qa

Instructions

Implementation Reference

• src/server.ts:36-36 (registration)

  The 'qa' tool is registered via registerBusinessTools(server, getAuth) call, which is imported from src/tools/business.ts

  registerBusinessTools(server, getAuth);

• src/tools/business.ts:50-67 (handler)

  The 'qa' tool handler function. Defines the tool with name 'qa', description, input schema (business_name, location, place_id), and the async handler that calls the API at /v1/business/qa.

  server.tool(
    "qa",
    "Get Questions & Answers from a Google Business Profile. Returns questions with their answers, authors, dates, and upvotes. Costs 1 credit.",
    {
      business_name: z.string().describe("Business name"),
      location: z.string().describe("City and state"),
      place_id: z.string().optional().describe("Google Place ID for exact match"),
    },
    READ_ONLY,
    withErrorHandling(async ({ business_name, location, place_id }) => {
      const result = await callApi(
        "/v1/business/qa",
        { business_name, location, ...(place_id && { place_id }) },
        getAuth()
      );
      return { content: [{ type: "text" as const, text: formatResult(result.data, result) }] };
    })
  );

• src/tools/business.ts:53-57 (schema)

  Input schema for the 'qa' tool using Zod: business_name (string), location (string), and optional place_id (string).

  {
    business_name: z.string().describe("Business name"),
    location: z.string().describe("City and state"),
    place_id: z.string().optional().describe("Google Place ID for exact match"),
  },

• src/api-client.ts:25-92 (helper)

  The callApi helper function used by the 'qa' tool handler to make POST requests to the API endpoint.

  export async function callApi(
    path: string,
    body: Record<string, unknown>,
    authHeader: string,
    timeoutMs = 60_000
  ): Promise<{ data: unknown; credits_used: number; credits_remaining: number; cached: boolean }> {
    const url = `${env.API_BASE_URL}${path}`;
  
    console.log(`[api] POST ${url} (timeout: ${timeoutMs / 1000}s, auth: ${authHeader ? `${authHeader.slice(0, 15)}...` : "MISSING"})`);
  
    const response = await fetch(url, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: authHeader,
      },
      body: JSON.stringify(body),
      signal: AbortSignal.timeout(timeoutMs),
    });
  
    if (!response.ok) {
      const text = await response.text();
      console.error(`[api] ${response.status} ${response.statusText} from ${path}: ${text.slice(0, 200)}`);
      // Try to parse as structured error
      try {
        const result = JSON.parse(text) as ApiErrorResponse;
        if (result.status === "error") {
          const err = result.error;
          const reqId = result.request_id ? ` [request_id: ${result.request_id}]` : "";
          throw new Error(
            err.required_credits
              ? `${err.message} (requires ${err.required_credits} credits, balance: ${err.current_balance})${reqId}`
              : `${err.message}${reqId}`
          );
        }
      } catch (parseErr) {
        if (parseErr instanceof Error && parseErr.message !== "error") {
          // Re-throw if it's our structured error from above
          if (!text.includes('"status":"error"')) {
            throw new Error(`API returned ${response.status}: ${text.slice(0, 200)}`);
          }
          throw parseErr;
        }
      }
      throw new Error(`API returned ${response.status}: ${text.slice(0, 200)}`);
    }
  
    const result = (await response.json()) as ApiResponse;
  
    if (result.status === "error") {
      const err = (result as ApiErrorResponse).error;
      const reqId = (result as ApiErrorResponse).request_id ? ` [request_id: ${(result as ApiErrorResponse).request_id}]` : "";
      throw new Error(
        err.required_credits
          ? `${err.message} (requires ${err.required_credits} credits, balance: ${err.current_balance})${reqId}`
          : `${err.message}${reqId}`
      );
    }
  
    console.log(`[api] ${path} OK (${result.credits_used} credits used, ${result.credits_remaining} remaining)`);
  
    return {
      data: result.data,
      credits_used: result.credits_used,
      credits_remaining: result.credits_remaining,
      cached: result.cached,
    };
  }

• src/api-client.ts:143-158 (helper)

  The withErrorHandling wrapper that provides error handling for the 'qa' tool handler.

  export function withErrorHandling<T>(
    fn: (args: T) => Promise<ToolResult>
  ): (args: T) => Promise<ToolResult> {
    return async (args) => {
      try {
        return await fn(args);
      } catch (err) {
        const message = err instanceof Error ? err.message : String(err);
        console.error(`[mcp] Tool error: ${message}`);
        return {
          content: [{ type: "text" as const, text: `Error: ${message}` }],
          isError: true,
        };
      }
    };
  }