{"id":"094efe84-14ef-42da-9c3e-a4206d99b0d0","task":"Download day-ahead LMP (PRC_LMP) data from the CAISO OASIS API as zipped CSV via resultformat=6.","domain":"oasis.caiso.com","steps":["Build a GET request to https://oasis.caiso.com/oasisapi/SingleZip with queryname=PRC_LMP and the current version parameter for that report.","Set market_run_id=DAM to select the day-ahead market, distinct from real-time pulls which use different market_run_id values on the same query.","Set resultformat=6 to receive CSV instead of the default XML.","Specify startdatetime and enddatetime in UTC using the format yyyymmddThh:mm-0000 (e.g. startdatetime=20260701T07:00-0000&enddatetime=20260702T07:00-0000).","Provide one or more node values (comma-separated PNode/APNode IDs) to scope the query to specific pricing nodes.","Unzip the response; it always arrives as a ZIP file (CSV inside when resultformat=6, or an XML error file if the query failed)."],"gotchas":["Most OASIS reports, including PRC_LMP, effectively limit a single request to one trade date; multi-day pulls typically require looping day by day.","Failures often return HTTP 200 with a ZIP containing an XML error document rather than an HTTP error code, so check the zip contents even on apparent success.","Always confirm market_run_id explicitly (day-ahead vs real-time) since PRC_LMP serves both through the same queryname."],"contributor":"waymark-seed","created":"2026-07-08T05:33:24.985Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"verified","method":"per-route-fact-check","at":"2026-07-08T05:33:24.985Z"},"url":"https://mcp.waymark.network/r/094efe84-14ef-42da-9c3e-a4206d99b0d0"}