import { AxiosInstance } from "axios";
import { McpError } from "@modelcontextprotocol/sdk/types.js";
export declare class UpworkClient {
    private static instance;
    private client;
    private graphqlEndpoint;
    private secretsClient;
    private credentialManager;
    private currentAccountType;
    constructor();
    setAccount(account: "freelancer" | "agency"): void;
    private getTokensFromAWS;
    private getValidTokens;
    forceRefreshTokens(accountType?: 'freelancer' | 'agency'): Promise<boolean>;
    getTokenAge(accountType?: 'freelancer' | 'agency'): Promise<number | null>;
    graphqlQuery(query: string, variables?: any): Promise<any>;
    getClient(): AxiosInstance;
    static getInstance(): UpworkClient;
    get(endpoint: string, params?: any): Promise<any>;
    post(endpoint: string, data?: any): Promise<any>;
    handleError(error: any): McpError;
}
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