so I’ve noticed that quite a few of you are wanting a reliable source of earnings data and dates. Also implied volatility and historical vol. This is not an ad as we have no fiscal relationship with them, It’s just a clean, easy and accurate alternative to the other sources we use. Here’s the link: www.hedginglab.com
they have api’s and csv downloads. Also a LOT of other data we use to bench check other sources. For $10/ month it’s working for us. They also have a $108 annual plan ( that’s the one we use). They also have stock screeners and option earnings trade screener that seem to be pretty useful for the odd binary event strangle.