import type { IHttpOperation, IHttpService, IHttpWebhookOperation } from '@stoplight/types';
import type { JSONSchema7 } from 'json-schema';
export declare function isJSONSchema(maybeSchema: unknown): maybeSchema is JSONSchema7;
export declare function isHttpService(maybeHttpService: unknown): maybeHttpService is IHttpService;
export declare function isHttpOperation(maybeHttpOperation: unknown): maybeHttpOperation is IHttpOperation;
export declare function isHttpWebhookOperation(maybeHttpWebhookOperation: unknown): maybeHttpWebhookOperation is IHttpWebhookOperation;
export declare function isProperUrl(url: string): boolean;