import type { ProviderConfig } from "../config.js";
export interface QuotaInfo {
    provider: string;
    ok: boolean;
    quotaPercent?: number | null;
    creditBalanceUsd?: number | null;
    limitUsd?: number | null;
    usageUsd?: number | null;
    statusText?: string;
}
/**
 * Explicit quota/balance fetcher for key providers.
 * OpenRouter: GET https://openrouter.ai/api/v1/auth/key
 */
export declare function fetchProviderQuota(providerName: string, cfg: ProviderConfig, apiKey?: string, fetchFn?: typeof fetch): Promise<QuotaInfo>;