@nyuta/estat-mcp/dist/api-client.js

MCP server for e-Stat API integration - Access Japanese government statistical data

const E_STAT_BASE_URL = "https://api.e-stat.go.jp/rest/3.0/app/json/";
const REQUEST_TIMEOUT = 600000;
export class EStatAPIClient {
    appId;
    constructor(appId) {
        if (!appId) {
            throw new Error("E_STAT_APP_ID environment variable is not set");
        }
        this.appId = appId;
    }
    async request(endpoint, params) {
        const url = this.buildURL(endpoint, params);
        try {
            const response = await this.fetchWithTimeout(url);
            if (!response.ok) {
                return this.createErrorResponse(`HTTP error! status: ${response.status}`, String(response.status));
            }
            return await response.json();
        }
        catch (error) {
            return this.handleError(error);
        }
    }
    buildURL(endpoint, params) {
        const url = new URL(`${E_STAT_BASE_URL}${endpoint}`);
        url.searchParams.append("appId", this.appId);
        for (const [key, value] of Object.entries(params)) {
            if (value !== undefined && value !== null && value !== "") {
                url.searchParams.append(key, String(value));
            }
        }
        return url;
    }
    async fetchWithTimeout(url) {
        const controller = new AbortController();
        const timeoutId = setTimeout(() => controller.abort(), REQUEST_TIMEOUT);
        try {
            const response = await fetch(url.toString(), {
                signal: controller.signal,
                headers: {
                    "Accept": "*/*",
                    "User-Agent": "estat-mcp/1.0",
                },
            });
            return response;
        }
        finally {
            clearTimeout(timeoutId);
        }
    }
    handleError(error) {
        const err = error;
        if (err.name === "AbortError") {
            return this.createErrorResponse("Request timeout. Please try again.", "timeout");
        }
        if (err.code === "ENOTFOUND" || err.code === "ECONNREFUSED") {
            return this.createErrorResponse("Cannot connect to e-Stat API. Please check your internet connection.", "connection_error");
        }
        return this.createErrorResponse(`Error occurred: ${err.message || String(error)}`, "unknown_error", String(error));
    }
    createErrorResponse(error, status, details) {
        return { error, status, ...(details && { details }) };
    }
}
//# sourceMappingURL=api-client.js.map