Klaviyo MCP Server

Implementation Reference

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

  Handler function that fetches segments from Klaviyo API using the klaviyoClient and returns the JSON response or an error message.

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

• src/tools/segments.js:8-12 (schema)

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

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

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

  Registers the 'get_segments' tool with the MCP server, specifying name, input schema, handler function, and description.

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