Fill OTP forms within cross-origin iframes with WebOTP API | Articles | web.dev

SMS OTPs (one-time passwords) are commonly used to verify phone numbers, for example as a second step in authentication, or to verify payments on the web. However, switching between the browser and the SMS app, to copy-paste or manually enter the OTP makes it easy to make mistakes and adds friction to the user experience. The WebOTP API gives websites the ability to programmatically obtain the one