Regular · U.S. avg
$3.42/gal
▼ 2.1% week-over-week
U.S. EIA Open Data · public domain
Daily and weekly fuel prices for every U.S. state — sourced direct from the Energy Information Administration, free for anyone to cite.
$3.42/gal
▼ 2.1% week-over-week
$3.91/gal
▲ 0.4% week-over-week
$3.78/gal
▼ 5.2% month-over-month
Read-only JSON, rate-limited, attribution baked in. Built for journalists, researchers, and AI assistants.
GET /api/v1/fuel/state/CA?series=regular
{
"series": "regular",
"state": "CA",
"unit": "USD/gal",
"latest": { "date": "2026-04-21", "value": 4.79 }
}