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Privacy Notice

Fourshelf is operated by Complete Filtration Services, Inc., 2690 Gatlin St, Simpson, NC 27879, USA. Last updated 14 September 2026.

What Fourshelf is

Fourshelf is a reporting and catalog-management tool for marketplace sellers. It connects to a seller's own accounts on Amazon, Walmart, eBay and Shopify, and to order-management tools the seller already uses, and shows the seller's own data back to them on one screen.

Data we process

How we use it

Only to provide the service to you: computing profit and loss, checking listing health, keeping your catalog consistent across your own stores, planning inventory, and alerting you. We do not sell data, do not use your data to advertise to anyone, and do not use your customers' data for any purpose other than showing you your own orders.

Marketplace credentials

Connections use each marketplace's own authorisation flow (for example Amazon Selling Partner API authorisation and Walmart Marketplace OAuth). Tokens are stored encrypted on our servers and used only to call that marketplace on your behalf. You can revoke access at any time from the marketplace's own settings, and we delete the token when you disconnect a store or close your account.

Use of information received from Amazon APIs adheres to the Amazon Services API Developer Agreement and Acceptable Use Policy, including Amazon's data protection requirements for personally identifiable information. Use of Walmart data adheres to the Walmart Marketplace Solution Provider terms.

Where data lives and how long

Data is hosted in the United States on Fly.io infrastructure with encrypted storage. Marketplace order data older than 24 months is deleted on a rolling basis; customer personally identifiable information contained in orders is retained only as long as needed to display the order and no longer than the marketplace's own retention rules allow. Account data is deleted within 30 days of closing your account.

Who we share with

Our hosting provider (Fly.io) and, where you have connected them, your own marketplaces and order-management tools. No other third parties, unless required by law.

Your choices

You can export or delete your data, disconnect any store, or close your account by emailing hello@fourshelf.com. We answer within five business days.

Security

Access is by individual sign-in over HTTPS only. Credentials are never shown in the interface or logs. Writes to a marketplace are previewed before they are applied.

Contact

Complete Filtration Services, Inc. · 2690 Gatlin St, Simpson, NC 27879 · hello@fourshelf.com · (252) 717-3218