MISO Aggregated Pnode API

openapi: 3.2.0
info:
  title: Pricing Aggregated Pnode API
  description: 'The target data for the Ancillary Services are the Market Clearing Price (MCP) related to the 5 products in this market: Regulation, Spin, Supplemental, Short-term-reserves (STR), and Ramp (up and down). Ancillary Market prices are published at the Reserve Zone level and there are 8 zones in the current Ancillary Services Market.'
  version: '1.0'
  x-provenance:
    harvestedBy: API Evangelist
    fetchDate: '2026-07-27'
    note: Assembled verbatim from MISO's own anonymously served Azure API Management developer-portal data API. MISO's OpenAPI export endpoint returns a valid document whose paths object is EMPTY, so info, servers and components.securitySchemes were taken from that export, while paths, methods, operationIds, summaries, descriptions, parameters, response codes and response examples were taken from the portal operations endpoints, and components.schemas from the portal schemas endpoint. Nothing was invented, inferred or paraphrased.
    sources:
    - https://data-exchange.misoenergy.org/developer/apis/pricing-api?export=true&format=openapi%2Bjson&api-version=2022-04-01-preview (HTTP 200)
    - https://data-exchange.misoenergy.org/developer/apis/pricing-api/operations?api-version=2022-04-01-preview (HTTP 200)
    - https://data-exchange.misoenergy.org/developer/apis/pricing-api/operations/{operationId}?api-version=2022-04-01-preview (HTTP 200, all operations)
    - https://data-exchange.misoenergy.org/developer/apis/pricing-api/schemas/6a63cd40fc41c6126471c3cd?api-version=2022-04-01-preview (HTTP 200)
    gatewayVerification: Anonymous GET to the gateway returns HTTP 401 "Access denied due to missing subscription key"; unknown routes return HTTP 404 "Resource not found" (verified 2026-07-27).
servers:
- url: https://apim.misoenergy.org/pricing
security:
- {}
- apiKeyHeader: []
- apiKeyQuery: []
tags:
- name: Aggregated Pnode
paths:
  /v1/aggregated-pnode:
    get:
      operationId: get-v1-aggregated-pnode
      summary: Aggregated Pnode
      description: List of Aggregated Pnode with their types.
      parameters:
      - name: date
        in: query
        required: false
        description: Filter by date. Defaults to current date if not specified.
        schema:
          type: string
          format: date
      - name: node
        in: query
        required: false
        description: Filter to a specific Pricing Node.
        schema:
          type: string
      - name: pageNumber
        in: query
        required: false
        schema:
          type: integer
          format: int32
          default: 1
      responses:
        '200':
          description: Successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/200-OK-Aggregated-NodeResponse-json'
              example:
                data:
                - node: ALTW.WELLS1
                  nodeType: Hubs
                page:
                  pageNumber: 0
                  pageSize: 0
                  totalElements: 0
                  totalPages: 0
                  lastPage: true
        '400':
          description: Invalid date format
          content:
            application/json: {}
        '401':
          description: Invalid or missing Bearer Token in the Authorization header
          content:
            application/json: {}
        '404':
          description: Date not found
          content:
            application/json: {}
      tags:
      - Aggregated Pnode
components:
  schemas:
    200-OK-Aggregated-NodeResponse-json:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/AggregatedPnode'
        page:
          $ref: '#/components/schemas/PageInfo'
      x-apim-inline: true
    AggregatedPnode:
      type: object
      properties:
        node:
          type: string
          description: Pricing Node
          example: ALTW.WELLS1
        nodeType:
          type: string
          description: Pricing Node Type
          example: Hubs
    PageInfo:
      type: object
      properties:
        pageNumber:
          type: integer
          format: int32
        pageSize:
          type: integer
          format: int32
        totalElements:
          type: integer
          format: int64
        totalPages:
          type: integer
          format: int64
        lastPage:
          type: boolean
  securitySchemes:
    apiKeyHeader:
      type: apiKey
      name: Ocp-Apim-Subscription-Key
      in: header
    apiKeyQuery:
      type: apiKey
      name: subscription-key
      in: query