This is the documentation for ConfiForms Server/Data Center appHowever, this might also work for ConfiForms cloud and in most cases it does. But please see this page to understand the differences between server and cloud versions of the ConfiForms app.
ConfiForms REST APIs for Server/Data Center version. If you are looking for integrations with ConfiForms for Confluence cloud then please refer to REST API for ConfiForms CLOUD
We maintain 2 version of the API. Version 0 and Version 1 (available since ConfiForms 2.18 and supports Confluence PAT tokens as authentication method (https://confluence.atlassian.com/enterprise/using-personal-access-tokens-1026032365.html) and is also accessible through the https://developer.atlassian.com/server/framework/atlassian-sdk/using-the-rest-api-browser/).