DailyMed MCP Server

Instructions

Implementation Reference

• src/clients/spl-client.ts:316-342 (handler)

  The handler function `getSPLNDCs` in `SPLClient` class fetches NDC codes for a specific drug SET ID.

  async getSPLNDCs(setId: string): Promise<any[]> {
    if (!setId || typeof setId !== "string") {
      throw new Error("Valid SET ID is required");
    }
  
    try {
      const response = await this.client.get(`/spls/${setId}/ndcs.json`);
  
      if (
        response.data &&
        response.data.data &&
        Array.isArray(response.data.data)
      ) {
        return response.data.data.map((item: any) => ({
          ndc: item.ndc,
          packageNdc: item.package_ndc,
          productNdc: item.product_ndc,
        }));
      } else {
        throw new Error("Unexpected response structure for SPL NDCs");
      }
    } catch (error) {
      throw new Error(
        `Failed to fetch SPL NDCs: ${error instanceof Error ? error.message : "Unknown error"}`,
      );
    }
  }

• src/index.ts:87-96 (registration)

  The tool "get_drug_ndcs" is registered and handled in `src/index.ts` within the `setupHandlers` method of the `DailyMedServer` class, delegating the call to the `DailyMedClient`.

  case "get_drug_ndcs":
    const ndcs = await this.client.getSPLNDCs(args.setId as string);
    return {
      content: [
        {
          type: "text",
          text: JSON.stringify(ndcs, null, 2),
        },
      ],
    };

• src/tools.ts:41-53 (schema)

  The tool definition and input schema for "get_drug_ndcs" are defined in `src/tools.ts`.

    name: "get_drug_ndcs",
    description: "Get NDC codes for a specific drug by its SET ID",
    inputSchema: {
      type: "object",
      properties: {
        setId: {
          type: "string",
          description: "The SET ID of the drug to get NDCs for",
        },
      },
      required: ["setId"],
    },
  },