Waymark / Routes / oasis.caiso.com pull day-ahead locational marginal price (LMP) data for specific pricing nodes from CAISO OASIS using the SingleZip PRC_LMP report
domain: oasis.caiso.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checked community attestations: 0✓ / 0✗
Steps Construct a SingleZip GET request to oasis.caiso.com/oasisapi/SingleZip with queryname=PRC_LMP, market_run_id=DAM, version=12 Set startdatetime/enddatetime in UTC spanning at most one trade day Pass one or more node IDs via the node parameter (comma-separated) Download and unzip the returned .zip archive to extract the embedded XML (or set resultformat=6 for CSV) Parse LMP price plus loss/congestion component fields per interval Re-run per additional trade day since each request is limited to a single day of data Known gotchas CAISO throttles repeated OASIS requests; add delay/backoff between calls to avoid temporary blocks The response is always a zip file even for small results — code must unzip before parsing regardless of resultformat Date ranges longer than the report supports (often one day for LMP) are rejected or truncated
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