type OpenAICompatibleValidationOptions = {
    provider: string;
    apiKey: string;
    baseUrl: string;
    model: string;
    signal?: AbortSignal;
};
type ModelListValidationOptions = {
    provider: string;
    apiKey: string;
    modelsUrl: string;
    signal?: AbortSignal;
};
/**
 * Validate an API key against an OpenAI-compatible chat completions endpoint.
 *
 * Performs a minimal request to verify credentials and endpoint access.
 */
export declare function validateOpenAICompatibleApiKey(options: OpenAICompatibleValidationOptions): Promise<void>;
/**
 * Validate an API key against a provider models endpoint.
 *
 * Useful for providers where access to specific models may vary by plan and
 * should not block key validation.
 *
 * A 200 status alone is NOT accepted: a captive portal, misrouting proxy, or
 * broken gateway can answer 200 with an HTML page or an empty JSON object, and
 * accepting the key on status alone would store a credential that was never
 * actually checked. The body must parse as JSON and carry a recognizable model
 * list before the key is considered validated.
 */
export declare function validateApiKeyAgainstModelsEndpoint(options: ModelListValidationOptions): Promise<void>;
export {};