As a follow up to my earlier question. The problem was indeed obvious in the end. The authentication solution kindly provided by Majo works very well. The problem in my case seemed to be two fold. 1. The access token generated after authentication timing out and needing to be refreshed. 2. The POST ...

Dear Majo, Very many thanks for posting this. It is incredibly helpful. However, I have a different question on how to handle the response object returned from OPS in R. library(httr) library(XML) thermo <- POST("..../rest-services/published-data/search/biblio/?q=ti%3Dthermoanaerobacter", ...