import { CozeAPI as InnerCozeAPI, type ClientOptions as InnerClientOptions } from '@coze/api';
export interface ClientOptions extends InnerClientOptions {
    onBeforeAPICall?: (options: unknown) => ({
        token?: string;
    } | void) | Promise<{
        token?: string;
    } | void>;
}
export declare class CozeAPI extends InnerCozeAPI {
    options: ClientOptions;
    constructor(options: ClientOptions);
    private getAdapter;
    private applyMixins;
}