Marketo MCP Server

Implementation Reference

• src/index.ts:610-635 (handler)

  Handler function that executes the 'marketo_get_lead_lists' tool logic by calling the Marketo API to retrieve leads from a list.

  async ({ leadId, batchSize = 100, nextPageToken }) => {
    try {
      const params = new URLSearchParams({
        batchSize: batchSize.toString(),
      });
  
      if (nextPageToken) {
        params.append('nextPageToken', nextPageToken);
      }
  
      const response = await makeApiRequest(
        `/rest/v1/lists/${leadId}/leads.json?${params.toString()}`,
        'GET'
      );
  
      return {
        content: [{ type: 'text', text: JSON.stringify(response, null, 2) }],
      };
    } catch (error: any) {
      return {
        content: [
          { type: 'text', text: `Error: ${error.response?.data?.message || error.message}` },
        ],
      };
    }
  }

• src/index.ts:605-609 (schema)

  Input schema validation using Zod for the 'marketo_get_lead_lists' tool parameters.

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

• src/index.ts:603-636 (registration)

  Registration of the 'marketo_get_lead_lists' tool on the MCP server, including name, schema, and inline handler.

  server.tool(
    'marketo_get_lead_lists',
    {
      leadId: z.number(),
      batchSize: z.number().optional(),
      nextPageToken: z.string().optional(),
    },
    async ({ leadId, batchSize = 100, nextPageToken }) => {
      try {
        const params = new URLSearchParams({
          batchSize: batchSize.toString(),
        });
  
        if (nextPageToken) {
          params.append('nextPageToken', nextPageToken);
        }
  
        const response = await makeApiRequest(
          `/rest/v1/lists/${leadId}/leads.json?${params.toString()}`,
          'GET'
        );
  
        return {
          content: [{ type: 'text', text: JSON.stringify(response, null, 2) }],
        };
      } catch (error: any) {
        return {
          content: [
            { type: 'text', text: `Error: ${error.response?.data?.message || error.message}` },
          ],
        };
      }
    }
  );

• src/index.ts:22-52 (helper)

  Shared helper function for making authenticated API requests to Marketo, used by the tool handler.

  async function makeApiRequest(
    endpoint: string,
    method: string,
    data?: any,
    contentType: string = 'application/json'
  ) {
    const token = await tokenManager.getToken();
    const headers: any = {
      Authorization: `Bearer ${token}`,
    };
  
    if (contentType) {
      headers['Content-Type'] = contentType;
    }
  
    try {
      const response = await axios({
        url: `${MARKETO_BASE_URL}${endpoint}`,
        method: 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;
    }
  }