Rstudio- Failed to connect to localhost port 9000: Connection refused

tying to get Eikon API
it works in Rstudio but not Rstudio cloud
error in curl::curl_fetch_memory(url, handle = handle) :
Failed to connect to localhost port 9000: Connection refused
any idea please?

This indicates you are attempting to connect to a server running in rstudio.cloud, so unless you launched the API you are trying to reach within your project, there is nothing to connect to.

thanks but i do the exact same thing in rstudio and rstudio cloud. you mean there is a way to run API within my project in rstudio cloud?

You are likely running something on your local machine that is listening on port 9000 that your R code is connecting to. Whatever that is, it isn't running in rstudio.cloud, and therefore you cannot connect to it. You can either make that server/service publicly available, or you can run it within your project on rstudio.cloud.

Thank you. How to run it within project ?

I have no idea what it is you are running locally to provide advice on how to run it, just that it is listening on port 9000.