Klaviyo MCP Server

Implementation Reference

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

  Handler function that executes the get_product_reviews tool logic: fetches reviews using klaviyoClient and returns formatted JSON or error response.

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

• src/tools/reviews.js:8-12 (schema)

  Zod input schema defining optional parameters: filter, page_size, and page_cursor for the get_product_reviews tool.

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

• src/tools/reviews.js:7-27 (registration)

  Direct registration of the get_product_reviews tool on the MCP server, including schema, handler, and description.

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

• src/server.js:47-47 (registration)

  Top-level call to registerReviewTools, which includes the get_product_reviews tool registration.

  registerReviewTools(server);