New York Independent System Operator (NYISO)
The New York Independent System Operator (NYISO) is the not-for-profit FERC-jurisdictional entity that operates New York State's bulk electricity grid, administers the state's wholesale energy, capacity and ancillary-services markets, and performs long-term power system planning. Formed in 1999 out of the New York Power Pool, it sits squarely in the wholesale middle of the value chain - between generators, transmission owners and interconnectors on one side and the investor-owned utilities and retail suppliers who actually bill New York consumers on the other. NYISO's API posture is the sector's classic two-speed split, and NYISO lands hard on both ends of it. Market and system data is genuinely open - the MIS public archive at mis.nyiso.com/public serves roughly sixty machine-readable report families (day-ahead and real-time LBMP, actual and forecast load, real-time fuel mix, ATC/TTC, outages, constraints, interface flows, bid data, capacity, uplift, emissions) as daily CSV and monthly ZIP with no account, no key and no referrer check, and the FERC-mandated OASIS node publishes an anonymously listable object store of transmission postings. Consumer data is the exact opposite - there is none, and none is expected, because NYISO holds no retail customer relationships. Every real REST API NYISO documents - the Finance APIs (Metering, Settlements, Invoicing) and the Metering API under api.nyiso.com - is market-participant-only, gated behind an MIS user account plus a NAESB-accredited digital certificate, and every one of those endpoints answers 401 anonymously. The United States has no consumer energy data mandate behind Green Button, and in any case Green Button binds distribution utilities, not system operators, so NYISO carries no Green Button or Consumer Data Right obligation at all.
New York Independent System Operator (NYISO) is tracked in the API Evangelist network. This page is the human-readable profile that sits on top of the machine-readable index we maintain at apis.io.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
New York Independent System Operator (NYISO) is in the network as a tracked entity. We haven't yet indexed a public API surface for it — when one is published, the artifacts, score, and agent-readiness read will appear here automatically. The source repository is where that profile is built.
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