/** Mint a 24h HS256 JWT (with `allow_join`) from an API key + secret. Prefer {@link resolveAuthToken}. */
export declare function mintJwt(apiKey: string, secret: string): string;
/** Resolve the Zero Runtime auth token: `explicit` arg -> `ZRT_AUTH_TOKEN` -> minted from `ZRT_API_KEY`+`ZRT_SECRET_KEY`. Throws if none available. */
export declare function resolveAuthToken(explicit?: string): string;