Did I do this the right way?

I created a community for a great humor RSS feed called Bits and Pieces. I then sent a message, from Mastodon, to @bot@rss.ponder.cat, and I added the following to the message as the only line in the message:

/add https://www.bitsandpieces.us/feed/ bits_and_pieces@rss.ponder.cat

But there was no response. Did I do it correctly?