I was looking for a similar tool which can generate dynamic images. I missed DynaPictures LTD and was waiting for something similar. I tried Duply as soon as I saw it in one of the FB community and without any expectations.
But, it exceeded my expectations with so many options for creating images - API, form url etc.
Yet to check the road map, but I hope that an entry for Chrome extension will be there with which I can configure my API key and template ID to generate images.
Thank you :)