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Halcyon just launched its fourth data subscription, the Battery Energy Storage System (BESS) Tracker. We already track gas-fired power generation assets, large load tariffs, and rate case cost of capital proceedings; this subscription deepens and broadens our coverage of US power infrastructure for anyone building, financing, supplying, or underwriting its future. Similar to our other data subscriptions, the BESS Tracker updates monthly, drawing data from every US state public utility or service commission, Federal Energy Regulatory Commission, and ISOs/RTOs, in a corpus of 5.4 million (and counting) documents. As with our other subscriptions, building and updating the tracker means extracting specific, structured data from a wide array of unstructured context. This first version contains over 250 assets with a power capacity greater than 100 megawatts, and includes more than 25 data fields per asset. These fields range from asset ID and relevant docket, to storage capacity and...
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Halcyon has an API now.
Plug it into your favorite AI harness.
Plug it into your carefully crafted internal systems.
Just ask your analyst who’s spent the last year building these workflows.
Hyperscalers, developers, capital allocators, and energy professionals already using Halcyon’s API are building incredible things and enjoying real benefits:
- Minutes of research. Thousands saved in legal fees: Turn hundreds of integrated resource plan filings into a counsel-ready memo in minutes, cutting billable research time.
- Get on the grid and get to business: From gas plants to data centers, compare paths to grid connection backed by filings and accelerate speed to power
- Pressure-test your investment shortlist before committing capital: Evaluate markets side-by-side and catch a top-tier candidate that slipped through the cracks
- Act on who’s building the plant, where, and when: Generate new leads from fresh air permit filings sent straight to your CRM, so sales knows who to call and why.
- Streamline your team’s workflows: Meet your team where they are and automatically integrate market intelligence directly into the tools your team already uses — building a shared Google calendar with key docket milestones and automated notifications, for example.
If you follow Halcyon, you know we are builders at heart. That’s why this post celebrates the torrent of innovative things our customers have already built with our API.
It’s why we choose to talk about outcomes, not features. See some more cool examples here.
It’s why we are offering free trial access to the API. Request access here.
Seriously, just ask your analyst.
Editor’s note: Hopefully we’ve piqued your interest and you’re either grabbing an API key or forwarding this to your analyst so they can grab one. For those who feel like this post is reminiscent of something, we must give credit where credit is due. “Ask your developer” was a famous API campaign run by Twilio encouraging their customers to go straight to the source. We were inspired, and we agree.
