This repository scrapes and stores the current blood stock levels on redcross.sg into bloodstocks.json
Disclaimer: This is an unofficial data source: I do not know for sure if these are the exact numbers, but I strongly believe that they are via some educated guesses. Regardless, this information comes without any warranty or guarantees of any sort.
This data is stored in the Flat Data format so that it can be easily visualized / analyzed over time.
Visit this link to view the changes in the GitHub Flat Data Viewer
There's a writeup of this project at my blog.