Square MCP Server

npx square-mcp-server start

{
  "mcpServers": {
    "square-mcp": {
      "command": "npx",
      "args": [
        "square-mcp-server",
        "start"
      ]
    }
  }
}

Rather than publishing one tool per endpoint, this server gives the assistant get_service_info, get_type_info and make_api_request, so it inspects a Square service and its parameter shape before calling anything. That covers catalog, orders, payments, customers and the rest of the Connect surface. You can run it locally with an access token via npx, or point a client at Square's hosted endpoint and sign in with OAuth. Environment switches let you pin the API version, stay in sandbox, or block every write call.