HTML
Complete reference for the HTML structure of Auco templates — placeholders, signature positioning, automatic fields, and renderer constraints.
JSON
Complete reference for the JSON configuration file — root structure, question types, validations, conditionals, and signature profiles.
External validation
The request question type lets your template call an external HTTP service to validate the user's input and use the service's response to pre-fill other fields in the document. It is intended for scenarios where a single piece of information (a code, a reference ID, a tax ID) can resolve to many pre-known values that the user should not have to type manually.