Beacon · Live

A price even a 10× attacker can’t move.

Engine ready

Every button below runs the real Beacon oracle — it aggregates signed quotes from registered sources into an integer median, rejects outliers, drops forged signatures, ignores untrusted sources, enforces freshness, and fails closed: a thin or stale feed yields no price, never a wrong one. Price-oracle manipulation is the #1 DeFi exploit class; Beacon’s only job is to be un-manipulable. Pure logic; no real feed, no keys you trust us with, nothing broadcast.

Five ways to attack a price feed — all defeated

Each button drives a different real aggregation over signed BTC-USD quotes (5% outlier band, 300 s freshness, ≥3 sources). The engine, not this page, computes every result.

HTTP · real Beacon engine response

Raw engine JSON (status, resolved price, sources used vs received, rejection reason)

Runs the real Beacon oracle — integer median, outlier rejection, signature checks, freshness, fail-closed. Pure logic; nothing broadcast. Want the production oracle wired to your own signed sources and consumers? Talk to us →