Mark thank you, I'd been looking for integrations but not the API route stupidly!! They haven't exposed the API and have no plans to do so (other than Alexa it seems) so that'll rule this one out!
Someone has already done the hard work of decoding the API. But since for some reason the forum will not allow me to post links, just search for "mcolyer anova oven api".
Unfortunately, I am having trouble using that API, because the anova "accounts" do not seem to use a password anymore - just a code sent via email. More details on a HomeAssistant thread - community[.]home-assistant[.]io/t/anova-precision-oven/541722