specification: API Commons Plans
specificationVersion: '0.1'
provider: MISO
providerId: miso
generated: '2026-07-27'
method: searched
created: '2026-07-27'
modified: '2026-07-27'
tags:
  - Plans
  - Open Data
  - Energy
description: >-
  MISO charges nothing for API access. There is no paid tier, no metered billing and no
  commercial agreement anywhere in its public data programme. What MISO has instead is
  three access postures: fully anonymous (the Public API and the market report archive),
  free but keyed and self-serve (the two MISO Data Exchange products), and closed
  registration (MUI 2.0, gated on a client digital certificate issued to a registered
  market participant). The two Data Exchange products below are real Azure API Management
  products read from MISO's own anonymously served portal product metadata on 2026-07-27;
  both return approvalRequired false, which is what makes them genuinely self-serve.
sources:
  - https://data-exchange.misoenergy.org/products
  - https://data-exchange.misoenergy.org/developer/products?api-version=2022-04-01-preview
  - https://help.misoenergy.org/knowledgebase/article/KA-01489/en-us
currency: USD
plans:
  - name: Public API
    id: public-api
    type: free
    price: 0
    access: anonymous
    subscription_required: false
    approval_required: false
    apis:
      - miso:miso-public-api-operations-displays
      - miso:miso-public-api-markets-displays
    limits:
      - Politeness guidance only — no more than one call per minute (not enforced)
    notes: >-
      Thirty-seven JSON endpoints served to an anonymous GET with no key, no account and
      no click-through. Verified anonymous 2026-07-27.
  - name: Market Reports archive
    id: market-reports
    type: free
    price: 0
    access: anonymous
    subscription_required: false
    approval_required: false
    apis:
      - miso:miso-market-reports
    notes: >-
      Bulk CSV / XLSX / XML / ZIP / PDF market reports over plain HTTP GET at
      docs.misoenergy.org/marketreports/ with no key and no login.
  - name: Pricing API
    id: pricing-api
    type: free
    price: 0
    access: keyed
    subscription_required: true
    approval_required: false
    subscriptions_limit: null
    apis:
      - miso:miso-data-exchange-pricing-api
    limits:
      - 100 calls per minute per subscription
      - 24,000 calls per day per subscription
    signup: https://data-exchange.misoenergy.org/
    description: >-
      "This service provides access to the Energy and Ancillary Service prices in the
      Day-Ahead and Real-Time markets. Prices are published for both Ex-Ante and Ex-Post."
  - name: Load, Generation, and Interchange API
    id: load-generation-and-interchange-api
    type: free
    price: 0
    access: keyed
    subscription_required: true
    approval_required: false
    subscriptions_limit: null
    apis:
      - miso:miso-data-exchange-load-generation-interchange-api
    limits:
      - 100 calls per minute per subscription
      - 24,000 calls per day per subscription
    signup: https://data-exchange.misoenergy.org/
    description: >-
      "Load, Generation, and Interchange API" — demand, load and load forecast; generation
      cleared and offered; and energy transfers crossing Balancing Authority boundaries.
  - name: MUI 2.0 (market participants)
    id: mui-2-0
    type: restricted
    price: 0
    access: client-certificate
    subscription_required: true
    approval_required: true
    apis:
      - miso:miso-mui-2-0-api
    notes: >-
      Not a commercial plan. Access requires MISO market-participant registration and a
      client digital certificate issued through the MISO Market Portal.
onboarding:
  account: A MISO public-website profile is required before a Data Exchange account can be created.
  key_lifecycle: >-
    "The API keys do not expire or require revalidation, but the accounts they are tied to
    have account password that expire and require reset after 1 year."
  terms: >-
    Each Data Exchange product carries MISO's AS IS / AS AVAILABLE warranty disclaimer as
    its product terms; accepted at subscription time.