ISO New England
ISO New England Inc. is the independent, nonprofit regional transmission organization authorized by the Federal Energy Regulatory Commission to operate the high-voltage power system, administer the wholesale electricity markets, and plan the power system for Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, and most of Maine. Home market is the United States. It sits at the wholesale layer of the value chain, between generators, transmission owners, interconnections with New York and Canada, and the load-serving entities that resell power to retail customers - and it states on its own site that handling retail electricity is something it does not do. Its API posture is the sector's classic split, read from the wholesale end. Market and system data is genuinely open, so open that the ISO Express portal serves full nodal day-ahead LMP files as anonymous CSV and the public dashboards are backed by an anonymous JSON feed. Consumer data does not exist here at all, and cannot, because ISO New England holds no retail customer relationships and no Green Button, ESPI, or consumer data-portability mandate reaches it. The one documented programmatic contract, the Web Services API v1.1, is a real, richly documented RESTful surface of 477 path templates across 90 market and operations resources, but it answers 401 to anonymous callers - a developer must first create a free, self-serve ISO Express account, which the ISO says automatically grants access to the data feeds, and then authenticate with HTTP Basic over SSL.
ISO New England publishes 91 APIs on the APIs.io network, including Actualinterchange API, Ams API, Capacityscarcitycondition API, and 88 more. Tagged areas include Energy, United States, Electricity, Energy Markets, and Grid.
ISO New England’s developer surface includes authentication, code examples, changelog, developer portal, API reference, documentation, signup flow, and 37 more developer resources.
Kin Score
APIs 91
Individual APIs this provider publishes, each with its own machine-readable definition.
ISO New England Actualinterchange API
4 path template(s) under /actualinterchange in the published ISO New England Web Services API v1.1 documentation.
ISO New England Ams API
4 path template(s) under /ams in the published ISO New England Web Services API v1.1 documentation.
ISO New England Capacityscarcitycondition API
6 path template(s) under /capacityscarcitycondition in the published ISO New England Web Services API v1.1 documentation.
ISO New England Combinedhourlydemand API
3 path template(s) under /combinedhourlydemand in the published ISO New England Web Services API v1.1 documentation.
ISO New England Daasreservedata API
3 path template(s) under /daasreservedata in the published ISO New England Web Services API v1.1 documentation.
ISO New England Daasstrikeprices API
3 path template(s) under /daasstrikeprices in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dailyofferthreshprice API
5 path template(s) under /dailyofferthreshprice in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadconstraints API
4 path template(s) under /dayaheadconstraints in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadhourlydemand API
6 path template(s) under /dayaheadhourlydemand in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadhourlyoperatingreserve API
6 path template(s) under /dayaheadhourlyoperatingreserve in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadlmpavgcongestion API
5 path template(s) under /dayaheadlmpavgcongestion in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadprdclearing API
5 path template(s) under /dayaheadprdclearing in the published ISO New England Web Services API v1.1 documentation.
ISO New England Dayaheadvirtualproxy API
6 path template(s) under /dayaheadvirtualproxy in the published ISO New England Web Services API v1.1 documentation.
ISO New England Drdispatch API
6 path template(s) under /drdispatch in the published ISO New England Web Services API v1.1 documentation.
ISO New England Drtp API
5 path template(s) under /drtp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fcmabp API
4 path template(s) under /fcmabp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fcmara API
4 path template(s) under /fcmara in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fcmmbp API
4 path template(s) under /fcmmbp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fcmmra API
4 path template(s) under /fcmmra in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fifteenminuteconstraints API
5 path template(s) under /fifteenminuteconstraints in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fifteenminuteinterchange API
6 path template(s) under /fifteenminuteinterchange in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fifteenminutelmp API
5 path template(s) under /fifteenminutelmp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminuteconstraints API
4 path template(s) under /fiveminuteconstraints in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminuteestimatedzonalload API
5 path template(s) under /fiveminuteestimatedzonalload in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminuteexternalflow API
7 path template(s) under /fiveminuteexternalflow in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminutelmp API
14 path template(s) under /fiveminutelmp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminutercp API
7 path template(s) under /fiveminutercp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminutereserveprice API
13 path template(s) under /fiveminutereserveprice in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminutesystemload API
4 path template(s) under /fiveminutesystemload in the published ISO New England Web Services API v1.1 documentation.
ISO New England Fiveminutezonalloadforecast API
3 path template(s) under /fiveminutezonalloadforecast in the published ISO New England Web Services API v1.1 documentation.
ISO New England Forecastcapacity API
6 path template(s) under /forecastcapacity in the published ISO New England Web Services API v1.1 documentation.
ISO New England Frmdtp API
5 path template(s) under /frmdtp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Ftrauctionclearingprices API
4 path template(s) under /ftrauctionclearingprices in the published ISO New England Web Services API v1.1 documentation.
ISO New England Ftrauctionresults API
4 path template(s) under /ftrauctionresults in the published ISO New England Web Services API v1.1 documentation.
ISO New England Genfuelmix API
6 path template(s) under /genfuelmix in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbannualftrauction API
4 path template(s) under /hbannualftrauction in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdaasardoffer API
3 path template(s) under /hbdaasardoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdaasdrroffer API
3 path template(s) under /hbdaasdrroffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdaasenergyoffer API
3 path template(s) under /hbdaasenergyoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdayaheadardbid API
4 path template(s) under /hbdayaheadardbid in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdayaheaddemandbid API
6 path template(s) under /hbdayaheaddemandbid in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdayaheaddrrbid API
3 path template(s) under /hbdayaheaddrrbid in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdayaheadenergyoffer API
4 path template(s) under /hbdayaheadenergyoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbdayaheadloadresponseoffer API
4 path template(s) under /hbdayaheadloadresponseoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbfcmara API
5 path template(s) under /hbfcmara in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbfcmmra API
4 path template(s) under /hbfcmmra in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbforwardreserveauctionoffer API
3 path template(s) under /hbforwardreserveauctionoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbimportexport API
4 path template(s) under /hbimportexport in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbmonthlyftrauction API
4 path template(s) under /hbmonthlyftrauction in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbrealtimeardbid API
4 path template(s) under /hbrealtimeardbid in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbrealtimedrrbid API
3 path template(s) under /hbrealtimedrrbid in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbrealtimeenergyoffer API
4 path template(s) under /hbrealtimeenergyoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hbregulationoffer API
4 path template(s) under /hbregulationoffer in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlybainterchange API
4 path template(s) under /hourlybainterchange in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyfinalreserveprice API
7 path template(s) under /hourlyfinalreserveprice in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlylmp API
24 path template(s) under /hourlylmp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyloadforecast API
5 path template(s) under /hourlyloadforecast in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyloadgeninterchange API
4 path template(s) under /hourlyloadgeninterchange in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyper API
5 path template(s) under /hourlyper in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyprelimreserveprice API
7 path template(s) under /hourlyprelimreserveprice in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlyrcp API
8 path template(s) under /hourlyrcp in the published ISO New England Web Services API v1.1 documentation.
ISO New England Hourlysysload API
8 path template(s) under /hourlysysload in the published ISO New England Web Services API v1.1 documentation.
ISO New England Lmp Index API
12 path template(s) under /lmpIndex in the published ISO New England Web Services API v1.1 documentation.
ISO New England Loadzonencpc API
6 path template(s) under /loadzonencpc in the published ISO New England Web Services API v1.1 documentation.
ISO New England Locations API
3 path template(s) under /locations in the published ISO New England Web Services API v1.1 documentation.
ISO New England Monthlyassetncpc API
4 path template(s) under /monthlyassetncpc in the published ISO New England Web Services API v1.1 documentation.
ISO New England Monthlylmpindex API
4 path template(s) under /monthlylmpindex in the published ISO New England Web Services API v1.1 documentation.
ISO New England Monthlyper API
5 path template(s) under /monthlyper in the published ISO New England Web Services API v1.1 documentation.
ISO New England Morningreport API
6 path template(s) under /morningreport in the published ISO New England Web Services API v1.1 documentation.
ISO New England Ncpc API
5 path template(s) under /ncpc in the published ISO New England Web Services API v1.1 documentation.
ISO New England Networkload API
4 path template(s) under /networkload in the published ISO New England Web Services API v1.1 documentation.
ISO New England Nextdayoperationalcapacityreport API
4 path template(s) under /nextdayoperationalcapacityreport in the published ISO New England Web Services API v1.1 documentation.
ISO New England Nodalloadstat API
3 path template(s) under /nodalloadstat in the published ISO New England Web Services API v1.1 documentation.
ISO New England Nodalloadweight API
6 path template(s) under /nodalloadweight in the published ISO New England Web Services API v1.1 documentation.
ISO New England Outages API
20 path template(s) under /outages in the published ISO New England Web Services API v1.1 documentation.
ISO New England Performancescore API
4 path template(s) under /performancescore in the published ISO New England Web Services API v1.1 documentation.
ISO New England Powersystem API
2 path template(s) under /powersystem in the published ISO New England Web Services API v1.1 documentation.
ISO New England Powersystemconditions API
4 path template(s) under /powersystemconditions in the published ISO New England Web Services API v1.1 documentation.
ISO New England Pricerespevent API
5 path template(s) under /pricerespevent in the published ISO New England Web Services API v1.1 documentation.
ISO New England Realtimeconstraints API
9 path template(s) under /realtimeconstraints in the published ISO New England Web Services API v1.1 documentation.
ISO New England Realtimehourlydemand API
6 path template(s) under /realtimehourlydemand in the published ISO New England Web Services API v1.1 documentation.
ISO New England Realtimehourlyoperatingreserve API
6 path template(s) under /realtimehourlyoperatingreserve in the published ISO New England Web Services API v1.1 documentation.
ISO New England Reliabilityregionloadforecast API
5 path template(s) under /reliabilityregionloadforecast in the published ISO New England Web Services API v1.1 documentation.
ISO New England Schedule2varstatus API
4 path template(s) under /schedule2varstatus in the published ISO New England Web Services API v1.1 documentation.
ISO New England Seasonalpeakhourdata API
4 path template(s) under /seasonalpeakhourdata in the published ISO New England Web Services API v1.1 documentation.
ISO New England Sevendayforecast API
5 path template(s) under /sevendayforecast in the published ISO New England Web Services API v1.1 documentation.
ISO New England Sevendaywindpowerforecast API
4 path template(s) under /sevendaywindpowerforecast in the published ISO New England Web Services API v1.1 documentation.
ISO New England Singlesrccontingencylimits API
6 path template(s) under /singlesrccontingencylimits in the published ISO New England Web Services API v1.1 documentation.
ISO New England Totaltransfercapability API
5 path template(s) under /totaltransfercapability in the published ISO New England Web Services API v1.1 documentation.
ISO New England Weeklylmpindex API
4 path template(s) under /weeklylmpindex in the published ISO New England Web Services API v1.1 documentation.
ISO New England Whlsecost API
8 path template(s) under /whlsecost in the published ISO New England Web Services API v1.1 documentation.
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Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
ISO New England Web Services API v1.1
OPEN COLLECTIONArazzo Workflows 2
Multi-step API workflows described with the Arazzo specification.
ISO New England grid snapshot
Build a complete current picture of the New England power system - resolve the location registry, check feed freshness, then pull system load, generation fuel mix, Hub price and...
ARAZZOISO New England price spike diagnosis
Explain a price event on a past operating day: pull the day-ahead hourly prices, the day's transmission constraints, the fuel mix and the demand-response dispatch, then correlat...
ARAZZOJSON Schema 1
Standalone JSON Schema definitions for this provider's data models.
Examples 14
Example request and response payloads for these APIs.
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Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 4
Portal, sign-up, and the first successful call
Documentation 5
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
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Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 4
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 5
The organization behind the API
Other 4
Properties that don't map to a standard resource type
Source (apis.yml)
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