Klaviyo MCP Server

Implementation Reference

• src/tools/coupons.js:13-25 (handler)

  Handler function for the 'get_coupons' tool. Fetches coupons from the Klaviyo API using the klaviyoClient, formats the response as JSON text, and handles errors.

  async (params) => {
    try {
      const coupons = await klaviyoClient.get('/coupons/', params);
      return {
        content: [{ type: "text", text: JSON.stringify(coupons, null, 2) }]
      };
    } catch (error) {
      return {
        content: [{ type: "text", text: `Error retrieving coupons: ${error.message}` }],
        isError: true
      };
    }
  },

• src/tools/coupons.js:8-12 (schema)

  Zod input schema defining optional parameters for the 'get_coupons' tool: filter (string), page_size (number 1-100), page_cursor (string).

  {
    filter: z.string().optional().describe("Filter query for coupons"),
    page_size: z.number().min(1).max(100).optional().describe("Number of coupons per page (1-100)"),
    page_cursor: z.string().optional().describe("Cursor for pagination")
  },

• src/tools/coupons.js:6-27 (registration)

  Direct registration of the 'get_coupons' tool using server.tool(), including schema, handler, and description.

  server.tool(
    "get_coupons",
    {
      filter: z.string().optional().describe("Filter query for coupons"),
      page_size: z.number().min(1).max(100).optional().describe("Number of coupons per page (1-100)"),
      page_cursor: z.string().optional().describe("Cursor for pagination")
    },
    async (params) => {
      try {
        const coupons = await klaviyoClient.get('/coupons/', params);
        return {
          content: [{ type: "text", text: JSON.stringify(coupons, null, 2) }]
        };
      } catch (error) {
        return {
          content: [{ type: "text", text: `Error retrieving coupons: ${error.message}` }],
          isError: true
        };
      }
    },
    { description: "Get coupons from Klaviyo" }
  );

• src/server.js:45-45 (registration)

  Top-level call to registerCouponTools(server), which in turn registers the 'get_coupons' tool among others.

  registerCouponTools(server);

• src/server.js:16-16 (registration)

  Import of registerCouponTools function used to register coupon tools including 'get_coupons'.

  import { registerCouponTools } from './tools/coupons.js';