I'm the developer of an open-source (MIT License) python package to convert SEC submissions into useful data. I've recently put a bunch of stuff in the cloud for a nominal convenience fee.

Cloud:

1. SEC Websocket - notifies you of new submissions as they come out. (Free)

2. SEC Archive - download SEC submissions without rate limits. ($1/100,000 downloads)

3. MySQL RDS ($1/million rows returned)

- XBRL

- Fundamentals

- Institutional Holdings

- Insider Transactions

- Proxy Voting Records

Posting here, in case someone finds it useful.

Links:

Datamule (Package) GitHub: https://github.com/john-friedman/datamule-python

Documentation: https://john-friedman.github.io/datamule-python/datamule-python/sheet/sheet/

Get an API Key: https://datamule.xyz/dashboard2.html