import type { MatonService } from "./client.js";
export declare function buildServiceNotConnectedMessage(service: MatonService): string;
export declare function buildNoApiKeyMessage(): string;
export declare function isNotConnectedError(error: string): boolean;
export type GuardResult = {
    blocked: true;
    message: string;
} | {
    blocked: false;
};
export declare function checkMatonGuard(apiKey: string | null, service: MatonService, responseStatus?: number): GuardResult;