NPI Dataset Statistics

Instructions

Implementation Reference

• src/tools/npi.ts:152-173 (handler)

  The async handler function for the npi_stats tool. Calls the API endpoint /api/v1/npi/stats and returns the JSON response containing dataset statistics (record count, last updated, etc.).

    async () => {
      const res = await apiGet<NpiStatsResponse>("/api/v1/npi/stats");
  
      if (!res.ok) {
        return {
          content: [
            {
              type: "text" as const,
              text: `API error (${res.status}): ${JSON.stringify(res.data)}`,
            },
          ],
          isError: true,
        };
      }
  
      return {
        content: [
          { type: "text" as const, text: JSON.stringify(res.data, null, 2) },
        ],
      };
    },
  );

• src/tools/npi.ts:19-24 (schema)

  The NpiStatsResponse interface defines the shape of the API response: dataset, source, update_frequency, and a stats object.

  interface NpiStatsResponse {
    dataset: string;
    source: string;
    update_frequency: string;
    stats: Record<string, unknown>;
  }

• src/tools/npi.ts:143-151 (registration)

  Registration of the npi_stats tool on the MCP server via server.registerTool(), with the name 'npi_stats', a title, description, and an empty input schema.

  server.registerTool(
    "npi_stats",
    {
      title: "NPI Dataset Statistics",
      description:
        "Get statistics about the NPI dataset: total record count, number of states, " +
        "last updated timestamp, and data source information. Free endpoint, no payment required.",
      inputSchema: {},
    },

• src/index.ts:39-39 (registration)

  Call to registerNpiTools(server) in the main entry point, which wires up the npi_stats tool (along with query_npi_providers and lookup_npi) into the MCP server.

  registerNpiTools(server);

• src/client.ts:44-76 (helper)

  The apiGet helper function used by the npi_stats handler to make the HTTP GET request to the Verilex API.

  export async function apiGet<T = unknown>(
    path: string,
    params?: Record<string, string | number | undefined>,
  ): Promise<ApiResponse<T>> {
    const url = buildUrl(path, params);
  
    const headers: Record<string, string> = {
      Accept: "application/json",
      "User-Agent": "verilex-mcp-server/0.1.0",
    };
  
    // Forward x402 payment token if present in env (for paid endpoints)
    const paymentToken = process.env.VERILEX_PAYMENT_TOKEN;
    if (paymentToken) {
      headers["X-Payment-Token"] = paymentToken;
    }
  
    const res = await fetch(url, { headers });
    const data = (await res.json()) as T;
  
    const stale = res.headers.get("X-Data-Stale");
    const lastUpdated = res.headers.get("X-Data-Last-Updated");
    const ageSeconds = res.headers.get("X-Data-Age-Seconds");
  
    return {
      ok: res.ok,
      status: res.status,
      data,
      stale: stale === "true",
      lastUpdated: lastUpdated ?? undefined,
      ageSeconds: ageSeconds ? Number(ageSeconds) : undefined,
    };
  }