New York Independent System Operator (NYISO)

NYISO Finance Settlements API

The Settlements component of NYISO's Finance APIs. The published guide documents GET /v1/stationPower, retrieving station power settlement data by billing month with an optional version parameter, as JSON over HTTPS 1.1 with TLS 1.2. Restricted to NYISO market participants under the same two-factor scheme as the rest of the Finance APIs - MIS user account and password via HTTP Basic plus the associated NAESB certificate on every request. The root and the stationPower endpoint both returned 401 Authorization Required to anonymous probes on 2026-07-27.

GitHub

Documentation

📖
Documentation
https://www.nyiso.com/documents/20142/45334160/NYISO%20Finance%20APIs%20User's%20Guide%20v1.2%20-%20DRAFT.pdf/4f0de58a-783d-a317-64fe-caed77ba61fa
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Documentation
https://www.nyiso.com/billings-and-settlements
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APIReference
https://www.nyiso.com/documents/20142/45334160/NYISO%20Finance%20APIs%20User's%20Guide%20v1.2%20-%20DRAFT.pdf/4f0de58a-783d-a317-64fe-caed77ba61fa

Other Resources

🔗
Sandbox
https://raw.githubusercontent.com/api-evangelist/nyiso/refs/heads/main/sandbox/nyiso-sandbox.yml

API entry from apis.yml

apis.yml Raw ↑ 
aid: nyiso:nyiso-finance-settlements-api
name: NYISO Finance Settlements API
description: The Settlements component of NYISO's Finance APIs. The published guide documents GET /v1/stationPower,
  retrieving station power settlement data by billing month with an optional version parameter, as JSON
  over HTTPS 1.1 with TLS 1.2. Restricted to NYISO market participants under the same two-factor scheme
  as the rest of the Finance APIs - MIS user account and password via HTTP Basic plus the associated NAESB
  certificate on every request. The root and the stationPower endpoint both returned 401 Authorization
  Required to anonymous probes on 2026-07-27.
humanURL: https://www.nyiso.com/documents/20142/45334160/NYISO%20Finance%20APIs%20User's%20Guide%20v1.2%20-%20DRAFT.pdf/4f0de58a-783d-a317-64fe-caed77ba61fa
baseURL: https://api.nyiso.com/finance/settlements
tags:
- Settlements
- Electricity
- Market Participants
properties:
- type: Documentation
  url: https://www.nyiso.com/documents/20142/45334160/NYISO%20Finance%20APIs%20User's%20Guide%20v1.2%20-%20DRAFT.pdf/4f0de58a-783d-a317-64fe-caed77ba61fa
- type: Documentation
  url: https://www.nyiso.com/billings-and-settlements
- type: APIReference
  name: Finance APIs User's Guide v1.2 (Settlements - GET /v1/stationPower)
  url: https://www.nyiso.com/documents/20142/45334160/NYISO%20Finance%20APIs%20User's%20Guide%20v1.2%20-%20DRAFT.pdf/4f0de58a-783d-a317-64fe-caed77ba61fa
- type: Sandbox
  name: API Market Trial environment (apitest.nyiso.com)
  url: sandbox/nyiso-sandbox.yml