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OpenAPI Specification

openapi: 3.2.0
info:
  title: Grid Status Constraints API
  description: The Grid Status hosted API provides programmatic access to United States and Canadian electricity grid and power market data across CAISO, ERCOT, IESO, ISONE, MISO, NYISO, PJM, and SPP.
  version: 1.3.0
  contact:
    name: Grid Status
    url: https://www.gridstatus.io
    email: contact@gridstatus.io
servers:
- url: https://api.gridstatus.io/v1
  description: Grid Status hosted API
security:
- apiKeyHeader: []
- apiKeyQuery: []
tags:
- name: Constraints
  description: Transmission constraints, binding activity, and shift factors.
paths:
  /constraints:
    get:
      operationId: listConstraints
      tags:
      - Constraints
      summary: List constraints
      description: List transmission constraints.
      responses:
        '200':
          description: A list of constraints.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/contingencies:
    get:
      operationId: listContingencies
      tags:
      - Constraints
      summary: List contingencies
      description: List contingencies across constraints.
      responses:
        '200':
          description: A list of contingencies.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/binding:
    get:
      operationId: listConstraintBindingRows
      tags:
      - Constraints
      summary: List constraint binding rows
      description: List rows for intervals where constraints were binding.
      responses:
        '200':
          description: Constraint binding rows.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/binding/counts:
    get:
      operationId: listConstraintBindingCounts
      tags:
      - Constraints
      summary: List constraint binding counts by period
      description: Counts of binding intervals per constraint, grouped by period.
      responses:
        '200':
          description: Binding counts by period.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/binding/costs:
    get:
      operationId: listConstraintBindingCosts
      tags:
      - Constraints
      summary: List constraint binding costs by period
      description: Congestion costs attributed to binding constraints, grouped by period.
      responses:
        '200':
          description: Binding costs by period.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/binding/heat_map:
    get:
      operationId: getConstraintBindingHeatMap
      tags:
      - Constraints
      summary: Get constraint binding heat map
      description: Heat map of constraint binding activity.
      responses:
        '200':
          description: Constraint binding heat map cells.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/{gs_entity_id}:
    get:
      operationId: getConstraint
      tags:
      - Constraints
      summary: Get constraint
      description: Fetch a single constraint by Grid Status entity ID.
      parameters:
      - name: gs_entity_id
        in: path
        required: true
        description: Grid Status entity ID of the constraint.
        schema:
          type: string
      responses:
        '200':
          description: The constraint.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/{constraint_id}/shift-factors:
    get:
      operationId: listShiftFactors
      tags:
      - Constraints
      summary: List shift factors for a constraint
      description: Shift factors for a constraint across pricing locations.
      parameters:
      - $ref: '#/components/parameters/ConstraintId'
      responses:
        '200':
          description: Shift factors for the constraint.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/{constraint_id}/stats:
    get:
      operationId: listConstraintStats
      tags:
      - Constraints
      summary: List constraint stats by interval
      description: Statistics for a constraint by interval.
      parameters:
      - $ref: '#/components/parameters/ConstraintId'
      responses:
        '200':
          description: Constraint statistics by interval.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /constraints/locations/{location_gs_entity_id}/shift-factors:
    get:
      operationId: listShiftFactorsForLocation
      tags:
      - Constraints
      summary: List shift factors for a location
      description: Shift factors at a pricing location across constraints.
      parameters:
      - name: location_gs_entity_id
        in: path
        required: true
        description: Grid Status entity ID of the pricing location.
        schema:
          type: string
      responses:
        '200':
          description: Shift factors for the location.
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            type: object
            properties:
              detail:
                type: string
                example: Missing API Key.
  parameters:
    ConstraintId:
      name: constraint_id
      in: path
      required: true
      description: ID of the constraint.
      schema:
        type: string
  securitySchemes:
    apiKeyHeader:
      type: apiKey
      in: header
      name: x-api-key
      description: API key from https://www.gridstatus.io/settings/api.
    apiKeyQuery:
      type: apiKey
      in: query
      name: api_key
      description: API key passed as a query parameter (alternative to the header).