The largest single data source in this API by series count. A U.S.
government work - public domain, with an explicit redistribution
permission and one real, concrete condition: a dated acknowledgment,
which every API response carrying EIA data now includes via a real
X-Data-Attribution header.
| Series | Id | Frequency |
|---|---|---|
| Henry Hub natural gas spot price | RNGWHHD | Daily |
| WTI crude spot price (Cushing) | RWTC | Daily |
| Brent crude spot price (Europe) | RBRTE | Daily |
| Natural gas storage, 8 regions | NW2_EPG0_* | Weekly |
| U.S. electricity retail sales | — | Monthly |
GET /v1/series?series_id=RNGWHHD
Derived factors built from this data: storage percentile, crude spread mean reversion.
Full validation methodology and every real number behind these verdicts: FACTOR_CATALOGUE.md.
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