AI Connectors and MCP, Explained Simply

This fall, connectors were everywhere. Gusto, Shopify, Xero, and 3Dsellers all announced ways to connect their apps to the AI assistant you already use. Here's what that means, in plain English, using official pages checked on Oct 28, 2026.

What's a connector? It's a link between an AI assistant, like Claude, ChatGPT, Gemini, or Grok, and another app, like your payroll, store, or accounting software. Once connected, the assistant can read information from that app, and sometimes take actions there.

What's MCP? The Model Context Protocol's official site calls MCP an open-source standard for connecting AI applications to external systems, and compares it to a USB-C port for AI applications. In everyday terms: one standard plug, so many assistants can work with many apps.

Examples from official announcements:

• Gusto: Gusto says its MCP server connects payroll and people data to Claude and ChatGPT, and approving a payroll run always stays a human decision.
• Shopify: Shopify says its connectors now work with nine AI agents, so you can manage products, inventory, and orders from the chat.
• 3Dsellers: 3Dsellers says one connection lets an assistant work across eBay, Amazon, Etsy, Shopify, and more.
• Xero: Xero says its Gemini connected app brings live Xero data into Gemini conversations.

What a connector can do depends on two things:

• Your permissions: Gusto says a connection inherits the permissions you already have, and Anthropic says Claude can only see what the connected account can see.
• The connector's design: some read only; others can make changes, often after you confirm.

Good habits (our suggestions):

• Connect one tool at a time, and start with questions before changes.
• Use an admin or owner account only when you need to. A role with less access is safer for everyday use.
• Read approval requests in full before you confirm.
• Check request logs where the tool offers them.
• Remove connectors you no longer use. Our connector access review playbook shows how.

A small-business example: a bike shop owner connects Shopify to her AI assistant and asks, "Which products sold out last month?" A week later, she lets it draft restock orders, but she approves each one. She doesn't connect payroll until she's comfortable with how the first connector works. (Our illustration.)

Questions to ask before you connect:

• What can it read, and what can it change?
• Who in my business can approve changes?
• How do I turn it off?

Plain-English terms:

• Server: the software that offers the connection, often run by the app's company.
• Client: the AI assistant that uses the connection.
• Scope: the set of permissions a connection has.

Next steps: see our profiles for Gusto AI, 3Dsellers, and Claude for Small Business, and our lesson on letting AI agents pay safely.