Smartlead Simplified MCP Server

Instructions

Implementation Reference

• src/handlers/campaign.ts:385-421 (handler)

  The handler function that implements the core logic: validates input using isGetCampaignsByLeadParams and performs a GET request to `/leads/${lead_id}/campaigns` via the API client.

  async function handleGetCampaignsByLead(
    args: unknown, 
    apiClient: AxiosInstance,
    withRetry: <T>(operation: () => Promise<T>, context: string) => Promise<T>
  ) {
    if (!isGetCampaignsByLeadParams(args)) {
      throw new McpError(
        ErrorCode.InvalidParams,
        'Invalid arguments for smartlead_get_campaigns_by_lead'
      );
    }
  
    try {
      const response = await withRetry(
        async () => apiClient.get(`/leads/${args.lead_id}/campaigns`),
        'get campaigns by lead'
      );
  
      return {
        content: [
          {
            type: 'text',
            text: JSON.stringify(response.data, null, 2),
          },
        ],
        isError: false,
      };
    } catch (error: any) {
      return {
        content: [{ 
          type: 'text', 
          text: `API Error: ${error.response?.data?.message || error.message}` 
        }],
        isError: true,
      };
    }
  }

• src/tools/campaign.ts:257-271 (schema)

  Defines the tool's metadata, description, category, and input schema requiring a numeric lead_id.

  export const GET_CAMPAIGNS_BY_LEAD_TOOL: CategoryTool = {
    name: 'smartlead_get_campaigns_by_lead',
    description: 'Fetch all campaigns that a lead belongs to.',
    category: ToolCategory.CAMPAIGN_MANAGEMENT,
    inputSchema: {
      type: 'object',
      properties: {
        lead_id: {
          type: 'number',
          description: 'ID of the lead to fetch campaigns for',
        },
      },
      required: ['lead_id'],
    },
  };

• src/types/campaign.ts:170-177 (schema)

  Type guard function used in the handler to validate that the input arguments contain a valid numeric lead_id.

  export function isGetCampaignsByLeadParams(args: unknown): args is GetCampaignsByLeadParams {
    return (
      typeof args === 'object' &&
      args !== null &&
      'lead_id' in args &&
      typeof (args as { lead_id: unknown }).lead_id === 'number'
    );
  }

• src/index.ts:197-199 (registration)

  Registers the campaign tools (including smartlead_get_campaigns_by_lead) with the central ToolRegistry if the campaignManagement category is enabled.

  if (enabledCategories.campaignManagement) {
    toolRegistry.registerMany(campaignTools);
  }

• src/handlers/campaign.ts:51-52 (registration)

  Switch case in handleCampaignTool that routes calls to this specific tool to its handler function.

  case 'smartlead_get_campaigns_by_lead': {
    return handleGetCampaignsByLead(args, apiClient, withRetry);