API Reference > itwin-client > iTwinServiceClients > RequestOptions RequestOptions Interface Beta Methods Name Description errorCallback(response: any): ResponseError Optional retryCallback(error: any, response: any): boolean Optional Properties Name Type Description accept undefined | string agent undefined | Agent auth undefined | RequestBasicCredentials body undefined | any buffer undefined | any headers undefined | any method string parser undefined | any progressCallback undefined | ProgressCallback qs undefined | any readStream undefined | any redirects undefined | number responseType undefined | string retries undefined | number stream undefined | any timeout undefined | RequestTimeoutOptions useCorsProxy undefined | boolean Defined in clients/itwin/src/Request.ts Line 91 Last Updated: 29 November, 2022