/**
 * Decode a JWT into its `{ header, payload, signature }` parts without
 * verifying the signature.
 *
 * Works in both browser (`atob`) and Node (`Buffer`) environments.
 */
export declare function decodeJwt(token: string | undefined): {
    header: Record<string, unknown>;
    payload: Record<string, unknown>;
    signature: string;
};
/**
 * Resolve the Amos embed origin (production vs. sandbox) from a render
 * token's decoded payload.
 *
 * Production: `https://js.amos.com`. Sandbox: `https://js-sandbox.amos.com`.
 */
export declare function getEmbedOrigin(renderToken: string): string;