# MISO **Canonical:** https://apis.io/providers/miso/ **Website:** https://www.misoenergy.org/ **APIs profiled:** 38 MISO — the Midcontinent Independent System Operator — is the not-for-profit Regional Transmission Organization that operates the electric grid and the wholesale electricity markets across fifteen US states and the Canadian province of Manitoba, serving a footprint of roughly forty-five million people from headquarters in Carmel, Indiana. Formed in 1998 and operating the region since December 2001, it is regulated by the Federal Energy Regulatory Commission, dispatches generation in real time, clears day-ahead and real-time energy and ancillary services markets, runs the ARR/FTR market and the generator interconnection queue, and plans the transmission system. It sits squarely in the middle of the value chain: it owns no generation, no wires and no retail customers, but it holds the market-wide operational data that every generator, transmission owner, load-serving entity and trader in the Midwest and the South depends on. Its API posture is the classic system operator split, and it is an unusually clean example of it. On the market side MISO is genuinely open — thirty-seven JSON endpoints at public-api.misoenergy.org return real-time fuel mix, load, prices, binding constraints and interchange to an anonymous GET with no key, no account and no click-through, and the full market report archive at docs.misoenergy.org downloads anonymously as CSV and XLSX. On the consumer side there is nothing to open: MISO is not a retail utility, holds no customer usage or billing data, and no energy-data mandate of any kind applies to it. Green Button is voluntary in the United States and is a distribution-utility standard; MISO publishes no Green Button, ESPI, or consumer data-sharing surface, and makes no claim to. Its newer MISO Data Exchange developer portal adds a keyed but self-serve tier over historical market report data, and its MUI 2.0 market interface is a genuinely closed, client-certificate-gated API for registered market participants only. ## Kin Score — 53.6 / 100 (developing) Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 53.6). | Facet | Score | |---|---| | Discoverability | 66.7 | | Contract Quality | 31.6 | | Governance | 16.7 | | Contract Governance | 16.7 | | Operational Transparency | 52.6 | | Developer Ergonomics | 66.1 | | Commercial Clarity | 65.8 | | Access Clarity | 65.8 | Regulatory layer — **Energy & Utilities**: 44.6 (matched via tags). ## Agent readiness — 42.9 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | no | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | verified | | Rate Limit Signal | documented | | Event Surface Described | no | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## APIs (38) - **MISO Market Reports** — MISO's long-running bulk market report surface — the second fully anonymous layer of its open market data, and the archive the Data Exchange APIs sit on top of. Every published ... - **MISO File Download API** — The bulk file-retrieval counterpart to MUI 2.0, on the same two client-certificate-gated hosts and documented only in a PDF. MISO's File Download Specification lays out a consis... - **MISO FTR MPMA Market User API** — The Financial Transmission Rights / Multi-Period Multi-Auction market user API — four SOAP services covering the FTR market itself, auctions, bulk download and the secondary mar... - **MISO EDR Service (Electronic Data Reporting)** — A SOAP service for uploading meter data and offer data to MISO, with a published WSDL and six XSD schemas (MdUploadPayload, MdUploadResponse, MeterData, OfferData, OfferDataUplo... - **MISO CROW API (Outage Scheduling)** — The outage-scheduling interface, built on the CROW product, documented in a PDF reference plus a MISO-specific addendum and shipped with worked XML request and response examples... - **MISO Fuel and Consumables Data Request API** — Data request API for fuel and consumables information, documented in a 171KB PDF API guide on MISO's CDN and nowhere else. - **MISO Market Portal Meter Data and Settlement Statements API** — Market Portal API for retrieving meter data and settlement statements, documented in a 1MB PDF on MISO's CDN. Sits alongside the File Download API in the settlements area of the... - **MISO Ace API** — The Ace API from MISO — 1 operation(s) for ace. - **MISO Admin API** — The Admin API from MISO — 6 operation(s) for admin. - **MISO Aggregated Pnode API** — The Aggregated Pnode API from MISO — 1 operation(s) for aggregated pnode. - **MISO Bidding API** — The Bidding API from MISO — 2 operation(s) for bidding. - **MISO Binding Constraints API** — The BindingConstraints API from MISO — 3 operation(s) for bindingconstraints. - **MISO Contracts API** — The Contracts API from MISO — 4 operation(s) for contracts. - **MISO Coordinated Transaction Scheduling API** — The CoordinatedTransactionScheduling API from MISO — 1 operation(s) for coordinatedtransactionscheduling. - **MISO Csat Next Day Short Term Reserve Requirement API** — The CsatNextDayShortTermReserveRequirement API from MISO — 1 operation(s) for csatnextdayshorttermreserverequirement. - **MISO Csat Supply Demand API** — The CsatSupplyDemand API from MISO — 1 operation(s) for csatsupplydemand. - **MISO Day Ahead API** — The Day Ahead API from MISO — 11 operation(s) for day ahead. - **MISO Forecast API** — The Forecast API from MISO — 6 operation(s) for forecast. - **MISO Fuel Mix API** — The FuelMix API from MISO — 3 operation(s) for fuelmix. - **MISO Generation Outages API** — The GenerationOutages API from MISO — 1 operation(s) for generationoutages. - **MISO Historical API** — The Historical API from MISO — 1 operation(s) for historical. - **MISO IMM API** — The IMM API from MISO — 1 operation(s) for imm. - **MISO Interchange API** — The Interchange API from MISO — 9 operation(s) for interchange. - **MISO Market Pricing API** — The MarketPricing API from MISO — 6 operation(s) for marketpricing. - **MISO Model API** — The Model API from MISO — 1 operation(s) for model. - **MISO Notifications API** — The Notifications API from MISO — 6 operation(s) for notifications. - **MISO Notifications Format API** — The Notifications Format API from MISO — 7 operation(s) for notifications format. - **MISO Offer API** — The Offer API from MISO — 7 operation(s) for offer. - **MISO Real Time API** — The Real Time API from MISO — 17 operation(s) for real time. - **MISO Real Time RSG Commitments API** — The RealTimeRSGCommitments API from MISO — 1 operation(s) for realtimersgcommitments. - **MISO Real Time Total Load API** — The RealTimeTotalLoad API from MISO — 1 operation(s) for realtimetotalload. - **MISO Regional Directional Transfer API** — The RegionalDirectionalTransfer API from MISO — 1 operation(s) for regionaldirectionaltransfer. - **MISO Reports API** — The Reports API from MISO — 14 operation(s) for reports. - **MISO Reserves API** — The Reserves API from MISO — 6 operation(s) for reserves. - **MISO Snapshot API** — The Snapshot API from MISO — 1 operation(s) for snapshot. - **MISO Transactions API** — The Transactions API from MISO — 5 operation(s) for transactions. - **MISO Weather API** — The Weather API from MISO — 1 operation(s) for weather. - **MISO Wind Solar API** — The WindSolar API from MISO — 7 operation(s) for windsolar. ## MCP servers (1) - **MISO MCP Server** ## Agentic access (1) - **Miso Agentic Access** — 69 operations ## Security (2) - **Miso Authentication** — none/apiKey/mutualTLS · 2 schemes - **Miso Domain Security** — TLSv1.3 · HSTS · DMARC ## Plans (1) - **Miso Plans** ## Tags Energy, United States, Electricity, Energy Markets, Grid, System Operator, Market Operator, Wholesale Power, Open Energy Data, Renewables, Solar, Demand Response, Utilities --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/miso/). Scores are computed from the provider's own public artifacts under a published rubric.