Пример работы с стандартизацией DaData на R. Использует пакет httr (https://github.com/r-lib/httr)

clean.r

library(httr)

url <- "https://cleaner.dadata.ru/api/v1/clean/address"

headers <- c(
  "Content-Type" = "application/json",
  Accept = "application/json", 
  Authorization = "Token API_KEY",
  "X-Secret" = "SECRET_KEY")

body <- list("мск сухонска 11/-89")

r <- POST(url = url, 
        config = c(add_headers(headers), accept_json()),  
        body = body,
        encode = "json")

content(r)