ISO New England

ISO New England Sevendayforecast API

5 path template(s) under /sevendayforecast in the published ISO New England Web Services API v1.1 documentation.

Documentation GitHub OpenAPI

Business capability

Operational Planning BC-3830.30

Operations 5

GET /sevendayforecast Default resource #

GET /sevendayforecast/current Get the current SDF #

GET /sevendayforecast/day/{day} Get most recent Day SDFs #

GET /sevendayforecast/day/{day}/all Get entire Day SDFs #

GET /sevendayforecast/info Get the Service Info for SDF #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/iso-new-england-sevendayforecast-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Sevendayforecast API
  version: '1.1'
  description: RESTful interface to ISO New England energy and market data.
  contact:
    name: ISO New England Ask ISO
    url: https://askiso.iso-ne.com/s/
  x-provenance:
    method: derived
    derived_by: API Evangelist enrichment pipeline
    derived_on: '2026-07-27'
    sources:
    - https://webservices.iso-ne.com/docs/v1.1/
    - https://webservices.iso-ne.com/docs/v1.1/ns0.xsd
    - https://webservices.iso-ne.com/docs/v1.1/ns1.xsd
    - https://www.iso-ne.com/participate/support/web-services-data
    not_provider_published: true
    note: Derived from provider-published HTML documentation and XSDs. Not an ISO New England artifact.
servers:
- url: https://webservices.iso-ne.com/api/v1.1
  description: Production base path (HTTP Basic over SSL)
security:
- basicAuth: []
tags:
- name: sevendayforecast
  description: 5 path template(s) under /sevendayforecast in the published ISO New England Web Services API v1.1 documentation.
paths:
  /sevendayforecast:
    get:
      operationId: getSevendayforecast
      summary: Default resource
      description: Default resource. Redirects to SDF.
      tags:
      - sevendayforecast
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                description: Response payload is not described in the published documentation.
            application/json:
              schema:
                description: Response payload is not described in the published documentation.
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.sevendayforecast.html
        harvested: '2026-07-27'
  /sevendayforecast/current:
    get:
      operationId: getSevendayforecastCurrent
      summary: Get the current SDF
      description: Get the current SDF.
      tags:
      - sevendayforecast
      responses:
        '200':
          description: a SevenDayForecastsElement containing the current SDFs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
            application/json:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
              example:
                SevenDayForecasts:
                  SevenDayForecast:
                  - CreationDate: '2026-07-27T09:14:58.000-04:00'
                    MarketDay:
                    - OtherGenOutagesMw: 1786
                      DelistMw: 971
                      MarketDate: '2026-07-28T00:00:00.000-04:00'
                      TotAvailGenImportMw: 29332
                      ColdWeatherWarn: N
                      PowerWatch: N
                      CsoMw: 26707
                      ColdWeatherWatch: N
                      Weather:
                        CityWeather:
                        - HighTempF: 78
                          DewPointF: 66
                          CityName: Boston
                        - HighTempF: 77
                          DewPointF: 69
                          CityName: Hartford
                      ColdWeatherEvent: N
                      ReplReserveReqMw: 160
                      PeakImportMw: 3440
                      PeakLoadMw: 17630
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 19838
                      SurplusDeficiencyMw: 9494
                      DrrMw: 245
                      Day: 2
                      TotAvailGenMw: 25892
                      ColdWeatherOutagesMw: 0
                    - OtherGenOutagesMw: 2232
                      DelistMw: 971
                      MarketDate: '2026-07-29T00:00:00.000-04:00'
                      TotAvailGenImportMw: 28886
                      ColdWeatherWarn: N
                      PowerWatch: N
                      CsoMw: 26707
                      ColdWeatherWatch: N
                      Weather:
                        CityWeather:
                        - HighTempF: 69
                          DewPointF: 65
                          CityName: Boston
                        - HighTempF: 73
                          DewPointF: 68
                          CityName: Hartford
                      ColdWeatherEvent: N
                      ReplReserveReqMw: 160
                      PeakImportMw: 3440
                      PeakLoadMw: 16390
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 18598
                      SurplusDeficiencyMw: 10288
                      DrrMw: 245
                      Day: 3
                      TotAvailGenMw: 25446
                      ColdWeatherOutagesMw: 0
                    - OtherGenOutagesMw: 2397
                      DelistMw: 971
                      MarketDate: '2026-07-30T00:00:00.000-04:00'
                      TotAvailGenImportMw: 28721
                      ColdWeatherWarn: '-'
                      PowerWatch: N
                      CsoMw: 26707
                      ColdWeatherWatch: '-'
                      Weather:
                        CityWeather:
                        - HighTempF: 69
                          DewPointF: 65
                          CityName: Boston
                        - HighTempF: 74
                          DewPointF: 64
                          CityName: Hartford
                      ColdWeatherEvent: '-'
                      ReplReserveReqMw: 160
                      PeakImportMw: 3440
                      PeakLoadMw: 16160
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 18368
                      SurplusDeficiencyMw: 10353
                      DrrMw: 245
                      Day: 4
                      TotAvailGenMw: 25281
                      ColdWeatherOutagesMw: 0
                    - OtherGenOutagesMw: 2506
                      DelistMw: 971
                      MarketDate: '2026-07-31T00:00:00.000-04:00'
                      TotAvailGenImportMw: 28942
                      ColdWeatherWarn: '-'
                      PowerWatch: N
                      CsoMw: 26707
                      ColdWeatherWatch: '-'
                      Weather:
                        CityWeather:
                        - HighTempF: 74
                          DewPointF: 63
                          CityName: Boston
                        - HighTempF: 80
                          DewPointF: 64
                          CityName: Hartford
                      ColdWeatherEvent: '-'
                      ReplReserveReqMw: 160
                      PeakImportMw: 3770
                      PeakLoadMw: 16920
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 19128
                      SurplusDeficiencyMw: 9814
                      DrrMw: 245
                      Day: 5
                      TotAvailGenMw: 25172
                      ColdWeatherOutagesMw: 0
                    - OtherGenOutagesMw: 2560
                      DelistMw: 971
                      MarketDate: '2026-08-01T00:00:00.000-04:00'
                      TotAvailGenImportMw: 29135
                      ColdWeatherWarn: '-'
                      PowerWatch: N
                      CsoMw: 26754
                      ColdWeatherWatch: '-'
                      Weather:
                        CityWeather:
                        - HighTempF: 78
                          DewPointF: 64
                          CityName: Boston
                        - HighTempF: 83
                          DewPointF: 65
                          CityName: Hartford
                      ColdWeatherEvent: '-'
                      ReplReserveReqMw: 160
                      PeakImportMw: 3970
                      PeakLoadMw: 17330
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 19538
                      SurplusDeficiencyMw: 9597
                      DrrMw: 245
                      Day: 6
                      TotAvailGenMw: 25165
                      ColdWeatherOutagesMw: 0
                    - OtherGenOutagesMw: 2710
                      DelistMw: 971
                      MarketDate: '2026-08-02T00:00:00.000-04:00'
                      TotAvailGenImportMw: 28985
                      ColdWeatherWarn: '-'
                      PowerWatch: N
                      CsoMw: 26754
                      ColdWeatherWatch: '-'
                      Weather:
                        CityWeather:
                        - HighTempF: 81
                          DewPointF: 66
                          CityName: Boston
                        - HighTempF: 82
                          DewPointF: 67
                          CityName: Hartford
                      ColdWeatherEvent: '-'
                      ReplReserveReqMw: 160
                      PeakImportMw: 3970
                      PeakLoadMw: 18090
                      ReqdReserveMw: 2048
                      ReqdReserveInclReplMw: 2208
                      PowerWarn: N
                      TotLoadPlusReqdReserveMw: 20298
                      SurplusDeficiencyMw: 8687
                      DrrMw: 245
                      Day: 7
                      TotAvailGenMw: 25015
                      ColdWeatherOutagesMw: 0
                    BeginDate: '2026-07-28T00:00:00.000-04:00'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.sevendayforecast.current.html
        harvested: '2026-07-27'
      x-xml-element: SevenDayForecasts
      x-example-evidence:
        source: https://www.iso-ne.com/ws/wsclient (public ISO Express dashboard proxy, anonymous POST)
        observed: '2026-07-27'
        note: Real response payload observed anonymously through the public dashboard proxy; the proxy envelope and its _url key were removed.
  /sevendayforecast/day/{day}:
    get:
      operationId: getSevendayforecastDayByDay
      summary: Get most recent Day SDFs
      description: Get most recent Day SDFs.
      tags:
      - sevendayforecast
      responses:
        '200':
          description: a SevenDayForecastsElement containing the SDFs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
            application/json:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.sevendayforecast.day.day.html
        harvested: '2026-07-27'
      x-xml-element: SevenDayForecasts
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: Retrieve data for the day in(YYYYMMDD)
  /sevendayforecast/day/{day}/all:
    get:
      operationId: getSevendayforecastDayByDayAll
      summary: Get entire Day SDFs
      description: Get entire Day SDFs.
      tags:
      - sevendayforecast
      responses:
        '200':
          description: a SevenDayForecastsElement containing the SDFs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
            application/json:
              schema:
                $ref: '#/components/schemas/SevenDayForecasts'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.sevendayforecast.day.day.all.html
        harvested: '2026-07-27'
      x-xml-element: SevenDayForecasts
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: Retrieve data for the day in(YYYYMMDD)
  /sevendayforecast/info:
    get:
      operationId: getSevendayforecastInfo
      summary: Get the Service Info for SDF
      description: Get the Service Info for SDF.
      tags:
      - sevendayforecast
      responses:
        '200':
          description: the ServiceInfoElement for TTC.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
            application/json:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.sevendayforecast.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    SevenDayForecasts:
      type: object
      properties:
        SevenDayForecast:
          type: array
          items:
            $ref: '#/components/schemas/SevenDayForecast'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SevenDayForecasts
    SevenDayForecast:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        MarketDay:
          type: array
          items:
            $ref: '#/components/schemas/MarketDay'
        CreationDate:
          type: string
          format: date-time
      required:
      - BeginDate
      - CreationDate
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SevenDayForecast
    ServiceInfo:
      type: object
      properties:
        LatestBeginDate:
          type: string
          format: date-time
        CreationDate:
          type: string
          format: date-time
      required:
      - LatestBeginDate
      - CreationDate
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ServiceInfo
    CityWeather:
      type: object
      properties:
        CityName:
          type: string
        HighTempF:
          type: integer
        DewPointF:
          type: integer
      required:
      - CityName
      - HighTempF
      - DewPointF
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_CityWeather
    Weather:
      type: object
      properties:
        CityWeather:
          type: array
          items:
            $ref: '#/components/schemas/CityWeather'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Weather
    MarketDay:
      type: object
      properties:
        MarketDate:
          type: string
          format: date-time
        CsoMw:
          type: number
        ColdWeatherOutagesMw:
          type: number
        OtherGenOutagesMw:
          type: number
        DelistMw:
          type: number
        TotAvailGenMw:
          type: number
        PeakImportMw:
          type: number
        TotAvailGenImportMw:
          type: number
        PeakLoadMw:
          type: number
        ReplReserveReqMw:
          type: number
        ReqdReserveMw:
          type: number
        ReqdReserveInclReplMw:
          type: number
        TotLoadPlusReqdReserveMw:
          type: number
        DrrMw:
          type: number
        SurplusDeficiencyMw:
          type: number
        RtegMw:
          type: number
        PowerWatch:
          type: string
          enum:
          - Y
          - N
          - '-'
        PowerWarn:
          type: string
          enum:
          - Y
          - N
          - '-'
        ColdWeatherWatch:
          type: string
          enum:
          - Y
          - N
          - '-'
        ColdWeatherWarn:
          type: string
          enum:
          - Y
          - N
          - '-'
        ColdWeatherEvent:
          type: string
          enum:
          - Y
          - N
          - '-'
        EnergyEmergency:
          type: string
          enum:
          - Y
          - N
          - '-'
        Weather:
          $ref: '#/components/schemas/Weather'
        '@Day':
          type: integer
      required:
      - MarketDate
      - CsoMw
      - ColdWeatherOutagesMw
      - OtherGenOutagesMw
      - DelistMw
      - TotAvailGenMw
      - PeakImportMw
      - TotAvailGenImportMw
      - PeakLoadMw
      - ReplReserveReqMw
      - ReqdReserveMw
      - ReqdReserveInclReplMw
      - TotLoadPlusReqdReserveMw
      - DrrMw
      - SurplusDeficiencyMw
      - RtegMw
      - PowerWatch
      - PowerWarn
      - ColdWeatherWatch
      - ColdWeatherWarn
      - ColdWeatherEvent
      - EnergyEmergency
      - Weather
      - '@Day'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_MarketDay
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication over SSL. Credentials come from a free, self-serve ISO Express account; ISO New England states that ISO Express account holders are automatically granted access to the public data feeds. See https://www.iso-ne.com/participate/applications-status-changes/access-software-systems

ISO New England Sevendayforecast API

Operations 5

Documentation

Specifications

Schemas & Data

Other Resources