Based on @jugglinmike ExecutorCDP prototype
grep 'API status' tools/pyppeteer/ -r | grep -Eo "'[A-Z][A-Za-z]+\.[A-Za-z]+'" | sort | uniq -c | sort -rn
5 'Input.dispatchMouseEvent'
4 'Runtime.releaseObject'
4 'Input.dispatchKeyEvent'
3 'Runtime.evaluate'
2 'Page.navigate'
1 'Target.sendMessageToTarget'
1 'Target.getTargets'
1 'Target.closeTarget'
1 'Target.attachToTarget'
1 'Security.setOverrideCertificateErrors'
1 'Security.setIgnoreCertificateErrors'
1 'Security.handleCertificateError'
1 'Security.enable'
1 'Security.certificateError'
1 'Runtime.getProperties'
1 'Page.enable'
1 'Page.captureScreenshot'
1 'DOM.getBoxModel'
1 'DOM.focus'
1 'Browser.setWindowBounds'
1 'Browser.getWindowForTarget'