marketo_get_lead_by_id

Instructions

Implementation Reference

• src/index.ts:254-267 (registration)

  Registration of the 'marketo_get_lead_by_id' tool using server.tool() on the McpServer instance.

  server.tool(
    'marketo_get_lead_by_id',
    'Retrieve a lead by its numeric Marketo ID. Optionally specify which fields to return (defaults to standard fields). Returns lead record with all requested field values.',
    {
      leadId: z.number(),
      fields: z.array(z.string()).optional(),
    },
    tool(async ({ leadId, fields }) => {
      const params = new URLSearchParams();
      if (fields) params.append('fields', fields.join(','));
      const query = params.toString() ? `?${params.toString()}` : '';
      return makeApiRequest(`/rest/v1/lead/${leadId}.json${query}`, 'GET');
    })
  );

• src/index.ts:257-260 (schema)

  Input schema for 'marketo_get_lead_by_id': leadId (required number) and fields (optional array of strings).

  {
    leadId: z.number(),
    fields: z.array(z.string()).optional(),
  },

• src/index.ts:261-266 (handler)

  Handler function that constructs a Marketo REST API GET request to /rest/v1/lead/{leadId}.json with optional fields query parameter.

  tool(async ({ leadId, fields }) => {
    const params = new URLSearchParams();
    if (fields) params.append('fields', fields.join(','));
    const query = params.toString() ? `?${params.toString()}` : '';
    return makeApiRequest(`/rest/v1/lead/${leadId}.json${query}`, 'GET');
  })

• src/index.ts:23-53 (helper)

  The makeApiRequest helper function that executes the actual HTTP call to Marketo's API with Bearer token authentication.

  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:55-74 (helper)

  The 'tool' wrapper helper that handles formatting responses and error handling for all tool handlers.

  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,
        };
      }
    };
  }