import * as WebhookDestination from '../WebhookDestination.js';
/**
 * Builds a `url` destination. Its `deliver` serializes the envelope, signs the
 * raw body with the subscription secret (HMAC in `tempo-signature`), re-runs the
 * SSRF guard, and POSTs it rejecting redirects. The URL is SSRF-validated at
 * construction time too. Deliver with `.deliver({ envelope, secret })`.
 */
export declare function url(url: string): WebhookDestination.Instance<WebhookDestination.Url>;
/**
 * Validates a subscriber URL, rejecting non-`https`, embedded credentials, and
 * private/loopback/link-local/metadata hosts. Returns the parsed URL.
 *
 * This is a static guard; DNS-rebinding defense (resolving + re-checking at
 * delivery time) is layered on later.
 */
export declare function assertDeliverableUrl(input: string): URL;
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