Query Economic Indicators

Instructions

Implementation Reference

• src/tools/econ.ts:62-91 (handler)

  The handler function for query_indicators. It calls the Verilex API at /api/v1/econ/indicators with query params (series, category, frequency, limit), handles errors, and returns indicator data as text content.

    async ({ series, category, frequency, limit }) => {
      const res = await apiGet<EconQueryResponse>("/api/v1/econ/indicators", {
        series,
        category,
        frequency,
        limit: limit ?? 25,
      });
  
      if (!res.ok) {
        return {
          content: [
            {
              type: "text" as const,
              text: `API error (${res.status}): ${JSON.stringify(res.data)}`,
            },
          ],
          isError: true,
        };
      }
  
      const { count, data } = res.data;
      const warn = stalenessWarning(res);
      const summary = `${warn}Found ${count} indicator(s).`;
      const json = JSON.stringify(data, null, 2);
  
      return {
        content: [{ type: "text" as const, text: `${summary}\n\n${json}` }],
      };
    },
  );

• src/tools/econ.ts:40-60 (schema)

  Input schema for query_indicators using Zod. Defines optional parameters: series (string), category (string), frequency (enum: daily/weekly/monthly/quarterly/annual), limit (number 1-100, default 25).

  inputSchema: {
    series: z
      .string()
      .optional()
      .describe("FRED series ID (e.g. CPIAUCSL, GDP, UNRATE)"),
    category: z
      .string()
      .optional()
      .describe("Category filter (e.g. inflation, employment, gdp)"),
    frequency: z
      .enum(["daily", "weekly", "monthly", "quarterly", "annual"])
      .optional()
      .describe("Data frequency filter"),
    limit: z
      .number()
      .int()
      .min(1)
      .max(100)
      .optional()
      .describe("Maximum results (default 25)"),
  },

• src/tools/econ.ts:32-91 (registration)

  Registration of query_indicators tool via server.registerTool() with the name 'query_indicators', along with its title, description, input schema, and handler.

  server.registerTool(
    "query_indicators",
    {
      title: "Query Economic Indicators",
      description:
        "Get current values for economic indicators like CPI, GDP, unemployment, " +
        "interest rates, and more. Filter by series ID, category, or frequency. " +
        "Cost: $0.01 per query. Source: FRED, BLS, BEA.",
      inputSchema: {
        series: z
          .string()
          .optional()
          .describe("FRED series ID (e.g. CPIAUCSL, GDP, UNRATE)"),
        category: z
          .string()
          .optional()
          .describe("Category filter (e.g. inflation, employment, gdp)"),
        frequency: z
          .enum(["daily", "weekly", "monthly", "quarterly", "annual"])
          .optional()
          .describe("Data frequency filter"),
        limit: z
          .number()
          .int()
          .min(1)
          .max(100)
          .optional()
          .describe("Maximum results (default 25)"),
      },
    },
    async ({ series, category, frequency, limit }) => {
      const res = await apiGet<EconQueryResponse>("/api/v1/econ/indicators", {
        series,
        category,
        frequency,
        limit: limit ?? 25,
      });
  
      if (!res.ok) {
        return {
          content: [
            {
              type: "text" as const,
              text: `API error (${res.status}): ${JSON.stringify(res.data)}`,
            },
          ],
          isError: true,
        };
      }
  
      const { count, data } = res.data;
      const warn = stalenessWarning(res);
      const summary = `${warn}Found ${count} indicator(s).`;
      const json = JSON.stringify(data, null, 2);
  
      return {
        content: [{ type: "text" as const, text: `${summary}\n\n${json}` }],
      };
    },
  );

• src/index.ts:57-57 (registration)

  The call to registerEconTools(server) which registers query_indicators (among other econ tools) on the MCP server.

  registerEconTools(server);

• src/client.ts:35-41 (helper)

  The stalenessWarning helper used in the query_indicators handler to check for stale data headers from the API response.

  export function stalenessWarning(res: ApiResponse): string {
    if (!res.stale) return "";
    const parts = ["[STALE DATA]"];
    if (res.lastUpdated) parts.push(`Last updated: ${res.lastUpdated}`);
    if (res.ageSeconds != null) parts.push(`Age: ${res.ageSeconds}s`);
    return parts.join(" ") + "\n\n";
  }