ISO New England

ISO New England Ncpc API

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

GitHub OpenAPI

Operations 5

GET /ncpc/{NCPCType} Get the Service Info for NCPC #
GET /ncpc/{NCPCType}/current Get the current NCPC #
GET /ncpc/{NCPCType}/day/{day} Get an entire days NCPCs #
GET /ncpc/{NCPCType}/info Get the Service Info for NCPC #
GET /ncpc/{NCPCType}/month/{month} Get an entire months NCPCs #

Documentation

📖
APIReference
https://webservices.iso-ne.com/docs/v1.1/
📖
Documentation
https://www.iso-ne.com/participate/support/web-services-data
📖
Documentation
https://www.iso-ne.com/participate/applications-status-changes/access-software-systems
📖
Documentation
https://www.iso-ne.com/static-assets/documents/2017/06/webservices_documentation.xlsx

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/openapi/iso-new-england-ncpc-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/json-schema/iso-new-england-web-services-schemas.json

Other Resources

🔗
SignUp
https://www.iso-ne.com/signup
🔗
Portal
https://www.iso-ne.com/isoexpress/
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/iso-new-england-web-services-ns0.xsd
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/iso-new-england-web-services-ns1.xsd
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/nextt-web-services.xsd
🔗
Examples
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/examples/_index.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/data-model/iso-new-england-data-model.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/errors/iso-new-england-problem-types.yml
🔗
WADL
https://webservices.iso-ne.com/api/v1.1?_wadl&_type=xml

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OpenAPI Specification

iso-new-england-ncpc-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Ncpc 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: ncpc
  description: 5 path template(s) under /ncpc in the published ISO New England Web Services API v1.1 documentation.
paths:
  /ncpc/{NCPCType}:
    get:
      operationId: getNcpcByNCPCType
      summary: Get the Service Info for NCPC
      description: Get the Service Info for NCPC.
      tags:
      - ncpc
      responses:
        '200':
          description: the ServiceInfoElement for NCPC.
          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.ncpc.NCPCType.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
      parameters:
      - name: NCPCType
        in: path
        required: true
        schema:
          type: string
  /ncpc/{NCPCType}/current:
    get:
      operationId: getNcpcByNCPCTypeCurrent
      summary: Get the current NCPC
      description: Get the current NCPC.
      tags:
      - ncpc
      responses:
        '200':
          description: a NCPCElement containing the current NCPC.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/NCPCs'
            application/json:
              schema:
                $ref: '#/components/schemas/NCPCs'
        '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.ncpc.NCPCType.current.html
        harvested: '2026-07-27'
      x-xml-element: NCPCs
      parameters:
      - name: NCPCType
        in: path
        required: true
        schema:
          type: string
  /ncpc/{NCPCType}/day/{day}:
    get:
      operationId: getNcpcByNCPCTypeDayByDay
      summary: Get an entire days NCPCs
      description: Get an entire days NCPCs. Not applicable for 'highvar' and 'var'.
      tags:
      - ncpc
      responses:
        '200':
          description: a NCPCsElement containing the NCPCs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/NCPCs'
            application/json:
              schema:
                $ref: '#/components/schemas/NCPCs'
        '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.ncpc.NCPCType.day.day.html
        harvested: '2026-07-27'
      x-xml-element: NCPCs
      parameters:
      - name: NCPCType
        in: path
        required: true
        schema:
          type: string
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
  /ncpc/{NCPCType}/info:
    get:
      operationId: getNcpcByNCPCTypeInfo
      summary: Get the Service Info for NCPC
      description: Get the Service Info for NCPC.
      tags:
      - ncpc
      responses:
        '200':
          description: the ServiceInfoElement for NCPC.
          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.ncpc.NCPCType.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
      parameters:
      - name: NCPCType
        in: path
        required: true
        schema:
          type: string
  /ncpc/{NCPCType}/month/{month}:
    get:
      operationId: getNcpcByNCPCTypeMonthByMonth
      summary: Get an entire months NCPCs
      description: Get an entire months NCPCs. Only the past 30 days
      tags:
      - ncpc
      responses:
        '200':
          description: a NCPCsElement containing the NCPCs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/NCPCs'
            application/json:
              schema:
                $ref: '#/components/schemas/NCPCs'
        '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.ncpc.NCPCType.month.month.html
        harvested: '2026-07-27'
      x-xml-element: NCPCs
      parameters:
      - name: NCPCType
        in: path
        required: true
        schema:
          type: string
      - name: month
        in: path
        required: true
        schema:
          type: string
        description: The month to retrieve data for (YYYYMM)
components:
  schemas:
    LocationRef:
      type: object
      properties:
        $:
          type: string
          description: Element text value (serialized as "$" in the JSON representation, per observed API responses).
        '@LocId':
          type: integer
        '@LocType':
          type: string
          enum:
          - NETWORK AREA
          - LOAD ZONE
          - NETWORK NODE
          - HUB
          - HUB NODE
          - RELIABILITY REGION
          - EXT. NODE
          - RESERVE ZONE
          - SYSTEM
          - INT. AREA
          - EXT. AREA
          - DISPATCH ZONE
          - CAPACITY ZONE
          - DRRAZ
          - DRR AGGREGATION ZONE
      required:
      - '@LocId'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_LocationRef
    NCPC:
      type: object
      properties:
        NCPCType:
          type: string
          enum:
          - GPA
          - VAR
          - HIGHVAR
          - EXTLOCECONOMIC
          - LSCPR
          - ECONOMIC
          - RRP
          - DLOC
        BeginDate:
          type: string
          format: date-time
        Location:
          $ref: '#/components/schemas/LocationRef'
        CreditType:
          type: string
        DaNcpcCharge:
          type: number
        RtNcpcCharge:
          type: number
        NcpcCharge:
          type: number
        ExternalNodeCharge:
          type: number
        RelRegnNetworkLoad:
          type: number
        VarNetworkLoad:
          type: number
        GpaRtlo:
          type: number
        RtNcpcDeviations:
          type: number
        DaNcpcLoadObligation:
          type: number
        RtNcpcLoadObligation:
          type: number
        DaNcpcChargeRate:
          type: number
        RtNcpcChargeRate:
          type: number
        NcpcChargeRate:
          type: number
        ExternalNodeChargeRate:
          type: number
        DaGenObligation:
          type: number
        DaLoadObligation:
          type: number
        RtRrpLoadObligation:
          type: number
        RtDlocLoadObligation:
          type: number
      required:
      - BeginDate
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_NCPC
    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
    NCPCs:
      type: object
      properties:
        NCPC:
          type: array
          items:
            $ref: '#/components/schemas/NCPC'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_NCPCs
  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