🇺🇸Utilities in United States
41 utilities providers in United States, publishing 66 APIs.
41 providers
66 published APIs
149 indexed documents
Utilities in United States — 41 providers on the APIs.io network sit in both cohorts, and between them they publish 66 indexed APIs.
20 of the 41 publish at least one machine-readable API; 21 publish nothing indexed at all. That split is the first thing worth reading here — a vertical can be well represented in a market and still have almost no programmable surface.
By Kin Score band: 18 minimal, 13 emerging, 6 developing, 2 strong, and 2 thin.
Leading by rating: Pacific Gas and Electric, OpenADR Alliance, Green Button Alliance, MISO, Virtual Peaker, Con Edison, and 35 more.
Country membership reads a tag or a stated headquarters. A provider lands in United States when one of its own top-level tags names the country, or when its own description states a headquarters that names the country or one of its cities (roadmap#542, #719). A description that calls a company by its nationality, or names a city in a phrase that is not a headquarters statement, is not counted, so this cell is a floor, not a census.
Providers (41)
| Provider | Description | APIs | Rating |
|---|---|---|---|
| Pacific Gas and Electric | Pacific Gas and Electric Company is the investor-owned electric and natural gas utility for northern and central California — incorporated in California in 1905, headquartered i... | 1 | strong |
| OpenADR Alliance | The OpenADR Alliance is a San Ramon, California mutual-benefit membership corporation that develops, certifies, and promotes OpenADR, the open information-exchange model utiliti... | 4 | strong |
| Green Button Alliance | The Green Button Alliance (GBA) is the non-profit that stewards, tests and certifies the Green Button standard — the NAESB REQ.21 Energy Services Provider Interface (ESPI) profi... | 3 | developing |
| MISO | MISO — the Midcontinent Independent System Operator — is the not-for-profit Regional Transmission Organization that operates the electric grid and the wholesale electricity mark... | 7 | developing |
| Virtual Peaker | Virtual Peaker is a Louisville, Kentucky software company selling grid-edge DERMS and virtual power plant software to United States and Canadian electric utilities — investor-ow... | 2 | developing |
| Con Edison | Consolidated Edison Company of New York, Inc. (CECONY, trading as Con Edison) is the investor-owned electric, gas and steam utility that serves New York City and Westchester Cou... | 1 | developing |
| Southwest Power Pool | Southwest Power Pool (SPP) is a nonprofit Regional Transmission Organization regulated by the Federal Energy Regulatory Commission and headquartered in Little Rock, Arkansas. Fo... | 1 | developing |
| Genability | Genability is a United States energy-data platform, based in San Francisco and now part of Arcadia, that sells programmatic access to North American electricity tariff data and ... | 1 | developing |
| NAESB | The North American Energy Standards Board (NAESB) is the non-profit, industry-consensus standards development organization formed in 1994 that writes the business practice stand... | 2 | thin |
| Southern California Edison | Southern California Edison (SCE) is the regulated electric utility subsidiary of Edison International, delivering power to roughly 15 million people across a 50,000 square-mile ... | 1 | thin |
| Entergy | Entergy Corporation is an integrated energy company headquartered in New Orleans, Louisiana, providing electricity to more than 3 million utility customers across Arkansas, Loui... | 2 | emerging |
| Berkshire Hathaway | Berkshire Hathaway is a multinational conglomerate holding company headquartered in Omaha, Nebraska. The company's diversified subsidiaries span insurance (GEICO, Berkshire Hath... | 1 | emerging |
| Landis+Gyr | Landis+Gyr Group AG is a 130-year-old energy technology company that builds the smart electricity, gas and water meters, the RF-mesh and cellular networks, and the head-end, met... | 0 | emerging |
| AiDASH | AiDASH is an AI-first vertical SaaS company that uses satellite imagery and machine learning to run operations, maintenance, and climate-resilience programs for industries with ... | 1 | emerging |
| EnergyHub | EnergyHub is a Brooklyn, New York distributed energy resource management system (DERMS) vendor and an independent subsidiary of Alarm.com (Nasdaq ALRM), operating in its home ma... | 2 | emerging |
| Sempra | Sempra is a San Diego-headquartered North American energy infrastructure holding company and a Fortune 500 constituent, operating regulated utilities and energy infrastructure a... | 1 | emerging |
| Southwest Gas | Southwest Gas Holdings is a natural gas distribution company that purchases, distributes, and transports natural gas for customers in Arizona, Nevada, and California. As a Fortu... | 2 | emerging |
| Uplight | Uplight is a Boulder, Colorado energy technology company formed in 2019 from the merger of Tendril and Simple Energy and expanded through the acquisitions of EnergySavvy, FirstF... | 1 | emerging |
| WGL Holdings | WGL Holdings was an integrated energy holding company headquartered in Washington, D.C., serving over 1 million customers across the District of Columbia, Maryland, and Virginia... | 3 | emerging |
| Xcel Energy | Xcel Energy is a major U.S. electricity and natural gas utility holding company headquartered in Minneapolis, Minnesota, providing service to approximately 3.7 million electrici... | 29 | emerging |
| Nexamp | Nexamp is a Boston-based clean energy company, founded in 2007 by two U.S. Army veterans, that develops, builds, owns and operates distributed solar generation and battery stora... | 0 | emerging |
| Vistra | Vistra Corp (NYSE: VST) is an Irving, Texas integrated retail electricity and power generation company and the largest competitive power generator in the United States, operatin... | 0 | emerging |
| Beyond Limits | Beyond Limits (trading as BeyondAI) is an enterprise and industrial artificial intelligence company founded in 2014 and headquartered in Glendale, California, built on cognitive... | 0 | emerging |
| Solaren | Solaren is a combination energy and aerospace company headquartered in Manhattan Beach, California, founded in 2001 by a team of satellite engineers and space scientists. Solare... | 0 | minimal |
| ConnectDER | ConnectDER is a Philadelphia-based clean energy hardware company and the leading US manufacturer of meter socket adapters (MSAs, also called meter collars) for the residential m... | 0 | minimal |
| Sempra Energy | Sempra Energy is a San Diego-headquartered North American energy infrastructure holding company and a Fortune 500 constituent, operating regulated utilities and energy infrastru... | 1 | minimal |
| AMSC | American Superconductor Corporation (AMSC) is a power control systems company headquartered in Ayer, Massachusetts, and traded publicly on NASDAQ under the ticker AMSC. The comp... | 0 | minimal |
| AutoGrid | AutoGrid Systems is a United States grid-technology company founded in 2011 by Amit Narayan in Redwood City, California, that built AI and machine-learning software for distribu... | 0 | minimal |
| Project Canary | Project Canary is a Denver-based climate technology company that helps oil and gas operators and natural gas utilities turn methane emissions data into operational intelligence.... | 0 | minimal |
| Sealed | Sealed is a New York-based climate technology company, founded in 2012, whose Sealed Pro platform helps home-improvement contractors sell and finance home weatherization and ele... | 0 | minimal |
| Globetouch | Globetouch is a global mobile and IoT connectivity provider founded in 2010 and headquartered in San Ramon, California, which rebranded to Airlinq in February 2020 — globetouch.... | 0 | minimal |
| Exelon | Exelon Corporation is one of the largest energy delivery companies in the United States, serving more than 10 million customers through its regulated electric and gas utility su... | 0 | minimal |
| PSEG | Public Service Enterprise Group (PSEG) is a diversified energy holding company headquartered in Newark, New Jersey. Its regulated utility subsidiary Public Service Electric and ... | 0 | minimal |
| Valor Water Analytics | Valor Water Analytics was a San Francisco-based water analytics company that built financial data and dashboard tools for water utilities, including leak and revenue-loss detect... | 0 | minimal |
| NuScale Power | NuScale Power is a Portland, Oregon-based small modular reactor (SMR) company developing the NuScale Power Module (NPM), a 77 MWe pressurized light-water reactor that is the fir... | 0 | minimal |
| Calpine | Calpine Corporation was a major U.S. energy company headquartered in Houston, Texas, and was the largest generator of electricity from natural gas and geothermal energy in the U... | 0 | minimal |
| Public Service Enterprise Group | Public Service Enterprise Group (PSEG) is a publicly traded diversified energy holding company headquartered in Newark, New Jersey. Through its subsidiaries including PSE&G and ... | 0 | minimal |
| Spectra Energy | Spectra Energy was a Fortune 500 American energy company headquartered in Houston, Texas, focused on natural gas transmission and storage, distribution, and gathering and proces... | 0 | minimal |
| Energy Future Holdings | Energy Future Holdings was a Dallas-based privately held energy company involved in electricity generation, mining, wholesale energy trading, transmission and distribution, and ... | 0 | minimal |
| Puget Energy | Puget Energy is the parent company of Puget Sound Energy (PSE), a regulated electric and natural gas utility serving customers across Washington state. Headquartered in Bellevue... | 0 | minimal |
| DTE Energy | DTE Energy is a Detroit-based diversified energy company involved in the development and management of energy-related businesses and services nationwide, with utility operations... | 0 | minimal |
Indexed API documents (149)
Two numbers, both real: these providers publish 66 APIs as their own documents, which the catalog indexes split one-per-resource into 149 documents.
PG&E Share My Data OAuth 2.0 Authorization API
Pacific Gas and Electric
The OAuth 2.0 authorization server behind Share My Data, implemented to meet the NAESB ESPI authorization profile. Two token classes are ...
Pacific Gas and Electric Application Information API
Pacific Gas and Electric
Application Information endpoints
Pacific Gas and Electric Authorization API
Pacific Gas and Electric
Authorization endpoints
Pacific Gas and Electric Batch API
Pacific Gas and Electric
Batch data transfer endpoints
Pacific Gas and Electric Usage Point API
Pacific Gas and Electric
Usage Point endpoints
PG&E Subscriptions API
Pacific Gas and Electric
Manage data subscriptions for customer accounts.
PG&E Usage API
Pacific Gas and Electric
Retrieve energy usage interval data.
OpenADR Alliance Auth API
OpenADR Alliance
The Auth API from OpenADR Alliance — 2 operation(s) for auth.
OpenADR Alliance Events API
OpenADR Alliance
The events API from OpenADR Alliance — 2 operation(s) for events.
OpenADR Alliance MQTT Notifier API
OpenADR Alliance
The MQTT_notifier API from OpenADR Alliance — 12 operation(s) for mqtt_notifier.
OpenADR Alliance Notifiers API
OpenADR Alliance
The notifiers API from OpenADR Alliance — 1 operation(s) for notifiers.
OpenADR Alliance Programs API
OpenADR Alliance
The programs API from OpenADR Alliance — 2 operation(s) for programs.
OpenADR Alliance Reports API
OpenADR Alliance
The reports API from OpenADR Alliance — 2 operation(s) for reports.
OpenADR Alliance Resources API
OpenADR Alliance
The resources API from OpenADR Alliance — 2 operation(s) for resources.
OpenADR Alliance Subscriptions API
OpenADR Alliance
The subscriptions API from OpenADR Alliance — 2 operation(s) for subscriptions.
OpenADR Alliance Vens API
OpenADR Alliance
The vens API from OpenADR Alliance — 4 operation(s) for vens.
Green Button Third Party (OpenESPI) API
Green Button Alliance
The Third Party side of the OpenESPI reference implementation — ApplicationInformation, Authorization and RetailCustomer operations docum...
Green Button Alliance Application Information API
Green Button Alliance
The ApplicationInformation API from Green Button Alliance — 2 operation(s) for applicationinformation.
Green Button Alliance Authorization API
Green Button Alliance
Authorization endpoints
Green Button Alliance Batch API
Green Button Alliance
Batch data transfer endpoints
Green Button Alliance DataCustodian Integration API
Green Button Alliance
Integration with OpenESPI DataCustodian
Green Button Alliance OAuth2 Client Management API
Green Button Alliance
Manage OAuth2 client registrations
Green Button Alliance OAuth2 Standard API
Green Button Alliance
Standard OAuth2 endpoints
Green Button Alliance OIDC API
Green Button Alliance
OpenID Connect endpoints
Green Button Alliance Usage Point API
Green Button Alliance
Usage Point endpoints
MISO Market Reports
MISO
MISO's long-running bulk market report surface — the second fully anonymous layer of its open market data, and the archive the Data Excha...
MISO File Download API
MISO
The bulk file-retrieval counterpart to MUI 2.0, on the same two client-certificate-gated hosts and documented only in a PDF. MISO's File ...
MISO FTR MPMA Market User API
MISO
The Financial Transmission Rights / Multi-Period Multi-Auction market user API — four SOAP services covering the FTR market itself, aucti...
MISO EDR Service (Electronic Data Reporting)
MISO
A SOAP service for uploading meter data and offer data to MISO, with a published WSDL and six XSD schemas (MdUploadPayload, MdUploadRespo...
MISO CROW API (Outage Scheduling)
MISO
The outage-scheduling interface, built on the CROW product, documented in a PDF reference plus a MISO-specific addendum and shipped with ...
MISO Fuel and Consumables Data Request API
MISO
Data request API for fuel and consumables information, documented in a 171KB PDF API guide on MISO's CDN and nowhere else.
MISO Market Portal Meter Data and Settlement Statements API
MISO
Market Portal API for retrieving meter data and settlement statements, documented in a 1MB PDF on MISO's CDN. Sits alongside the File Dow...
MISO Ace API
MISO
The Ace API from MISO — 1 operation(s) for ace.
MISO Admin API
MISO
The Admin API from MISO — 6 operation(s) for admin.
MISO Aggregated Pnode API
MISO
The Aggregated Pnode API from MISO — 1 operation(s) for aggregated pnode.
MISO Bidding API
MISO
The Bidding API from MISO — 2 operation(s) for bidding.
MISO Binding Constraints API
MISO
The BindingConstraints API from MISO — 3 operation(s) for bindingconstraints.
MISO Contracts API
MISO
The Contracts API from MISO — 4 operation(s) for contracts.
MISO Coordinated Transaction Scheduling API
MISO
The CoordinatedTransactionScheduling API from MISO — 1 operation(s) for coordinatedtransactionscheduling.
MISO Csat Next Day Short Term Reserve Requirement API
MISO
The CsatNextDayShortTermReserveRequirement API from MISO — 1 operation(s) for csatnextdayshorttermreserverequirement.
MISO Csat Supply Demand API
MISO
The CsatSupplyDemand API from MISO — 1 operation(s) for csatsupplydemand.
MISO Day Ahead API
MISO
The Day Ahead API from MISO — 11 operation(s) for day ahead.
MISO Forecast API
MISO
The Forecast API from MISO — 6 operation(s) for forecast.
MISO Fuel Mix API
MISO
The FuelMix API from MISO — 3 operation(s) for fuelmix.
MISO Generation Outages API
MISO
The GenerationOutages API from MISO — 1 operation(s) for generationoutages.
MISO Historical API
MISO
The Historical API from MISO — 1 operation(s) for historical.
MISO IMM API
MISO
The IMM API from MISO — 1 operation(s) for imm.
MISO Interchange API
MISO
The Interchange API from MISO — 9 operation(s) for interchange.
MISO Market Pricing API
MISO
The MarketPricing API from MISO — 6 operation(s) for marketpricing.
MISO Model API
MISO
The Model API from MISO — 1 operation(s) for model.
MISO Notifications API
MISO
The Notifications API from MISO — 6 operation(s) for notifications.
MISO Notifications Format API
MISO
The Notifications Format API from MISO — 7 operation(s) for notifications format.
MISO Offer API
MISO
The Offer API from MISO — 7 operation(s) for offer.
MISO Real Time RSG Commitments API
MISO
The RealTimeRSGCommitments API from MISO — 1 operation(s) for realtimersgcommitments.
MISO Real Time Total Load API
MISO
The RealTimeTotalLoad API from MISO — 1 operation(s) for realtimetotalload.
MISO Regional Directional Transfer API
MISO
The RegionalDirectionalTransfer API from MISO — 1 operation(s) for regionaldirectionaltransfer.
MISO Reports API
MISO
The Reports API from MISO — 14 operation(s) for reports.
MISO Reserves API
MISO
The Reserves API from MISO — 6 operation(s) for reserves.
MISO Snapshot API
MISO
The Snapshot API from MISO — 1 operation(s) for snapshot.
MISO Transactions API
MISO
The Transactions API from MISO — 5 operation(s) for transactions.
MISO Weather API
MISO
The Weather API from MISO — 1 operation(s) for weather.
MISO Wind Solar API
MISO
The WindSolar API from MISO — 7 operation(s) for windsolar.
MISO Realtime API
MISO
The Realtime API from MISO — 17 operation(s) for realtime.
Virtual Peaker Commands API
Virtual Peaker
Command specific endpoints
Virtual Peaker Devices API
Virtual Peaker
Device specific endpoints
Virtual Peaker Energy Interval Endpoint API
Virtual Peaker
The Energy Interval Endpoint API from Virtual Peaker — 1 operation(s) for energy interval endpoint.
Virtual Peaker Group Management API
Virtual Peaker
Virtual Peaker supports managing groups of devices, in addition to individual device control. Grouping enables utilities to target cluste...
Virtual Peaker OAuth Device Discovery (Preferred) API
Virtual Peaker
The OAuth device discovery flow works as follows: 1. The device owner fills out an onboarding form on Virtual Peaker's site. 2. At the en...
Virtual Peaker Pairing Code Device Discovery - End User App API
Virtual Peaker
The [pairing code](./device-partner-api.html#section/Pairing-Codes) device discovery flow works as follows: 1. The device owner fills out...
Virtual Peaker Pairing Code Device Discovery - Utility Commissioned Installation API
Virtual Peaker
The utility commissioned [pairing code](./device-partner-api.html#section/Pairing-Codes) flow could work as follows: 1. The device owner ...
Virtual Peaker Publishing API
Virtual Peaker
All of the endpoints below allow the Device Partner to publish data to the Virtual Peaker platform, which avoids Virtual Peaker having to...
Con Edison Hosting Capacity Map REST API
Con Edison
Con Edison's distribution-grid open data, published as anonymously readable Esri ArcGIS REST feature services behind the public Hosting C...
Con Edison Application Information API
Con Edison
The ApplicationInformation API from Con Edison — 1 operation(s) for applicationinformation.
Con Edison Authorization API
Con Edison
The Authorization API from Con Edison — 3 operation(s) for authorization.
Con Edison Batch API
Con Edison
The Batch API from Con Edison — 4 operation(s) for batch.
Con Edison Electric Power Usage Summary API
Con Edison
The ElectricPowerUsageSummary API from Con Edison — 2 operation(s) for electricpowerusagesummary.
Con Edison Interval Block API
Con Edison
The IntervalBlock API from Con Edison — 2 operation(s) for intervalblock.
Con Edison Local Time Parameters API
Con Edison
The LocalTimeParameters API from Con Edison — 2 operation(s) for localtimeparameters.
Con Edison Meter Reading API
Con Edison
The MeterReading API from Con Edison — 2 operation(s) for meterreading.
Con Edison Reading Type API
Con Edison
The ReadingType API from Con Edison — 2 operation(s) for readingtype.
Con Edison Real Time Batch API
Con Edison
The RealTimeBatch API from Con Edison — 3 operation(s) for realtimebatch.
Con Edison Real Time Interval Block API
Con Edison
The RealTimeIntervalBlock API from Con Edison — 2 operation(s) for realtimeintervalblock.
Con Edison Real Time Reading Type API
Con Edison
The RealTimeReadingType API from Con Edison — 2 operation(s) for realtimereadingtype.
Con Edison Retail Customer API
Con Edison
The RetailCustomer API from Con Edison — 9 operation(s) for retailcustomer.
Con Edison Usage Point API
Con Edison
The UsagePoint API from Con Edison — 2 operation(s) for usagepoint.
Con Edison Service Status API
Con Edison
The Service Status API from Con Edison — 1 operation(s) for service status.
SPP Public Data FTP
Southwest Power Pool
SPP's officially documented programmatic interface to its public data. The SPP Public Data Access guide (v3.0, July 2023) names FTP as th...
SPP Portal Public Data File Browser API
Southwest Power Pool
The HTTP download service behind the SPP Portal public data pages. Anonymous GET requests of the form /file-browser-api/download/{dataset...
SPP Portal Chart API
Southwest Power Pool
JSON and CSV chart feeds serving the SPP Portal dashboards. Confirmed anonymously on 2026-07-27: /chart-api/gen-mix/asChart and /chart-ap...
SPP Price Contour Map ArcGIS REST Services
Southwest Power Pool
An Esri ArcGIS Server REST directory serving the geospatial layers behind SPP's price contour map. Confirmed anonymously on 2026-07-27 at...
SPP Integrated Marketplace Markets Web Service
Southwest Power Pool
The SOAP web and notification services market participants use to submit offers and bids and retrieve results from the SPP Integrated Mar...
Southwest Power Pool Forecasting API
Southwest Power Pool
The Forecasting API operations define the exchange of forecasted ratings, including the 240-hour-ahead forecasted AAR data exchange requi...
Southwest Power Pool Monitoring Sets API
Southwest Power Pool
[Monitoring Sets](https://trolie.energy/concepts#monitoring-sets) are named sets of power system resources that may be used to filter rat...
Southwest Power Pool Seasonal API
Southwest Power Pool
Seasonal ratings are static ratings associated with extended durations, typically months. These are typically used in both planning and o...
Southwest Power Pool Seasonal Overrides API
Southwest Power Pool
A Seasonal Override instructs the system to use a temporary static rating instead of any concurrent Seasonal Rating for a resource. A typ...
Southwest Power Pool Temporary AAR Exceptions API
Southwest Power Pool
A [Temporary AAR Exception](https://trolie.energy/concepts#temporary-aar-exception) is provided by the Ratings Provider when a Ratings Ob...
Southwest Power Pool Realtime API
Southwest Power Pool
If permitted by the Clearinghouse Provider, its Ratings Providers can use these functions to exchange real-time ratings, supplementing or...
Genability GET API
Genability
The GET API from Genability — 1 operation(s) for get.
Genability Rest API
Genability
The Rest API from Genability — 32 operation(s) for rest.
NAESB REQ.21 Energy Services Provider Interface (ESPI)
NAESB
The NAESB REQ.21 ESPI Model Business Practices define the data exchange protocol for transferring retail energy usage information from a ...
NAESB Electric Industry Registry (EIR) webRegistry Web Services
NAESB
The NAESB Electric Industry Registry is the central repository of registry information used by the North American wholesale electric indu...
SCE Green Button Connect My Data
Southern California Edison
SCE's Customer Data Access (CDA) platform, through which a customer can authorize a registered third party to receive their electric usag...
Southern California Edison DRPEP Portal API
Southern California Edison
Undocumented JSON endpoints the DRPEP web app calls directly. Observed answering anonymously; SCE publishes no contract for them.
Southern California Edison Feature Services API
Southern California Edison
The 15 hosted FeatureServers and their layer/table descriptors.
Southern California Edison Query API
Southern California Edison
Attribute and spatial queries against a feature layer or table.
Southern California Edison Server API
Southern California Edison
ArcGIS Enterprise server metadata and the service catalog.
Entergy ArcGIS Server
Entergy
Entergy's electric-network GIS platform at gis.entergy.com, running Esri ArcGIS Server 10.7.1. The service-info document answers anonymou...
Entergy Website (WordPress REST)
Entergy
The public WordPress REST API (wp-json) of the Entergy website at www.entergy.com: the route index of the site's content management syste...
BNSF Railway API
Berkshire Hathaway
The BNSF API Center provides customer APIs for programmatic integration with BNSF Railway freight shipping operations. APIs enable real-t...
AiDASH Status API
AiDASH
The only public, unauthenticated, machine-readable API surface AiDASH exposes. It is the standard Atlassian Statuspage Status API v2 serv...
EnergyHub Mercury Edge Connect API
EnergyHub
Mercury Edge Connect is EnergyHub's standardized integration framework for connecting DER providers (thermostat, battery, EV, EV charger,...
EnergyHub Marketplace API
EnergyHub
The Marketplace API integrates the Mercury/Edge DERMS platform with utility marketplace providers and online retailers so that a consumer...
Sempra Developer Portal APIs
Sempra
Sempra runs a Google Apigee API program. api.sempra.com is the Apigee runtime gateway and developer.sempra.com is an Apigee integrated de...
Southwest Gas My Account API
Southwest Gas
The Southwest Gas My Account API powers the online customer portal and mobile application for natural gas utility customers in Arizona, N...
Southwest Gas Agency Portal API
Southwest Gas
The Southwest Gas Agency Portal provides access for charitable organizations and assistance agencies to look up customer accounts and sub...
Uplight Developer Platform API
Uplight
Uplight markets a Developer Platform that exposes customer, program, eligibility, enrollment, device, and energy-flexibility data to util...
WGL Energy Services
WGL Holdings
WGL Energy Services is an unregulated retail energy subsidiary of WGL Holdings that sells natural gas and electricity to commercial, indu...
WGL Midstream
WGL Holdings
WGL Midstream, Inc. is a subsidiary of Washington Gas Resources engaged in acquiring and optimizing natural gas storage and transportatio...
Hampshire Gas
WGL Holdings
Hampshire Gas Company owns and operates interests in natural gas storage facilities in and around Hampshire County, West Virginia. It pro...
Xcel Energy ApplicationInformation API
Xcel Energy
Third-party application registration metadata used by the Data Custodian.
Xcel Energy Authorization API
Xcel Energy
OAuth 2.0 authorizations granted by retail customers to third-party applications.
Xcel Energy Batch API
Xcel Energy
Bulk Atom feeds aggregating multiple resources for a subscription.
Xcel Energy Configuration API
Xcel Energy
Configuration resource for a device.
Xcel Energy DER API
Xcel Energy
Distributed Energy Resource programs, controls, and settings.
Xcel Energy DeviceCapability API
Xcel Energy
Root resource that lists the function sets supported by the meter.
Xcel Energy ElectricPowerQualitySummary API
Xcel Energy
Aggregate power-quality measurements for a UsagePoint.
Xcel Energy ElectricPowerUsageSummary API
Xcel Energy
Billing-period aggregate summaries of electric power usage.
Xcel Energy EndDevice API
Xcel Energy
End devices managed by the meter (the meter itself and any subordinate devices).
Xcel Energy FunctionSetAssignments API
Xcel Energy
Groups of function sets assigned to an EndDevice by the server operator.
Xcel Energy IntervalBlock API
Xcel Energy
Time-series interval-level energy usage data captured at a meter.
Xcel Energy LocalTimeParameters API
Xcel Energy
Time zone and daylight-savings-time parameters used to interpret interval timestamps.
Xcel Energy Log API
Xcel Energy
Log events emitted by the device.
Xcel Energy Messaging API
Xcel Energy
Text and HTML messages targeted at end-users.
Xcel Energy MeterReading API
Xcel Energy
Container for measured IntervalBlocks captured at a UsagePoint.
Xcel Energy MirrorUsagePoint API
Xcel Energy
Client-supplied mirror usage points used to publish readings to the server.
Xcel Energy PowerStatus API
Xcel Energy
Real-time power flow and battery status for a device.
Xcel Energy ReadingType API
Xcel Energy
Metadata describing the units, multiplier, accumulation, and flow direction of meter readings.
Xcel Energy Registration API
Xcel Energy
EndDevice registration and provisioning state.
Xcel Energy Response API
Xcel Energy
Acknowledgement responses for received events.
Xcel Energy RetailCustomer API
Xcel Energy
Retail customer, account, agreement, service location, and meter information.
Xcel Energy SelfDevice API
Xcel Energy
Convenience resource referring to the device that hosts the API.
Xcel Energy Subscription API
Xcel Energy
Subscription/notification resources for resource-change events.
Xcel Energy Time API
Xcel Energy
Current device time and time-zone configuration.
Xcel Energy UsagePoint API
Xcel Energy
Logical metered points that produce energy usage data for a service.
Xcel Energy Demand Response API
Xcel Energy
Demand Response programs and load control events.
Xcel Energy Device Information API
Xcel Energy
Manufacturer, hardware, and firmware metadata for a device.
Xcel Energy Device Status API
Xcel Energy
Operational status, op-time, and event indicators for a device.
Xcel Energy Service Status API
Xcel Energy
Operational status of the Green Button Connect My Data service.
Sempra Developer Portal APIs
Sempra Energy
Sempra Energy runs a Google Apigee API program. api.sempra.com is the Apigee runtime gateway — an unrouted request returns the genuine Ap...
Other industries in United States
Artificial Intelligence 563
Healthcare 352
Biotechnology & Drug Discovery 306
Digital Health & Telehealth 282
Life Sciences 270
Financial Services 218
Data & Analytics 206
Pharmaceutical 177
Marketing & Advertising 171
Climate & Sustainability 169
Semiconductors & Hardware 167
Cybersecurity & Identity 163
All of United States →
Utilities elsewhere
North America 58
Europe 29
Australia & New Zealand 26
United Kingdom & Ireland 25
Africa 2
DACH (Germany · Austria · Switzerland) 2
France & Iberia 1
Greater China 1
Middle East 1
Nordics 1
🇦🇺 Australia 26
🇬🇧 United Kingdom 25
All of Utilities →
This page is the intersection of two independently computed cohorts:
United States and
Utilities. A provider appears here only when it is
already a member of both. United States membership is matched on tag, stated HQ,
so this is a floor rather than a census — coverage gaps show up here as small numbers, not as absent pages.
Work with this as data
Every country here is available over the APIs.io API and to AI agents over MCP. Countries is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.