export declare const SIGMA_API_BASE_URLS: readonly ["https://aws-api.sigmacomputing.com", "https://api.us-a.aws.sigmacomputing.com", "https://api.ca.aws.sigmacomputing.com", "https://api.eu.aws.sigmacomputing.com", "https://api.uk.aws.sigmacomputing.com", "https://api.au.aws.sigmacomputing.com", "https://api.in.aws.sigmacomputing.com", "https://api.ch.aws.sigmacomputing.com", "https://api.us.azure.sigmacomputing.com", "https://api.eu.azure.sigmacomputing.com", "https://api.ca.azure.sigmacomputing.com", "https://api.uk.azure.sigmacomputing.com", "https://api.au.azure.sigmacomputing.com", "https://api.sigmacomputing.com", "https://api.sa.gcp.sigmacomputing.com"];
export declare const SIGMA_DEFAULT_API_BASE_URL = "https://aws-api.sigmacomputing.com";
export declare function normalizeSigmaApiBaseUrl(value: string): string | null;
export declare function normalizeSigmaDirectApiBaseUrl(value: string): string | null;
export declare function isSigmaApiBaseUrl(value: unknown): value is string;