Is there any service that can make an enhanced EDS on a document?

Question

Electronic digital signature

The question is relevant for Russia
Task: automatically send a document via API, receive back its own + detached signature in sig format.

Answer 1

I think any EDO can do this, as part of the internal workflow, now I checked it in my account in Diadoc, sent the document to myself (I made a division and sent it to it), after that you can download the archive with the document signed by him. Diadoc has an API)

Answer 2

Do you need any service here? This is somehow not very safe, the key must be stored in the service
https://habr.com/en/post/550664/