Clinical Trials MCP Server

Instructions

Implementation Reference

• src/index.ts:1469-1549 (handler)

  Handler function for search_by_date_range tool.

  private async handleSearchByDateRange(args: any) {
    const params: any = {
      format: "json",
      pageSize: args?.pageSize || 10,
    };
  
    if (args?.startDateFrom) {
      params["filter.studyStartDateFrom"] = args.startDateFrom;
    }
  
    if (args?.startDateTo) {
      params["filter.studyStartDateTo"] = args.startDateTo;
    }
  
    if (args?.completionDateFrom) {
      params["filter.primaryCompletionDateFrom"] = args.completionDateFrom;
    }
  
    if (args?.completionDateTo) {
      params["filter.primaryCompletionDateTo"] = args.completionDateTo;
    }
  
    if (args?.condition) {
      params["query.cond"] = args.condition;
    }
  
    try {
      const response: AxiosResponse<StudySearchResponse> =
        await this.axiosInstance.get("/studies", { params });
  
      const studies = response.data.studies || [];
      const results = studies.map((study) => ({
        ...this.formatStudySummary(study),
        dates: {
          startDate: study.protocolSection.statusModule.startDateStruct?.date,
          primaryCompletionDate:
            study.protocolSection.statusModule.primaryCompletionDateStruct
              ?.date,
        },
      }));
  
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(
              {
                searchCriteria: {
                  startDateFrom: args?.startDateFrom,
                  startDateTo: args?.startDateTo,
                  completionDateFrom: args?.completionDateFrom,
                  completionDateTo: args?.completionDateTo,
                  condition: args?.condition,
                },
                totalCount: response.data.totalCount || 0,
                resultsShown: results.length,
                studies: results,
              },
              null,
              2
            ),
          },
        ],
      };
    } catch (error) {
      if (axios.isAxiosError(error)) {
        return {
          content: [
            {
              type: "text",
              text: `Clinical Trials API error: ${
                error.response?.data?.message || error.message
              }`,
            },
          ],
          isError: true,
        };
      }
      throw error;
    }
  }

• src/index.ts:397-436 (registration)

  Schema registration for search_by_date_range tool.

    name: "search_by_date_range",
    description:
      "Search clinical trials by start or completion date range",
    inputSchema: {
      type: "object",
      properties: {
        startDateFrom: {
          type: "string",
          description: "Start date from (YYYY-MM-DD format)",
          pattern: "^\\d{4}-\\d{2}-\\d{2}$",
        },
        startDateTo: {
          type: "string",
          description: "Start date to (YYYY-MM-DD format)",
          pattern: "^\\d{4}-\\d{2}-\\d{2}$",
        },
        completionDateFrom: {
          type: "string",
          description: "Primary completion date from (YYYY-MM-DD format)",
          pattern: "^\\d{4}-\\d{2}-\\d{2}$",
        },
        completionDateTo: {
          type: "string",
          description: "Primary completion date to (YYYY-MM-DD format)",
          pattern: "^\\d{4}-\\d{2}-\\d{2}$",
        },
        condition: {
          type: "string",
          description: "Optional condition filter",
        },
        pageSize: {
          type: "number",
          description:
            "Number of results to return (default 10, max 100)",
          minimum: 1,
          maximum: 100,
        },
      },
    },
  },