# NYISO Metering API

**Canonical:** https://apis.io/apis/nyiso/nyiso-metering-api/  
**Provider:** New York Independent System Operator (NYISO) — https://apis.io/providers/nyiso/  
**Base URL:** https://api.nyiso.com/metering  
**Documentation:** https://www.nyiso.com/documents/20142/27889215/NYISO%20Metering%20API%20User%20Guide.pdf/d8ed36d3-1a40-9584-6961-3fdb845ca4fa

NYISO Metering API is one of 6 APIs that [New York Independent System Operator (NYISO)](https://apis.io/providers/nyiso/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Metering, Electricity, and Market Participants. The published artifact set on APIs.io includes API documentation and an API reference.

NYISO's standalone Metering API, documented separately from the Finance APIs guide and served from its own root at api.nyiso.com/metering. It covers submission and retrieval of hourly revenue-grade meter data for generators, ties and subzones via POST and GET /v1/powerMetering, and retrieval of calculated subzone load via GET /v1/calculatedSubzoneLoad/summary and /v1/calculatedSubzoneLoad/detail. JSON bodies, ISO-8601 dates and times, HTTPS 1.1 over TLS 1.2, and a rolling three-year-and-ten-month data availability window ending with the current month. Two-factor authentication is required - MIS user account and password via HTTP Basic plus the NAESB certificate associated with that account on every request. The root and /v1/powerMetering both returned 401 Authorization Required to anonymous probes on 2026-07-27.

## Machine-readable artifacts (5)

- **Documentation** — https://www.nyiso.com/documents/20142/27889215/NYISO%20Metering%20API%20User%20Guide.pdf/d8ed36d3-1a40-9584-6961-3fdb845ca4fa
- **Documentation** — https://www.nyiso.com/documents/20142/3625950/mpug.pdf
- **Documentation** — https://www.nyiso.com/documents/20142/3625950/SDA_UG.pdf
- **APIReference** — https://www.nyiso.com/documents/20142/27889215/NYISO%20Metering%20API%20User%20Guide.pdf/d8ed36d3-1a40-9584-6961-3fdb845ca4fa
- **AgentSkill** — https://raw.githubusercontent.com/api-evangelist/nyiso/refs/heads/main/skills/nyiso-submit-meter-data.md

## Other New York Independent System Operator (NYISO) APIs (5)

- [NYISO MIS Public Data Archive](https://apis.io/apis/nyiso/nyiso-mis-public-data/)
- [NYISO OASIS Postings](https://apis.io/apis/nyiso/nyiso-oasis-postings/)
- [NYISO Finance Metering API](https://apis.io/apis/nyiso/nyiso-finance-metering-api/)
- [NYISO Finance Settlements API](https://apis.io/apis/nyiso/nyiso-finance-settlements-api/)
- [NYISO Finance Invoicing API](https://apis.io/apis/nyiso/nyiso-finance-invoicing-api/)

## Tags

Metering, Electricity, Market Participants

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/nyiso/nyiso-metering-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/nyiso/.