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How to Connect MCP Server to Claude

Step-by-step setup to give Claude access to your Seller Assistant account

Adding Connector

  1. Open Claude and go to Customize section in the side menu.
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  2. Open Connectors, search for Seller Assistant and pick the connector from the list.
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  3. Click "Connect to Claude" on it.
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  4. Allow access through your Seller Assistant account. Once you approve, the connector appears in your list and is ready to use.
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If you prefer to add it by hand, or you do not see it in the directory:

  1. In Connectors, click "Add" and pick "Add custom connector".
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  2. Enter a name and paste the MCP server URL below:
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    https://mcp.sellerassistant.app/mcp

  3. Click "Continue" and configure OAuth authentication. The settings are detected automatically.
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  4. To connect with your API key instead of OAuth, generate one first – see How to Generate API Key in Seller Assistant – then paste this URL instead, with your key added as a query parameter:

    https://mcp.sellerassistant.app/mcp?api_key=YOUR_API_KEY

    Replace YOUR_API_KEY with the key you generated.

  5. Click "Continue" and configure No sign-in authentication. The settings are detected automatically.
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  6. Click "Add" and allow access through your Seller Assistant account. It will appear in the list once it has been successfully connected.

Using Connector

The connector is not active by default in every conversation. To use it, open a new chat, click the plus button next to the message box, open Connectors, and toggle Seller Assistant on before sending your first message.

The same menu has an "Add from Seller Assistant" list. It holds ready-made prompts for the most common tasks:

  • Analyze a supplier price list

  • Check product restrictions

  • Create a purchase order

  • Get account overview

  • Match ASINs to UPC/EAN

  • Review repricer performance

Click one and Claude puts the prompt into the message box. Add your own details – the ASIN, the supplier name, the file – and send it.

Type your request in natural language. Claude will call Seller Assistant in the background and return the result directly in the chat.

For a full list of things you can ask, see Prompts for Seller Assistant MCP article.

To connect the MCP Server to ChatGPT instead, see How to Connect MCP Server to ChatGPT.

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