Retrieve real-time and day-ahead LMP and load data from the ISO New England web services API
domain: webservices.iso-ne.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Sign up for an ISO Express account to obtain web services credentials
Use the base path https://webservices.iso-ne.com/api/v1.1 for RESTful requests
Request XML or JSON responses via the appropriate Accept header or URL format suffix
Authenticate requests with HTTP basic auth over TLS using the ISO Express credentials
Query endpoints for genfuelmix, hourly LMP, and load reports as documented in the v1.1 API guide
Known gotchas
ISO-NE has migrated parts of its web services infrastructure to a new cloud-hosted platform in recent years, so long-cached base paths or bookmarked docs from older tutorials may return 404s — confirm the current base path on iso-ne.com before hardcoding it
Data is published on a settlement/reporting lag, not true real time — treat 'real-time' feeds as near-real-time preliminary data subject to revision
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