import { AxiosRequestConfig, AxiosResponse } from 'axios';
/**
 * A robust HTTP client wrapper built on Axios, providing features like
 * custom user-agent, proxy support, and centralized error handling.
 */
export declare class HttpClient {
    private client;
    private userAgent;
    /**
     * Initializes the HttpClient.
     * @param proxy Optional proxy URL (e.g., "http://user:pass@host:port").
     * @param userAgent Optional custom User-Agent string.
     */
    constructor(proxy?: string, userAgent?: string);
    /**
     * Performs a GET request.
     * @param url The URL to request.
     * @param config Optional Axios request configuration.
     * @returns A promise that resolves to the Axios response.
     */
    get<T = any>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
    /**
     * Performs a POST request.
     * @param url The URL to request.
     * @param data The data to post.
     * @param config Optional Axios request configuration.
     * @returns A promise that resolves to the Axios response.
     */
    post<T = any>(url: string, data?: any, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
    /**
     * Centralized error handling for Axios errors.
     * @param error The error object.
     */
    private handleAxiosError;
}