I've always missed a "EUR stablecoin" category on coingecko, and when I came across usdc.cool a while ago, I thought it would be nice to have something similar for Euro stablecoins.

Codex pretty much one-shotted this, as in, the first version was basically functional. Surprisingly, it completely figured out how to get data directly from blockchain nodes of chains as diverse as XRP, Cosmos and Solana, including identifying public RPCs that work.