ShipStation API MCP Server

Implementation Reference

• src/tools/customer-tools.js:38-50 (handler)

  The async handler function for the 'get_customer' tool. It retrieves the customer using shipStationClient.getCustomer(customerId), returns JSON-formatted response or error message.

  handler: async ({ customerId }) => {
    try {
      const customer = await shipStationClient.getCustomer(customerId);
      return {
        content: [{ type: "text", text: JSON.stringify(customer, null, 2) }]
      };
    } catch (error) {
      return {
        content: [{ type: "text", text: error.message }],
        isError: true
      };
    }
  }

• src/tools/customer-tools.js:35-37 (schema)

  Zod schema defining the required input parameter 'customerId' as a number.

  schema: {
    customerId: z.number().describe("Customer ID to retrieve")
  },

• src/server.js:174-191 (registration)

  The registration loop that spreads customerTools (containing 'get_customer') and registers each tool with the MCP server using server.tool().

  [
    ...orderTools,
    ...shipmentTools,
    ...carrierTools,
    ...warehouseTools,
    ...productTools,
    ...customerTools,
    ...storeTools,
    ...webhookTools,
    ...fulfillmentTools
  ].forEach(tool => {
    server.tool(
      tool.name,
      tool.schema,
      tool.handler,
      { description: tool.description }
    );
  });

• src/api-client.js:161-163 (helper)

  ShipStationClient method getCustomer that makes the API request to retrieve a specific customer, called by the tool handler.

  async getCustomer(customerId) {
    return this.request('GET', `/customers/${customerId}`);
  }