import http from 'node:http';
import type { LookupFunction } from 'node:net';
import type { NodeAgentOptions } from './node-agents';
export declare class EnvProxyHttpAgent extends http.Agent {
    private readonly router;
    constructor(lookup?: LookupFunction, agentOptions?: NodeAgentOptions);
    addRequest(req: http.ClientRequest, options: http.RequestOptions): void;
}