/**
 * Port Check Utility
 * Check if a port is open before attempting to connect
 */
export interface PortCheckResult {
    open: boolean;
    host: string;
    port: number;
    error?: string;
}
/**
 * Check if a port is open on a given host
 * @param port The port number to check
 * @param host The host to check (default: localhost)
 * @param timeoutMs Timeout in milliseconds (default: 2000)
 */
export declare function checkPort(port: number, host?: string, timeoutMs?: number): Promise<PortCheckResult>;
/**
 * Parse a URL and extract host and port
 * Returns null if URL is invalid or doesn't have a port
 */
export declare function parseUrlForPortCheck(url: string): {
    host: string;
    port: number;
} | null;
/**
 * Check if a URL's server is reachable
 * Only checks localhost/127.0.0.1 URLs (skips external URLs)
 */
export declare function checkUrlPort(url: string, timeoutMs?: number): Promise<PortCheckResult | null>;
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