Integrations we have shipped for marketplace brands, 3PLs and agencies
We build integrations between marketplaces, ad platforms, shipping tools and warehouse systems, on your own accounts. Each page below covers one system we have shipped an integration for: what syncs in each direction, what triggers each sync and the case study it shipped in. We list integrations we have built for clients, not a directory of logos.
Walmart Marketplace API
Walmart Marketplace API integration for brands: build notes on items, prices, stock and orders, OAuth 2.0 after Delegated Access, rate limits and errors.
Integration · Walmart Marketplace API
ShipStation
Custom ShipStation integration for 3PLs, prep centers and Amazon sellers: a sync map from a 3PL build, FBA inbound tracking, API limits and when not to build.
Integration · ShipStation
What we have shipped
| System | What syncs, and in which direction | Shipped in |
|---|---|---|
| Walmart Marketplace API |
| IVCSR: Amazon and Walmart sales platform |
| ShipStation |
| Pacific Prep: 3PL warehouse management system |
What syncs, and in which direction?
The table above lists each integration with what moves between the systems, in which direction and what starts each sync. Many integrations move some data both ways, such as orders coming in and tracking numbers going back, and other data one way only. Each integration page has the full list.
How is a new integration scoped and built?
We start from the data you need to move and the decisions it feeds, then check each system's API: authentication, rate limits, webhooks and what can and cannot be written back. The result is an architecture doc with a fixed price and go-live date, built on Ecomsellertool Growth OS or as a standalone service. Our team has built on Amazon's seller APIs since 2017 and has shipped integrations for 20+ marketplaces. For warehouse stock, see how we close 3PL reconciliation gaps and the warehouse systems we built for Ecomsherpa and Pacific Prep.
Who owns the integration code?
You keep your accounts, your data and the custom code we build; the Growth OS base is licensed to you. Integrations run on your own accounts and credentials, so access stays under your control.
Frequently asked questions
Can you integrate a system that is not listed here?
Often, yes, when the system has an API or a reliable export. We check the API first, then scope the build in an architecture doc with a fixed price and go-live date. This hub lists only integrations we have already shipped.
Do these pages mean you are an official partner of each platform?
No. They describe integrations we built through each platform’s public APIs for our clients. Logos and trademarks belong to their owners, and naming a platform does not imply its endorsement.
Who owns the integration code?
You keep your accounts, your data and the custom code we build; the Growth OS base is licensed to you.
Need two systems to talk to each other? Scope it with the engineers who build it.
Enter your email, connect your Amazon account with Login with Amazon, on Amazon’s own consent screen (we only read data; we never change listings, prices, stock or ads), and get a free report of what is going wrong within 24 hours of connecting, on business days. Prefer to talk it through? Schedule a call with the team that built these systems.
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