MAP monitoring for Amazon: every seller of your product, priced against your MAP

Built for
Brands and brand managers enforcing a MAP policy on Amazon, and the agencies that do it for them.
You enter
Up to 10 ASINs or Amazon links, each with its MAP. Your list of authorized sellers is optional.
Price
Free plan: 100 credits, no card. One analysis uses about 15–16 credits.
What you get
One seller table per product sorted by price: seller (linked to its storefront), item price, gap to MAP in $ and %, condition, ships from, seller ratings, buy box and flags. Used and Amazon Resale offers are listed apart. A summary per product: offers read, how many new offers are under MAP and whether the buy box is one of them, the lowest price and its seller, sellers flagged, and the three sellers to act on first.
Coverage
Amazon US (amazon.com), every offer on the listing. Each run is a snapshot of today's offers: there is no price history, no sales and no record of how long an offer has been up. Walmart and Google Shopping are not covered yet.
Time to report
Usually 2–4 minutes.
Account
Sign-in with Google required to run it. You can read the example and fill in the form without an account.

How do you check MAP violations on Amazon?

Read every offer on your product's listing, not just the buy box, and compare each new offer's item price with your MAP. In Nolyn's November 10, 2026 sample for two Lodge skillets, 1 of 36 new offers was under MAP: Amazon.com's buy box at −$1.52 (−6.1%); all 34 third-party offers were 32% or more above it.

For brands checking their own products, not competitors. Enter your ASINs with the minimum advertised price (MAP) of each. Nolyn reads every offer on each Amazon US listing, not only the buy box, and returns one seller table per product: each seller's price, the gap to your MAP in dollars and percent, and flags for offers under MAP and resellers that look unauthorized. Turn it into a weekly scheduled check with one click.

Check your MAP on Amazon

One product per line: the ASIN or Amazon link, then its MAP in US dollars. Up to 10 products.

Seller names as Amazon shows them, one per line. Every other seller is flagged as not on your list.

Start from an example:

Sign in to run it. New accounts get 100 free credits; research uses credits for AI and data lookups.

Example resultFrom a real run on November 10, 2026
Example: two Lodge cast iron skillets on Amazon US
See the full example
Offers read
40
New offers under MAP
1 of 36
Third-party offers under MAP
0 of 34
Credits for two products
16

Key findings

  • The only offer under MAP is Amazon's own buy box
  • No third-party seller undercuts MAP

The report includes

  • Every seller, not just the buy box
  • The gap to your MAP
  • Resellers to check
  • A weekly MAP check

What you get

Every seller, not just the buy box

All offers on each listing with seller, price, condition, ships from and seller ratings, each seller linked to its Amazon storefront.

The gap to your MAP

Each offer's price minus your MAP in dollars and percent, with new offers under MAP flagged and used or Amazon Resale offers kept apart.

Resellers to check

Sellers not on your authorized list, sellers with few or no ratings and sellers listing your product twice, each with the reason.

A weekly MAP check

A summary with the three sellers to act on first, and a one-click weekly rerun that reports on Mondays what changed since the last check.

Example: two Lodge cast iron skillets on Amazon US

A real run on November 10, 2026 for two Lodge skillets: the 10.25 in (B00006JSUA) and the 12 in (B00006JSUB). Nolyn read every offer on both Amazon US listings, 24 and 16, and priced each one against a MAP of $24.90 and $29.90. Lodge's real MAP is not public, so the example uses the price on Lodge's own store that day.

Offers read

40

every offer on both listings, 24 + 16

New offers under MAP

1 of 36

Amazon.com's buy box, −6.1%

Third-party offers under MAP

0 of 34

lowest is 32.3% above MAP

Credits for two products

16

2 for the offer lists, 14 for the AI

ProductSellerItem priceGap to MAPFlag
10.25 in · MAP $24.90Amazon.com$23.38−$1.52 (−6.1%)Under MAP · buy box, Amazon retail
10.25 in · MAP $24.90Cauff$32.95+$8.05 (+32.3%)Lowest third-party price
10.25 in · MAP $24.90UnbeatableSale Local$34.67 · $44.12+$9.77 (+39.2%) · +$19.22 (+77.2%)Listed twice
10.25 in · MAP $24.90UnbeatableSale, Inc$35.37 · $44.82+$10.47 (+42.0%) · +$19.92 (+80.0%)Listed twice
10.25 in · MAP $24.90American Bazaar Shop$50.47+$25.57 (+102.7%)Highest price
10.25 in · MAP $24.90Amazon Resale (3 used offers)$20.57–$21.51not countedUsed, kept apart
12 in · MAP $29.90Amazon.com$29.90$0.00 (0.0%)At MAP · buy box
12 in · MAP $29.90Pro Hardware$39.99+$10.09 (+33.7%)Lowest third-party price
12 in · MAP $29.90Hearthshire$45.60 · $45.60 · $49.90+$15.70 (+52.5%) · +$20.00 (+66.9%)Listed three times
12 in · MAP $29.90Homestead Supply & More ✅$56.65+$26.75 (+89.5%)Highest price

Offers read November 10, 2026, 14:45 UTC. Gap = item price minus MAP, shipping not added; percent of MAP, rounded to one decimal. Rows are the buy box, the lowest and highest third-party offers and every seller listing a product more than once; sellers with more than one offer show each price. The full report lists all 40 offers.

The only offer under MAP is Amazon's own buy box

Of 36 new offers, one is below MAP: Amazon.com holds the 10.25 in buy box at $23.38, $1.52 (6.1%) under the $24.90 MAP. On the 12 in, Amazon.com sits exactly at MAP at $29.90. Amazon sets its own retail price, so this goes to the brand's Amazon vendor contact, not to a reseller notice.

No third-party seller undercuts MAP

All 34 third-party new offers are at least 32% above MAP: from $32.95 (+32.3%) to $50.47 (+102.7%) on the 10.25 in and from $39.99 (+33.7%) to $56.65 (+89.5%) on the 12 in. On these listings the price risk is resellers sitting far above the buy box, not below it.

Three sellers list the same skillet more than once

Two UnbeatableSale seller accounts each hold two offers on the 10.25 in ($34.67 and $44.12; $35.37 and $44.82), and Hearthshire holds three on the 12 in ($45.60, $45.60 and $49.90). Every third-party seller has at least 138 ratings, so none is flagged for thin ratings.

Used offers are kept apart

Four Amazon Resale offers, three used 10.25 in skillets at $20.57 to $21.51 and one 12 in at $20.80, are the cheapest offers on both listings. They are listed in their own group and not counted as MAP violations.

Every price and gap on this page was recomputed from the two raw offer lists the run saved; all matched the report. The run used 16 credits and 3.6 minutes. An earlier run five minutes before returned the same 40 offers and the same figures, but its report added a flag rule nobody asked for and showed Amazon's product rating as a seller rating; the brief was tightened before this run.

Watching competitors' prices instead?

This page checks resellers of your own product. To compare what competing brands charge, with deals and coupons, use competitor price monitoring.

How it works

  1. Read every offer

    For each ASIN, Nolyn reads the full list of offers on the Amazon US listing: every seller's price, condition, ships from and ratings, and which offer holds the buy box.

  2. Price against your MAP

    Each offer's item price is compared with the MAP you entered for that product, in dollars and percent. Shipping is shown but not added.

  3. Flag who to check

    Offers under MAP, sellers not on your authorized list, sellers with few or no ratings and duplicate listings by the same seller are flagged with the reason.

  4. Report, then weekly

    You get a summary and one seller table per product as an HTML report, and can turn it into a weekly scheduled check from the report.

Who uses MAP monitoring

Brands with a MAP policy

See every reseller of your products on Amazon and who is under MAP today, with seller IDs and storefront links to send a notice or a reseller report.

Brand protection and channel managers

Check the listings against your authorized reseller list each week and catch new sellers you never approved.

Agencies managing Amazon for brands

Run a client's top ASINs weekly and send a dated MAP report instead of checking each offer page by hand.

What it cannot do

It reads Amazon US only; Walmart, eBay, Google Shopping and brand websites are not checked yet. Each run is a snapshot: it shows today's offers, not price history, sales or how long a seller has been on the listing. Unauthorized-looking is a reason to check a seller, not proof: Nolyn cannot see your distribution agreements, so without your authorized list it flags sellers by their ratings and listing behavior only. It does not send notices, file reports with Amazon or contact sellers. MAP applies to advertised prices; whether a coupon, a used offer or a cart price breaks your policy depends on your policy's wording.

Questions

MAP monitoring is checking the prices resellers advertise for your products against your minimum advertised price (MAP) and recording who is below it. On Amazon that means reading every offer on your listing, not only the buy box, because a reseller under MAP can sit on the second offer page. Nolyn reads all offers on each ASIN and puts each seller's gap to your MAP in one table.

A MAP violation is a reseller advertising your product below the minimum advertised price set in your MAP policy. MAP is a policy between a brand and its resellers, not a law: the brand decides what counts (item price, coupons, cart prices) and how to respond, usually a warning, then pausing supply. Nolyn shows the offers below the MAP you enter; your policy decides which of them you act on.

Compare every seller on your listings with your list of authorized resellers. Enter that list in the form and Nolyn flags every other seller by name, with its seller ID and storefront link. Without a list, it flags sellers that often turn out to be unauthorized: few or no seller ratings, or the same seller listing your product more than once. To see who the business behind one seller is, with its address as Amazon shows it, ratings and recent feedback, use the Amazon seller lookup.

MAP enforcement is what a brand does after it finds a violation: record the evidence (seller, price, date), notify the reseller under its MAP policy and escalate, for example by cutting off supply. Nolyn handles the first step, a dated table of who is under MAP and by how much, and does not contact sellers for you.

Yes. Dedicated MAP tools watch many retailers continuously for a monthly fee. Nolyn is a lighter option for Amazon: enter your ASINs and MAP, get a seller table in minutes, and rerun it weekly as a scheduled task, paying credits per check.

Yes. Under the finished report, turn on the weekly update: Nolyn reruns the check every Monday, compares it with the last report and tells you what changed, such as new sellers or new offers under MAP. Each run uses credits.

No. Used, renewed and Amazon Resale offers are listed in their own group with their price, but not counted as MAP violations, because most MAP policies cover new goods. If yours covers them too, read that group as well.

Competitor price monitoring tracks what other brands charge for competing products. MAP monitoring checks your own product: every seller offering it and whether they hold your price. For competitors' prices, use the competitor price monitoring tool.

Reading this page and the example is free. Running a check needs a Nolyn account: sign in and new accounts get 100 one-time free credits, no card. The two-product example used 16 credits (2 for the offer lists, 14 for the AI) and under 4 minutes. Weekly checks use credits on every run.

To run it, yes: sign in with Google. It is free and asks for no card. You can read the example and fill in the form before signing in.

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