Voltlas data
Every price on Voltlas is free and openly reusable. The same data the site runs on is published as plain JSON — refreshed weekly from official sources, with no API key, no sign-up, and no rate limits. Use it under a Creative Commons Attribution license; just credit Voltlas and link back.
The datasets
COMMODITIES (energy, metals, precious, agriculture), DATA (electricity & gas by country, USD/kWh), FUEL_DATA (petrol & diesel by country, USD/liter), and FX (the reference rates used for USD conversion, with FX_DATE).series.series.series.series. Carbon intensity here is estimated from the mix using standard emission factors, not measured.Note on history in USD: non-USD historical series are converted at a single recent reference rate, so they track price movements in the original currency redrawn in dollars rather than week-by-week exchange-rate swings.
Field reference
nameCommodity name, e.g. “Gold”, “Brent crude oil”catCategory: energy, base, precious, or agpriceLatest price, in USD per the stated unitunitPricing unit, e.g. $/troy oz, $/mt, $/bblchgPercent change versus the prior periodsourceOriginating official source (EIA, World Bank)periodThe period the price representsseriesObject keyed by commodity nameseries[name].unitPricing unit for that commodityseries[name].pointsArray of [“YYYYMmm”, value] monthly pairs, oldest firstQuick start
const res = await fetch("https://voltlas.com/data/latest.json");
const data = await res.json();
// Latest gold price
const gold = data.COMMODITIES.find(c => c.name === "Gold");
console.log(gold.price, gold.unit); // 4587.21 "$/troy oz"
// 25 years of monthly history
const h = await (await fetch("https://voltlas.com/data/commodity-history.json")).json();
console.log(h.series["Gold"].points.slice(-3));
// [ ["2026M03", 4712.5], ["2026M04", 4500.1], ["2026M05", 4587.21] ]License & attribution
The compiled data is offered under Creative Commons Attribution 4.0. You're free to use it commercially or non-commercially, as long as you credit Voltlas. A simple attribution works:
Data: Voltlas (https://voltlas.com), CC BY 4.0
Each price also carries its own originating source (EIA, Eurostat, EC Oil Bulletin, World Bank); please honor those upstream sources' terms where relevant. Full sourcing is on the methodology page.