/**
 * JWT Authentication Provider
 *
 * Handles JWT bearer token authentication with support for:
 * - Pre-existing tokens
 * - OAuth2 token endpoint (client credentials flow)
 * - Automatic token refresh
 */
import { AuthProvider, AuthResult, JWTAuthConfig } from './index.js';
export declare class JWTProvider implements AuthProvider<JWTAuthConfig> {
    readonly type: "jwt";
    authenticate(config: JWTAuthConfig): Promise<AuthResult>;
    refresh(config: JWTAuthConfig): Promise<AuthResult>;
    clear(config: JWTAuthConfig): Promise<void>;
    validate(config: JWTAuthConfig): Promise<boolean>;
    private fetchToken;
    private createTokenResult;
    private getCacheKey;
}