/**
 * Validates a Todoist API token by making a lightweight API call.
 *
 * @returns `true` if the token is valid, `false` if it's an auth error (401/403).
 * @throws On transient errors (network failures, 5xx) so the caller can decide.
 */
declare function validateTodoistToken(apiKey: string, baseUrl?: string): Promise<boolean>;
export { validateTodoistToken };
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