openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Fiveminuteexternalflow API
  version: '1.1'
  description: RESTful interface to ISO New England energy and market data. This OpenAPI document was DERIVED by API Evangelist from ISO New England's own published, machine-generated Enunciate technical documentation at https://webservices.iso-ne.com/docs/v1.1/ and the two XML Schemas it publishes (ns0.xsd, ns1.xsd, saved verbatim under schemas/). ISO New England does not publish an OpenAPI definition; the only provider-published machine-readable description of the interface is a WADL at https://webservices.iso-ne.com/api/v1.1?_wadl&_type=xml, which sits behind the same HTTP Basic authentication as the API and returned HTTP 401 to anonymous probes. Every path, method, parameter, description, media type and schema in this document is copied from the provider's published sources; nothing was invented. Each operation carries x-evidence naming the exact documentation page it came from. All feeds are available in XML and JSON, selected by adding a .xml or .json extension to the request URL or by sending an Accept header of application/xml or application/json.
  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: fiveminuteexternalflow
  description: 7 path template(s) under /fiveminuteexternalflow in the published ISO New England Web Services API v1.1 documentation.
paths:
  /fiveminuteexternalflow:
    get:
      operationId: getFiveminuteexternalflow
      summary: Default resource
      description: Default resource. Redirects to Five Minute External Flow Info.
      tags:
      - fiveminuteexternalflow
      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.fiveminuteexternalflow.html
        harvested: '2026-07-27'
  /fiveminuteexternalflow/current:
    get:
      operationId: getFiveminuteexternalflowCurrent
      summary: Get the current Five Minute ExternalFlows for all locations
      description: Get the current Five Minute ExternalFlows for all locations.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: a FiveMinuteExternalFlowElement containing the current Five Minute External Flow.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
        '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.fiveminuteexternalflow.current.html
        harvested: '2026-07-27'
      x-xml-element: ExternalFlows
  /fiveminuteexternalflow/current/location/{locationId}:
    get:
      operationId: getFiveminuteexternalflowCurrentLocationByLocationId
      summary: Get the current Five Minute External Flows for a given location
      description: Get the current Five Minute External Flows for a given location.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: a ExternalFlowElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ExternalFlow'
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalFlow'
        '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.fiveminuteexternalflow.current.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: ExternalFlow
      parameters:
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminuteexternalflow/current/locationType/{locationType}:
    get:
      operationId: getFiveminuteexternalflowCurrentLocationTypeByLocationType
      summary: Get the current Five Minute External Flow for a given location type
      description: Get the current Five Minute External Flow for a given location type.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: a ExternalFlowsElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
        '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.fiveminuteexternalflow.current.locationType.locationType.html
        harvested: '2026-07-27'
      x-xml-element: ExternalFlows
      parameters:
      - name: locationType
        in: path
        required: true
        schema:
          type: string
        description: The locationType
  /fiveminuteexternalflow/day/{day}:
    get:
      operationId: getFiveminuteexternalflowDayByDay
      summary: Get an entire day Five Minute External Flows for a given date
      description: Get an entire day Five Minute External Flows for a given date.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: a FiveMinuteExternalFlowsElement containing the Five Minute ExternalFlows.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
        '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.fiveminuteexternalflow.day.day.html
        harvested: '2026-07-27'
      x-xml-element: ExternalFlows
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
  /fiveminuteexternalflow/day/{day}/location/{locationId}:
    get:
      operationId: getFiveminuteexternalflowDayByDayLocationByLocationId
      summary: Get an entire days Five Minute External Flows for a given location
      description: Get an entire days Five Minute External Flows for a given location. Only the past [?] days are supported.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: a FiveMinuteExternalFlowsElement containing the Five Minute ExternalFlows.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
            application/json:
              schema:
                $ref: '#/components/schemas/ExternalFlows'
        '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.fiveminuteexternalflow.day.day.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: ExternalFlows
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminuteexternalflow/info:
    get:
      operationId: getFiveminuteexternalflowInfo
      summary: Get the Service Info for Five Minute External Flows
      description: Get the Service Info for Five Minute External Flows.
      tags:
      - fiveminuteexternalflow
      responses:
        '200':
          description: the ServiceInfoElement for Five Minute LMPs.
          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.fiveminuteexternalflow.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    ExternalFlows:
      type: object
      properties:
        ExternalFlow:
          type: array
          items:
            $ref: '#/components/schemas/ExternalFlow'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ExternalFlows
    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
    ExternalFlow:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        Location:
          $ref: '#/components/schemas/LocationRef'
        ActualFlow:
          type: number
        ImportLimit:
          type: number
        ExportLimit:
          type: number
        CurrentSchedule:
          type: number
        Purchase:
          type: number
        Sale:
          type: number
        TotalExports:
          type: number
        TotalImports:
          type: number
      required:
      - BeginDate
      - Location
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ExternalFlow
    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
  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