Alpaca MCP Server

Implementation Reference

• index.ts:89-100 (handler)

  The main handler function for the 'get-market-days' tool. It makes an API request to the Alpaca calendar endpoint with start and end dates, returns JSON stringified market days on success, or an error message on failure.

  export async function getMarketDays({ start, end }: { start: string; end: string }) {
    try {
      const days = await request<any[]>({
        base: process.env.ALPACA_ENDPOINT!,
        path: "/v2/calendar",
        params: { start, end },
      });
      return { content: [{ type: "text", text: JSON.stringify(days) }] as any };
    } catch (err: any) {
      debug("get-market-days error", err);
      return { content: [{ type: "text", text: `Error fetching market days: ${err.message}` }] as any, isError: true };
    }

• index.ts:149-153 (registration)

  Registration of the 'get-market-days' tool on the MCP server, including the tool name, inline Zod schema for input parameters (start and end as strings), and reference to the getMarketDays handler function.

  server.tool(
    "get-market-days",
    { start: z.string(), end: z.string() },
    getMarketDays
  );

• index.ts:151-152 (schema)

  Inline schema definition for the tool's input parameters using Zod: start and end as strings.

  { start: z.string(), end: z.string() },
  getMarketDays