Tax deadline is 6 weeks away and I got tired of paying $150/year to services that want my xpub. So I built Opacore.

Import your xpub, descriptor, or wallet file (Sparrow, Unchained, Coldcard). It syncs your transaction history, calculates your gains (FIFO, LIFO, or HIFO), and spits out a Form 8949-ready CSV. Watch-only — no private keys ever touch the server.

It's also a full portfolio platform if you want it to be — dashboard, DCA tracker, invoice/payment links, fee estimator, price alerts.

Two ways to use it:

opacore.com — hosted, free, just sign up Self-host — Docker Compose, one command, your data stays on your server MIT licensed. No node required. No altcoins.

GitHub: github.com/opacore/opacore Stack: Rust + BDK, Next.js, SQLite