Google alerts alternative-question for sz admin

Wasn’t sure where to post this but decided here was best. Overnight my google alert rss feeds have gone down with a http 400 error. I don’t know whether this is permanent or temporary. Have read that google alerts is flaky. Was wondering if you knew of any free alternatives that do the same as google alerts.
I can still access alerts via the web page but would prefer to get alerts via my rss reader.