About

We build the FBA tooling
we wished existed.

MarketMonster.co is an independent software company. We build inbound-shipment, inventory, and listing tools for Amazon sellers, right on top of the Amazon Selling Partner API. The goal is simple: a faster, clearer workflow, with no paywalled "insights," no half-built features, and no upsell hiding behind every button.

What we do

MarketMonster runs your Amazon seller workflow on top of the public Selling Partner API. Today it covers FBA inbound shipments, box content, labels and packing lists, live inventory and shipment tracking, listing price history, and shared pick lists for your team. Everything works on data we pull with your permission. We do not scrape, we do not pool seller data across customers, and we never sell your data.

How we're different

Most tools in this space were built for Amazon's old shipment flow. The new one, Send to Amazon, changed everything: placement options, transport timeouts, and partnered-carrier quirks. A lot of older tools never caught up, and patch it on the side. We built MarketMonster for the new flow from day one. We handle the placement options and the quiet failures in the background, so you do not have to think about them. And the bookkeeping data Amazon already gives you, like listing price history and fee breakdowns, is built in here, not sold as an add-on.

Independence

MarketMonster is not affiliated with, endorsed by, or sponsored by Amazon.com, Inc. We are a third-party Solution Provider in the Amazon SP-API program. We make no claim to special treatment, insider access, or private data. Everything you see here is data Amazon already gives you through their public API. We just make it easier to use.