/**
 * Metrx API Client
 *
 * Handles authenticated requests to the Metrx API.
 * Uses API key authentication (same as the SDK).
 *
 * The API key is passed via the METRX_API_KEY environment variable
 * or configured at runtime.
 */
import type { ApiResponse } from '../types.js';
export declare class MetrxApiClient {
    private readonly baseUrl;
    private readonly apiKey;
    private readonly maxRetries;
    constructor(apiKey?: string, baseUrl?: string, maxRetries?: number);
    /**
     * Common request headers for all API calls.
     */
    private get headers();
    /**
     * Parse API error response and return user-friendly message
     */
    private parseApiError;
    /**
     * Fetch with exponential backoff retry logic.
     * Retries only on 5xx errors and network errors, not on 4xx errors.
     *
     * @param url - The URL to fetch
     * @param options - Fetch options
     * @returns The fetch response
     * @throws Error if all retries fail or on non-retryable errors
     */
    private fetchWithRetry;
    /**
     * Make an authenticated GET request to the Metrx API.
     */
    get<T>(path: string, params?: Record<string, string | number | boolean>): Promise<ApiResponse<T>>;
    /**
     * Make an authenticated POST request to the Metrx API.
     */
    post<T>(path: string, body?: Record<string, unknown>): Promise<ApiResponse<T>>;
    /**
     * Make an authenticated PATCH request to the Metrx API.
     */
    patch<T>(path: string, body?: Record<string, unknown>): Promise<ApiResponse<T>>;
    /**
     * Lightweight ping to verify API key is valid.
     * Used by the `--test` CLI flag.
     * Attempts a GET request on the agents endpoint.
     * Returns { ok: true } on success, or { ok: false, error: string } on failure.
     */
    ping(): Promise<{
        ok: boolean;
        error?: string;
    }>;
}
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