/**
 * VasperaMemory Subscription Validation
 * Validates subscription status with server and caches result
 */
export interface SubscriptionStatus {
    valid: boolean;
    error?: string;
    message?: string;
    subscription?: {
        status: 'active' | 'trialing' | 'expired';
        tier: string;
        email: string;
        daysRemaining?: number;
        trialEnds?: string;
        trialEnded?: string;
        isPaid: boolean;
    };
    upgradeUrl?: string;
}
/**
 * Clear subscription cache
 */
export declare function clearSubscriptionCache(): void;
/**
 * Validate subscription with server
 * Returns cached result if available and not expired
 */
export declare function validateSubscription(apiKey: string): Promise<SubscriptionStatus>;
/**
 * Check subscription and throw/return error message if invalid
 * Use this as a gate before processing MCP tool calls
 */
export declare function requireValidSubscription(apiKey: string): Promise<{
    valid: boolean;
    errorMessage?: string;
    subscription?: SubscriptionStatus['subscription'];
}>;
/**
 * Format subscription status for display
 */
export declare function formatSubscriptionStatus(status: SubscriptionStatus): string;
//# sourceMappingURL=subscription.d.ts.map