/** Matches `{name}` globally; capture group `1` contains the name. */
declare const SERVER_VARIABLE_REGEX: RegExp;
/**
 * Substitute `{name}` server variables, converting resolved values to strings.
 *
 * @param url Server URL template.
 * @param variables Values by name: primitives or `{ default: value }` objects. Defaults to `{}`.
 * @param resolveMissing Optional fallback for unresolved names; returning `undefined` preserves the template.
 * @returns Substituted URL, with unresolved templates unchanged.
 */
declare function substituteServerVariables(url: string, variables?: Record<string, unknown>, resolveMissing?: (name: string) => unknown): string;
declare function stripTrailingSlash(url: string): string;
/**
 * Normalize a server URL **without validation**:
 * - Default missing schemes to HTTPS.
 * - Use `https://example.com` for empty URLs and root-relative paths.
 * - Remove one trailing `/`, preserving variable templates.
 *
 * @param url Server URL or template.
 * @param urlForProtocolCheck Resolved URL for scheme detection; defaults to `url`.
 * @returns Normalized URL.
 */
declare function normalizeURL(url: string | undefined, urlForProtocolCheck?: string | undefined): string;

export { SERVER_VARIABLE_REGEX, normalizeURL, stripTrailingSlash, substituteServerVariables };