Changelog

New updates and improvements to Singularity products.

May 20, 2025

Regional Fossil-Only Carbon Intensity

There's a new endpoint in the Grid Carbon API: generated fossil-only carbon intensity, which represents the combined carbon intensity of all fossil-fuel generators in a region. The endpoint accepts a list of up to 10 regions, so you can also request the fossil-only intensity of a multi-region area.

This fossil-only data can be used as a conservative estimate for the "residual mix emission rate", or the emission rate of power that has not already been claimed through REC purchases or PPAs. See our documentation for a more detailed explanation.

MISO Consumed Emissions

MISO's Consumed Emissions dashboard leveraging CarbonFlow™ is live! We've released a new webpage and API allowing users to explore real-time and historical consumed emissions data at groundbreaking spatial granularity - down to the county level. Read more about our efforts to provide data that is orders of magnitude more detailed than the current industry standard in this new Canary Media article: Read More.

Here's one quote from Singularity's research and policy lead Greg Miller: “Publicly accessible data at the hourly and county level is breaking new ground in the world of grid carbon accounting. This may be for only one region in the U.S. But it proves it’s possible to calculate this data — and other grid operators can do it too, if this data were required more broadly in accounting standards."

Open Grid Emissions

We have released OGE versions v0.5.0 and v0.6.0. The improvements include expanded historical coverage back to 2005, new 2023 data, aggregation at the subplant level, and other methodological and usability improvements. See the full release notes here.

July 3, 2024

Grid Carbon API

We have rebranded our data product to "Grid Carbon API". Aside from a face lift, this update now allows new (trial) users unrestricted access to our historical data for 60 days. Sign up for an account here.

Webhooks

We have made reliability and stability improvements to our webhooks. If you are one of the few customers who have not yet migrated to using our webhooks feature, please reach out to us to get set up!

Marginal data improvements

In both the PJM and SPP regions, our marginal data accuracy has been improved. We now make sure to offer the latest marginal data that is available in both of those regions.

Open Grid Emissions

Over the last quarter, we have released OGE version v0.4.0. The improvements include better validation checks as well as using the IPCC Assessment Report to calculate CO2-equivalent values. See the full release notes here.

March 20, 2024

Webhooks

As promised, we now have webhook support live in production. Instead of tuning your API request frequency to minimize latency, just pick the regions and event types you're interested in, sit back, and let us send you the data the instant it's available. You'll also receive any recent events that were updated after initial release, so you can be confident that you always have the latest and most accurate data.

If this sounds interesting, let us know and we'll get you set up.

New API Endpoints

Two new endpoints in our V2 API: you can now use latitude/longitude coordinates or a ZIP code to look up the correct region code.

Forecast Improvements

We're continually tuning our forecast models to improve predictions, and expanding coverage to more regions. You can now request our new and improved fuel mix and carbon intensity forecasts for all the real-time ISOs (BPA, CAISO, ERCOT, ISONE, MISO, NYISO, PJM, SPP) as well as select other regions (AZPS, PSCO, TEPC, TVA, WACM). If you'd like to see forecasts for a region not listed here, reach out!

Open Grid Emissions

We've released OGE updates several times in the last few months, with the latest version at v0.3.3. Improvements include 2022 data, more data validation, and a number of code infrastructure and documentation updates. See the release notes here: View Release Notes.

September 25, 2023

Québec Data Coverage

Thanks to Hydro Québec's (HQT) recent work to publish their data, we have been able to integrate the HQT region into our data offering. Their data is available by specifying the region as "HQT" when querying our API. Their data is available in realtime and goes back to January 1st, 2019.

Hourly Data Resolution

Most of our API V2 endpoints now accept a new query parameter: "resolution". This allows users to query windows of data with a higher level of data granularity. By default, we previously only offered 5-minute intervals as the data resolution. If you wanted to have hourly summaries of the data, you would have had to do that yourself. Now you can specify "1h" or "5m" to signify that you would like a 1-hour or 5-minute resolution of data. If you do not include the new parameter, the default will be "5m" for all endpoints that accept the "resolution" parameter.

Coming soon: Webhooks

What data is available? When is new data available? When should I query to get the latest data for a region?

Gone are the days of needing to set up complex client-side querying on your end. Instead, we offer a way to subscribe to new data, and receive it as soon as it's available. You can specify which region, event type and URL to send the data to and our infrastructure will handle delivery to your system. This feature will be enabled for paying customers only.

If you'd like to beta test this new feature, please let us know! We'd be happy to set you up.

July 20, 2023

EIA Forecasts

We've got some freshly baked forecasts, ready to serve! In addition to the existing five minute and hourly forecasts available for our real-time ISO regions, we now have hourly fuel mix and carbon intensity forecasts available for EIA regions, always reaching at least 24 hours into the future. At the moment this is only enabled for select regions (PSCO, WACM, and ERCO), but we'll be gradually rolling it out to cover more of the US. If you're interested in forecasting a particular region that we haven't covered yet, feel free to reach out to info@singularity.energy.

Consumed Fuel Mix

New in the V2 API, you can now see the consumed fuel mix of any EIA region, which accounts for imports and exports. You can find more information about what this is and why it's important on our blog.

Compliance API

Our Compliance solution has some new and improved documentation, in addition to new BERDO coverage for buildings in the city of Boston. We'll continue to expand our coverage to more cities and states in the US in the coming months.

Other improvements and fixes

• All regions now return consistent fuel mix categories. Previously, some regions could omit fuels when they didn't produce any power.
• Data availability endpoint now shows expected latency for some regions and event types

March 29, 2023

Security Assessments

As part of our security routine, we regularly engage with third party security firms to perform automated and manual assessments of our APIs and applications. The most recent assessments were completed this month, and found no issues of concern in any of our services.

As noted in previous changelog editions, we've also undergone a full SOC 2 audit resulting in many improvements and a clean bill of health, and that report will be available within the next month.

Please email info@singularity.energy if you'd like copies of these reports or have any other security questions.

Other improvements and fixes

• OGE v0.2.1, fixing some inaccurate emissions and generation totals caused by mismatched data between EIA-860 and EIA-923
• OGE v0.2.2, fixing a bug that impacted CO2 emissions for some parts of the Southeastern US

January 9, 2023

ERCOT

Until now, ERCOT has been the lone major US ISO to not offer real-time fuel mix data. In its absence, we had to make do with their month-behind historical data and EIA's day-behind data. But despair no more, for real-time ERCOT is finally a reality! Try out the ERCOT region code in the /latest and /search endpoints of our API to see what's happening at this moment in Texas.

Historical data has been moved to the ERCOT-H region - use that code to search for data from last year and earlier. Note that historical and real-time data have somewhat different fuel categories for the moment. In the coming months we'll analyze the relationship between the real-time and historical data sources and attempt to unify them.

OGE 2021

Waiting for 2021 Scope 2 emissions factors to complete your annual GHG inventory? Hourly, monthly, and annual-average 2021 factors for all U.S. grid regions are now available to download through the Open Grid Emissions Initiative!

See the full release notes of OGE v0.2.0 for the substantial list of improvements in addition to 2021 data.

The Open Grid Emissions Initiative is based on the same underlying methodology and data sources as the U.S. EPA’s eGRID annual emissions factors, but integrates key innovations from peer-reviewed research to improve the coverage and granularity of the data.

The OGE dataset also includes hourly emissions data for every individual plant in the U.S., as well as other power system operational data, which is useful for analysts, researchers, and policymakers.

We're hiring!

If you know anyone who is passionate about decarbonization, has a few years of software engineering experience, and wants to learn more, check out the job description and please reach out!

October 11, 2022

SOC 2

Adding to the significant security and reliability improvements we've made this year, we've now formally begun the process of SOC 2 certification. We'll now have automated continuous monitoring of our infrastructure from Drata as we work towards a full external audit.

Once certification is complete we'll make the full audit report available to anyone who wants it.

We're hiring!

If you know anyone who is passionate about decarbonization, has product management experience, and wants to learn more, check out the job description and please reach out!

Other improvements and fixes:

• OGE: Fixed an issue affecting consumed emission rates
• OGE: Fixed several issues affecting SO2 calculations
• OGE: Updated AZPS data to handle incorrect reporting

September 9, 2022

Open Grid Emissions Initiative

We are very proud to announce the initial release of Open Grid Emissions (OGE) - an open source dataset of hourly US grid generation, carbon intensity, and air pollution data. Get free access to the data, or read more in our announcement blog post or from Canary Media.

MISO Historical Emissions Map

We're also announcing the public release of our MISO Historical Emissions Map, a collaboration with MISO that shows plant-level historical emissions data going back through 2005. This map builds off the OGE data, and you can select the Daily or Hourly option to explore OGE in an interactive visualization.

We just wanted to express our ongoing commitment to improving this data and tool!

August 11, 2022

Infrastructure Automation

We've spent a substantial amount of effort automating the maintenance and deployment of our entire infrastructure, upgrading most of it along the way for improved security and performance. What does this mean for you? If we've done things correctly, you shouldn't notice anything at all. It's more about what you won't see - no service outages, no performance issues, no security incidents. This effort also lays the groundwork for us to smoothly scale our API to an increasing number of users and an ever-growing amount of data.

The Return of EIA

They were down for more than a month, but happy to announce that EIA systems are finally back online and publishing every day. We've backfilled all data from the period EIA was down, so we once again have full uninterrupted coverage of the continental US.

This was an outage of unprecedented length, and we hopefully won't see anything like it for a long time. When there are issues of this magnitude, you can look for information and updates on our status page, and you may also receive direct communication from us depending on the severity of the issue.