/**
 * A custom error class to encapsulate API errors.
 * It contains the HTTP status code and the response data from the server.
 */
export declare class HttpError extends Error {
    statusCode: number;
    responseData: any;
    constructor(statusCode: number, message: string, responseData: any);
}
export declare class HttpClient {
    private baseURL;
    private defaultHeaders;
    constructor(baseURL: string, defaultHeaders?: Record<string, string>);
    /**
     * Performs a POST request.
     * @param path The endpoint path (e.g., '/v1/chat/completions').
     * @param body The request body.
     * @returns A promise that resolves with the JSON response.
     * @throws {HttpError} If the server returns an error status code (>= 400).
     * @throws {Error} If the response content cannot be parsed as JSON.
     */
    post<T>(path: string, body: any): Promise<T>;
    /**
     * Performs a GET request.
     * @param path The endpoint path.
     * @returns A promise that resolves with the JSON response.
     * @throws {HttpError} If the server returns an error status code (>= 400).
     * @throws {Error} If the response content cannot be parsed as JSON.
     */
    get<T>(path: string): Promise<T>;
    private makeRequest;
    private parseResponse;
}