and PO lines. Write: nothing

Rate contracts (Coupa / SAP Ariba)Read: negotiated agreements and covered items. Write: nothing

Item master (SAP / Oracle)Read: item-to-contract and category mapping. Write: nothing

Notification (Slack / Teams / Email)Read: nothing. Write: off-contract and duplicate flag to buyer

WITHOUT PMS API

Without API access, the agent works from a periodic purchase-order export and returns a flagged list your buyers review after the fact. The save is smaller because some orders have already gone out, but every flag still reaches a person.

WITH PMS API

With API access to your ERP and contract system, the agent checks each line as it is raised and returns the off-contract or duplicate flag inside the buyer's workflow in real time. The catch happens before the order is committed. Best experience.

For the person who wants to build this agent step by step. Each node below maps to an n8n workflow node.

TRIGGERNode 1

Trigger - fires when a requisition or PO line is raised

Event when a requisition or PO line is raised.

Output: The new order line.

APINode 2

API - pulls the order line details

GET the line details: item, quantity, price, supplier, and site.

Output: An order line ready to check.

APINode 3

API - loads rate contracts and the item master

GET rate contracts and the item master for coverage and recent orders.

Output: Contracts, catalog, and recent order history.

LLMNode 4

LLM - checks contract coverage and finds recent duplicates

Send the line, contracts, and recent orders; ask for off-contract and duplicate findings.

Output: Off-contract and duplicate findings with the source to use.

You are a procurement compliance assistant. Check the order line against the rate contracts and recent orders.

Order line: {line}
Rate contracts: {contracts}
Recent orders: {recent_orders}
Duplicate window in days: {window_days}

Set off_contract and duplicate flags and name the contract or prior order to use instead. Respond ONLY with valid JSON. No explanation.

INPUT

{"line":{"po_line":"PO-9931-10","item":"ITM-204","supplier":"S-12","price":48.0},"contracts":[{"contract":"RC-556","item":"ITM-204","price":39.5}],"recent_orders":[{"po":"PO-9902-04","item":"ITM-204","days_ago":14}],"window_days":30}

OUTPUT

{"line_result":{"po_line":"PO-9931-10","item":"ITM-204","off_contract":true,"contract_to_use":"RC-556","duplicate":true,"prior_order":"PO-9902-04","recommend":"Buy against RC-556 and check PO-9902-04 before ordering"}}

DECISIONNode 5

Decision - is the line off-contract or a duplicate?

If off_contract or duplicate is true, continue to flag; otherwise stop.

Output: A pass or a flag decision.

ACTIONNode 6

Action - flags the order to the buyer with the alternative

Send the flag and the alternative to the buyer.

Output: A flag with the contract or prior order named.

MVP vs Advanced — Where To Start

MVP — START HERE

Start with indirect and maintenance spend only.
Check off-contract against one rate-contract list.
Use a fixed lookback window for duplicates, say thirty days.
Send the flag to the buyer, do not block the order.
Have buyers confirm each flag was correct for the first month.
Log false flags to tighten item-to-contract matching.

ADVANCED — ADD LATER

Expand to all indirect categories and sites.
Match items to contracts by catalog ID and description.
Tune the duplicate window per category.
Return the exact contract line and price to use.
Surface the flag inside the requisition screen in real time.
=+ Track accepted flags to measure avoided off-contract spend.

Full Video Walkthrough Coming Soon

Watch the agent flag an off-contract line and name the contract to buy against instead.

Everything on this page is free to learn.

When you're ready to build — do it yourself or bring us in.

Book a call to scope this

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Frequently asked questions

Maverick-Spend and Duplicate-Buy Catcher is an AI agent that flags off-contract and duplicate buys the moment the order is raised.

The off-contract buy was obvious in December. The order was raised in March. The Maverick-Spend and Duplicate-Buy Catcher addresses this: flags off-contract and duplicate buys the moment the order is raised.

No. Your team stays in control. The agent does not block or place orders. Your buyer does. The agent removes the year-end surprise by catching off-contract and duplicate buys at the moment they are raised.

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