About the data
Real-time prices from each ISO’s real-time LMP files, including ERCOT 15-minute settlement point prices and 5-minute SCED prices. A collector adds new five-minute hub intervals every five minutes and every node every hour, and revisits recent days until final prices replace preliminary ones.
Where an ISO publishes sub-hourly prices, the hour is the mean of its intervals and needs every interval. Hub prices and basis live with these prices, as they do for day-ahead.
Free accounts see every price and basis with each node under an alias. Node names are part of Pro.
- Served
- By market; see the table
- Grain
- Five-minute hubs and every node, with hourly means
- Updates
- Every 5 minutes for hubs; every hour for all nodes
- Every node
- CAISO from January 2016, NYISO from February 2005, MISO from December 2022, ERCOT from December 2023, ISO-NE from June 2024, SPP from January 2025 and PJM from December 2025
- Map periods
- January 2025 to August 2026 by week, month and year
- Licence
- Public market data under each ISO’s terms of use
Coverage by market
| Market | First year served |
|---|---|
| CAISO | 2016 |
| ERCOT | 2014 |
| ISO-NE | 2017 |
| MISO | 2005 |
| NYISO | 1999 |
| PJM | 1998 |
| SPP | 2014 |
The newest day in each market, checked every hour, is on Coverage.
Access
Free with an InfraMap account. Create a free account.
Where it appears: Prices layer, Prices tab, CSV exports, agent, MCP.
MCP tools that return it: get_live_prices, get_project_market_prices, analyze_market_period, get_ercot_project_data, rank_pricing_nodes. The MCP server is part of Pro; setup is on MCP server.
Sources
- OASIS(opens in a new tab), CAISO
- Settlement point prices(opens in a new tab), ERCOT
- ISO Express(opens in a new tab), ISO-NE
- Market reports(opens in a new tab), MISO
- Market data(opens in a new tab), NYISO
- Data Miner 2(opens in a new tab), PJM
- SPP portal(opens in a new tab), SPP
Periods and update notes for each source are on Data sources.
Known gaps
- PJM before 2023 covers hubs, zones and aggregates only.
- CAISO has no source files for part of April 2025. NYISO look-ahead intervals are not kept.
- Known gaps stay blank, for example some NYISO real-time days in July 2026 and some SPP five-minute files.
- MISO real-time prices are preliminary until final.
Missing values stay missing: a null means the source has no usable record, never zero. Zero and negative values are shown as reported.
How InfraMap uses it
How InfraMap joins, groups and calculates with this dataset is on Methodology.
Questions it answers
- What are the newest five-minute real-time prices at every ERCOT hub?
- Which CAISO nodes had the most negative real-time price hours in spring 2025?
- How did real-time basis at a West Texas wind project move month by month in 2025?
Terms: Locational marginal price (LMP), Day-ahead and real-time markets, Basis, Negative prices.