pull real-time hourly locational marginal prices for PJM pricing nodes via the PJM Data Miner 2 rt_hrl_lmps feed
domain: dataminer2.pjm.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Create a pjm.com account and generate a Data Miner 2 subscription key
Call the rt_hrl_lmps feed at dataminer2.pjm.com/feed/rt_hrl_lmps with rowCount/startRow (or datetime_beginning_utc filters) plus the subscription key header
Filter by pnode_id or zone to scope to specific nodes
Parse fields including datetime_beginning_utc, total_lmp_rt, congestion_price_rt, and marginal_loss_price_rt
Paginate using the returned row-count metadata until all rows for the requested window are retrieved
Respect the non-member rate limit (6 connections/minute) unless authenticated as a PJM member (600/minute)
Known gotchas
Non-member accounts are capped at 6 data connections per minute vs 600 for PJM members — exceeding this returns throttling errors
rt_hrl_lmps is posted with a short delay after real time; do not treat it as a truly live/streaming feed
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