export type ApiClientOptions = {
    tokenFactory: (() => Promise<string | null>) | null;
    endpoint: string;
    application?: string;
    headersFactory?: () => Record<string, string> | Promise<Record<string, string>>;
};
export declare class ApiClient {
    endpoint: string;
    application?: string;
    private _tokens;
    private _headers?;
    constructor({ tokenFactory, endpoint, application, headersFactory, }: ApiClientOptions);
    getToken(): Promise<string | null> | null;
    getHeaders(): Promise<Record<string, string>>;
    static get default(): ApiClient;
    private static _default;
}