APIs to build (y)our energy future

Engage your customers with key insights about their homes and utility info, all delivered via API.

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Input any address and get a 12-month estimate of the following:

Electricity Estimation

Electricity Estimation

Full-year estimate of hourly energy usage (kWh) and bill cost ($) for a given residential home.

Carbon Footprint Estimation

Carbon Footprint Estimation

Returns the electricity source mix and annual estimated carbon footprint in pounds of CO2 for a home or portfolio of homes.

Solar Estimation

Solar Estimation

High-level solar system sizing for a given home with estimated costs and lifetime savings opportunity.

Easy access to essential utility information

Utility Rate Database

Utility Rate Database

WattBuy has developed a Utility Rate Database that is machine-learning driven and expert-validated to deliver 95%+ accuracy on utility rates and tariffs across the country.

Utility Lookup Information

Utility Lookup Information

The Utility Information Lookup tool can return the electric distribution utility for any residential address in the United States, along with that utility's website and contact information.

ESI ID Lookup

ESI ID Lookup

In Texas, customer meters have unique identifiers called ESI IDs. The ESI ID Lookup API has compiled an address-to-ESI database to enable electricity switching and other meter services.

Interested?

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Don’t need a lot of data or just exploring?

Create an account on our Developer Portal to explore the documentation and test drive the APIs. We’ve given you a limited number of daily calls to get started. If that’s enough for you, feel free to get straight to work.

Make it official

Ready to build something big? Contact our sales team to get full licensed access.

Here for Education or Government?

.gov and .edu email addresses are by default given up to 1,000 API calls per day. We believe in the key role education and government play in fighting climate change, so no need to waste time talking to us. Need lots of data? Contact our sales team.