# How We Built a Real-Time ETS Price Tracker for CBAM Compliance

CBAM certificate costs are directly tied to EU ETS allowance prices — for the 2026 compliance year it's a quarterly average, from 2027 it switches to a weekly average of EU ETS auction closing prices. That sounds like a simple "call an API, store a number" problem. It isn't, and the reasons why taught me more about building reliable data pipelines than anything else in this project. I'm building CBAMTrack, a CBAM compliance platform for EU importers and non-EU exporters, solo, on Next.js App Rou