/**
 * ServiceNow HTTP client — native fetch-based, zero external dependencies.
 *
 * @module client
 */
import { ServiceNowConfig } from "./config.js";
export interface ServiceNowError {
    message: string;
    detail?: string;
    status?: number;
}
export declare class ServiceNowClient {
    private config;
    private baseUrl;
    private authHeader;
    constructor(config: ServiceNowConfig);
    get(path: string, params?: Record<string, string>): Promise<any>;
    post(path: string, body?: unknown): Promise<any>;
    patch(path: string, body?: unknown): Promise<any>;
    put(path: string, body?: unknown): Promise<any>;
    delete(path: string): Promise<{
        status: number;
    }>;
    /**
     * POST binary data (for attachment uploads).
     */
    postBinary(path: string, data: Buffer, contentType: string, params?: Record<string, string>): Promise<any>;
    /**
     * GET raw response (for attachment downloads).
     */
    getRaw(path: string): Promise<{
        data: Buffer;
        contentType: string;
    }>;
    private buildUrl;
    private request;
    private parseErrorBody;
    private createError;
}
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