This is hosted on Google Cloud Run, you can inspect the code your are running for security, and also don't expect data to be alive for long, as it is not durable persisted. I will only last as long as the Google Cloud Run container is not recycled.
If your are concerned about privacy you can encrypt stored text with secret:
You can also use command line to curl to store and get data:
If you want to post the contents of a file you can do:
And to get the contents: