import type { ToolResult } from "../../types.js";
import type { OutputSelection, ResponsePart } from "../output-selection.js";
export { isTlsCertNameError } from "./retry-policy.js";
export declare function isLoopbackHost(hostname: string): boolean;
export declare function loopbackUrlCandidates(url: string): string[];
interface FetchOptions extends OutputSelection {
    method?: string | undefined;
    body?: string | undefined;
    headers?: Record<string, string> | undefined;
    maxBytes?: number | undefined;
    iOwnThis?: boolean | undefined;
    retries?: number | undefined;
    timeoutMs?: number | undefined;
    responseMode?: "readable" | "raw" | undefined;
    responsePart?: ResponsePart | undefined;
    /**
     * Forward credentials across an origin-changing redirect. Disabled by
     * default so an in-scope endpoint cannot leak supplied auth to another host.
     */
    forwardSensitiveHeaders?: boolean | undefined;
    insecureTls?: boolean | undefined;
    signal?: AbortSignal | undefined;
    authorizeHop?: ((url: string, resolvedAddresses: string[]) => Promise<{
        allowed: boolean;
        reason: string;
    }> | {
        allowed: boolean;
        reason: string;
    }) | undefined;
}
export declare function httpFetch(url: string, options?: FetchOptions): Promise<ToolResult>;