This reminds me of the sister project of linkedrecords. It is called DJAPI. And API for Data and Jobs.

It was a public API without authentication. Everybody could upload a blob and received an access and encryption key which the client can use to access this particular object. The the client could also trigger a job using the data and producting an outcome. The outcome could then be downloaded and decrypted by the client with the keys.

While linkedrecords is the BaaS part of serverless DJAPI was the FaaS part of it. I've used DJAPI to upload LaTeX files and create a PDF out of it. The actual plan is to merge those projects at some point.