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Halcyon has an API now.
Search
Search millions of energy dockets, filings, and regulatory documents. Filter by Topic, Keywords, and Filing Type — and ask follow-up questions in plain English. Halcyon combines the precision of structured search with the ability to understand what you actually want to find.
SEE EXAMPLE QUERY Responses
Follow Oracle's Data Center Development
960 Filtered DocumentsSummarize Recent Texas SB6 Intervenors
122 Filtered DocumentsPG&E 2027 Rate Card
1 Filtered Docket
Alerts
Energy filings can run hundreds of pages. Knowing they're new isn't the same as knowing what changed. Halcyon's Alerts combine precise search filters with AI-powered analysis — so you get the signal, not the stack.
SUBSCRIBE TO A HALCYON CURATED ALERT
Geothermal
Monitor geothermal forecasts, evaluations, reports, and projects across the U.S.
~25 documents per alertTX Senate Bill 6
Monitor the PUCT rulemaking, recommendations, and impact of TX Senate Bill 6
~7 documents per alertData Centers powered by Gas
Monitor Data Centers powered by Gas across the U.S.
~59 documents per alert
Data Subscriptions
Most energy data is too expensive, too stale, or too much work to build in-house.
Halcyon's Data Subscriptions give you asset-level precision across gas plants, large load tariffs, rate cases, battery storage, and new substations — sourced from authoritative regulatory filings, updated monthly.
SEE DATA SUBSCRIPTION PREVIEW
Gas Power Plant Tracker
Track planned U.S. gas plants, with asset-level technology, timelines, prices, and changes
538 Gas Plants - Updated Oct 22Large Load Tariff Tracker
State-level market intelligence on how utilities are engaging with data centers and other large load customers
310 Large Load Tariffs - Updated Oct 19New Substation Development Tracker
Track planned U.S. substations, with asset-level development, timelines, prices, and changes
5924 Substations - Updated Oct 20
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If you’re a Real One™, you may have gotten sporadic emails from Be Advised, a low-bandwidth, low-latency email service surfacing hot intel on (mostly)speed-to-powerfor AI data centers. They have been fun to write—and even more fun to see people share! And now that we’ve sent more than a hundred Be Advised notes, I have some takeaways on how AI compute is actually getting power.