/**
 * Optional auth for the Agent Hub MCP server.
 *
 * Unlike the workflow MCP (which requires auth), the hub works without auth
 * for public agents. Auth is only needed for private/org agents.
 *
 * Auth sources (in priority order):
 * 1. CURSELL_API_TOKEN env var
 * 2. Saved credentials at ~/.cursell/credentials.json
 *
 * If neither is available, the server runs in public-only mode.
 */
/**
 * Try to load auth token. Returns null if no credentials found.
 * Never blocks or prompts — this is best-effort.
 */
export declare function loadToken(): Promise<string | null>;