What Is an MCP Server? A Plain-English Guide for Online Sellers

An MCP server is a connector that lets AI tools like Claude and ChatGPT work with another app's live data. MCP stands for Model Context Protocol, an open standard for connecting AI apps to outside systems. For an online seller, it means you can ask your AI tool about your sales, orders and subscriptions in plain words, and it answers from your real numbers. SamCart has an official MCP server, in beta, on every plan.

Most sellers already use an AI tool for something: writing emails, outlining a course, brainstorming product names. The catch has always been that the AI doesn't know anything about your business. It can't see what sold yesterday, who canceled, or which upsell is working. So you export a report, paste it in, and hope it reads it right.

MCP fixes that gap.

What does MCP mean?

MCP is short for Model Context Protocol. It's an open-source standard for connecting AI applications to outside data and tools. Anthropic, the company behind Claude, open-sourced it in November 2024, and today AI assistants like Claude and ChatGPT support it.

The official MCP site describes it as "a USB-C port for AI applications." One standard plug, so any AI tool that supports MCP can connect to any app that offers an MCP server, without a custom build for each pair.

There are two sides:

MCP server vs API: what's the difference?

If you've heard of an API, an MCP server will sound familiar. Both let software talk to your SamCart account. The difference is who's doing the talking.

You don't have to pick one. If you want your numbers flowing into a dashboard every morning, our guide to creating a SamCart API key walks through it. If you want to ask "how did last month compare to the month before?" and get an answer in seconds, that's what MCP is for.

What can an AI tool do with SamCart's MCP server?

Once you connect, your AI tool can look things up across your marketplace. According to SamCart's help center, that includes:

• Sales: gross sales, net revenue, orders, refunds, average order value, conversion rate and visitors for a date range

• Orders and customers: order details and line items, and customer records you can search by email or phone

• Products, subscriptions and payments: your catalog, renewal dates, scheduled cancellations, and failed payments with the processor's reason

• Coupons, upsells and funnels: codes and usage, plus how your upsells and funnels are performing

If you choose to allow changes when you connect, it can also do things like create and edit products, create coupons, cancel, restart or reschedule subscriptions, and set up upsells and funnels.

A few questions you could ask:

• "Summarize my sales for the last 30 days and compare them to the previous 30 days."

• "List every subscription with a scheduled cancellation in the next 30 days."

• With changes allowed: "Show my coaching program as an upsell after my starter course."

Is it safe to connect an AI tool to my store?

Here's how SamCart's MCP server keeps you in charge:

• Look-up only by default. Changes only work if you check "Also allow this connection to make changes" when you connect.

• Your role sets the limits. The AI tool can only do what your SamCart user role allows in the app.

• Some things are off the table. It can't issue refunds or edit orders or customers.

• Your password stays out of the AI tool. You log in through SamCart in your browser.

One honest warning from the help center: changes made this way are real changes to your live store, the same as making them in your dashboard. Restarting a Stripe subscription charges the customer right away, and a new upsell shows on your live checkouts straight away. If you're not sure what your AI tool is about to do, ask it to describe the change first.

How to connect SamCart to Claude or ChatGPT

You need two things: the server address https://mcp.samcart.com and the connection type Streamable HTTP.

In Claude Desktop: go to Settings, then Customize, then Connectors. Add a custom connector named SamCart with that address, click Connect, log in to SamCart, and pick your marketplace.

In the ChatGPT desktop app: go to Settings, then Plugins, then MCPs. Add an MCP server with that address, choose Streamable HTTP, then authenticate and log in to SamCart.

Other AI tools that support remote MCP servers connect the same way. The full steps for each tool, including Claude on the web and command-line tools, are in SamCart's help article, Connect Your AI Assistant to SamCart (MCP).

Try it this week

Connect SamCart to the AI tool you already use and ask it one question you'd normally open a report for. Start with look-up only. You can always reconnect later and allow changes.

New to SamCart? Start your free trial and connect your AI tool on day one.

Sources

• SamCart help center: Connect Your AI Assistant to SamCart (MCP) and What Your AI Assistant Can Do in SamCart (MCP), both modified Oct 2, 2026

• What is the Model Context Protocol (MCP)?, modelcontextprotocol.io

• Anthropic: Introducing the Model Context Protocol

• SamCart: SamCart API