AWS Step Functions can't natively pause for user input via a web form. The recommended approach is to use a Task state with a callback token: your workflow pauses and sends a token to your app, the user enters data on your web form, and your backend resumes the workflow by calling SendTaskSuccess with the token. So yes, hosting a web app or backend to collect input and trigger continuation is the standard solution—AWS doesn't provide a built-in feature for user data entry beyond simple approvals or waiting for a fixed time.