marketo_get_lead_lists

Instructions

Implementation Reference

• src/index.ts:370-386 (registration)

  Registration of the 'marketo_get_lead_lists' tool on the MCP server with name, description, and Zod schema.

  server.tool(
    'marketo_get_lead_lists',
    'Get all static lists that a lead belongs to. Supports cursor-based pagination via nextPageToken. Returns list IDs and names.',
    {
      leadId: z.number(),
      batchSize: z.number().optional(),
      nextPageToken: z.string().optional(),
    },
    tool(async ({ leadId, batchSize = 100, nextPageToken }) => {
      const params = new URLSearchParams({ batchSize: batchSize.toString() });
      if (nextPageToken) params.append('nextPageToken', nextPageToken);
      return makeApiRequest(
        `/rest/v1/lists/${leadId}/leads.json?${params.toString()}`,
        'GET'
      );
    })
  );

• src/index.ts:373-377 (schema)

  Zod schema defining input parameters: leadId (number, required), batchSize (optional number), nextPageToken (optional string).

  {
    leadId: z.number(),
    batchSize: z.number().optional(),
    nextPageToken: z.string().optional(),
  },

• src/index.ts:378-385 (handler)

  Handler function for 'marketo_get_lead_lists' - constructs URL with leadId, batchSize, and optional nextPageToken parameters, then calls makeApiRequest with GET method.

  tool(async ({ leadId, batchSize = 100, nextPageToken }) => {
    const params = new URLSearchParams({ batchSize: batchSize.toString() });
    if (nextPageToken) params.append('nextPageToken', nextPageToken);
    return makeApiRequest(
      `/rest/v1/lists/${leadId}/leads.json?${params.toString()}`,
      'GET'
    );
  })

• src/index.ts:23-53 (helper)

  Helper function called by the handler - makeApiRequest performs the actual HTTP GET request to the Marketo API with authentication headers.

  async function makeApiRequest(
    endpoint: string,
    method: string,
    data?: any,
    contentType: string = 'application/json'
  ) {
    const token = await tokenManager.getToken();
    const headers: Record<string, string> = {
      Authorization: `Bearer ${token}`,
    };
  
    if (contentType) {
      headers['Content-Type'] = contentType;
    }
  
    try {
      const response = await axios({
        url: `${MARKETO_BASE_URL}${endpoint}`,
        method,
        data:
          contentType === 'application/x-www-form-urlencoded'
            ? new URLSearchParams(data).toString()
            : data,
        headers,
      });
      return response.data;
    } catch (error: any) {
      console.error('API request failed:', error.response?.data || error.message);
      throw error;
    }
  }

• src/index.ts:55-73 (helper)

  Helper 'tool' wrapper function that wraps the handler with try/catch and formats the response as MCP content with JSON stringification.

  function tool<T>(handler: (args: T) => Promise<unknown>) {
    return async (args: T) => {
      try {
        const response = await handler(args);
        return {
          content: [{ type: 'text' as const, text: JSON.stringify(response, null, 2) }],
        };
      } catch (error: any) {
        return {
          content: [
            {
              type: 'text' as const,
              text: `Error: ${error.response?.data?.message || error.message}`,
            },
          ],
          isError: true,
        };
      }
    };