What is the gridstatus library?

The gridstatus open-source library is a Python library maintained by Grid Status that provides a consistent API for accessing raw electricity supply, demand, and pricing data for the major Independent System Operators (ISOs) in the United States and Canada. It currently supports data from CAISO, SPP, ISONE, MISO, ERCOT, NYISO, PJM, IESO, AESO, and the EIA.

GridStatus.io and Hosted API

This library provides minimally-processed data. If you need production-ready data, consider using our hosted API or visit GridStatus.io to see the data in a web interface.

If you are trying to use our hosted API, you might want to check out the gridstatusio library.

5 Minute Overview

First, we can see all of the ISOs that are supported

import gridstatus
gridstatus.list_isos()

	Name	Id	Class
0	Midcontinent ISO	miso	MISO
1	California ISO	caiso	CAISO
2	PJM	pjm	PJM
3	Electric Reliability Council of Texas	ercot	Ercot
4	Southwest Power Pool	spp	SPP
5	New York ISO	nyiso	NYISO
6	ISO New England	isone	ISONE
7	Independent Electricity System Operator	ieso	IESO

Next, we can select an ISO we want to use

caiso = gridstatus.CAISO()

Fuel Mix

ISOs share a common API with methods like get_fuel_mix and get_load. Here is how we can get the fuel mix

caiso.get_fuel_mix("today")

2026-07-27 00:12:47 - INFO - Fetching URL: https://www.caiso.com/outlook/current/fuelsource.csv?_=1785111167

	Time	Interval Start	Interval End	Solar	Wind	Geothermal	Biomass	Biogas	Small Hydro	Coal	Nuclear	Natural Gas	Large Hydro	Batteries	Imports	Other
0	2026-07-26 00:00:00-07:00	2026-07-26 00:00:00-07:00	2026-07-26 00:05:00-07:00	-68	5014	719	238	161	298	0	2279	13041	2825	1765	3267	0
1	2026-07-26 00:05:00-07:00	2026-07-26 00:05:00-07:00	2026-07-26 00:10:00-07:00	-66	5013	724	240	163	297	0	2279	12975	2770	2129	3220	0
2	2026-07-26 00:10:00-07:00	2026-07-26 00:10:00-07:00	2026-07-26 00:15:00-07:00	-66	5017	733	240	162	294	0	2280	13006	2788	2312	2980	0
3	2026-07-26 00:15:00-07:00	2026-07-26 00:15:00-07:00	2026-07-26 00:20:00-07:00	-65	4987	733	240	162	295	0	2279	13061	2764	2140	3036	0
4	2026-07-26 00:20:00-07:00	2026-07-26 00:20:00-07:00	2026-07-26 00:25:00-07:00	-65	4936	732	245	162	293	0	2279	13121	2768	1882	3159	0
...	...	...	...	...	...	...	...	...	...	...	...	...	...	...	...	...
201	2026-07-26 16:45:00-07:00	2026-07-26 16:45:00-07:00	2026-07-26 16:50:00-07:00	14659	2988	779	241	165	298	0	2279	11478	2483	1305	-3256	0
202	2026-07-26 16:50:00-07:00	2026-07-26 16:50:00-07:00	2026-07-26 16:55:00-07:00	14610	2978	773	241	165	298	0	2279	11639	2548	1681	-3564	0
203	2026-07-26 16:55:00-07:00	2026-07-26 16:55:00-07:00	2026-07-26 17:00:00-07:00	15012	2970	756	240	164	297	0	2279	11736	2532	1867	-3849	0
204	2026-07-26 17:00:00-07:00	2026-07-26 17:00:00-07:00	2026-07-26 17:05:00-07:00	15069	2991	757	240	164	294	0	2279	11552	2614	2051	-3884	0
205	2026-07-26 17:05:00-07:00	2026-07-26 17:05:00-07:00	2026-07-26 17:10:00-07:00	14833	3010	756	242	165	296	0	2279	11302	2915	1398	-3085	0

206 rows × 16 columns

Load

or the energy demand throughout the current day as a Pandas DataFrame

caiso.get_load("today")

2026-07-27 00:12:48 - INFO - Fetching URL: https://www.caiso.com/outlook/current/demand.csv?_=1785111168

	Time	Interval Start	Interval End	Load
0	2026-07-26 00:00:00-07:00	2026-07-26 00:00:00-07:00	2026-07-26 00:05:00-07:00	29634.0
1	2026-07-26 00:05:00-07:00	2026-07-26 00:05:00-07:00	2026-07-26 00:10:00-07:00	29811.0
2	2026-07-26 00:10:00-07:00	2026-07-26 00:10:00-07:00	2026-07-26 00:15:00-07:00	29845.0
3	2026-07-26 00:15:00-07:00	2026-07-26 00:15:00-07:00	2026-07-26 00:20:00-07:00	29704.0
4	2026-07-26 00:20:00-07:00	2026-07-26 00:20:00-07:00	2026-07-26 00:25:00-07:00	29600.0
...	...	...	...	...
201	2026-07-26 16:45:00-07:00	2026-07-26 16:45:00-07:00	2026-07-26 16:50:00-07:00	32972.0
202	2026-07-26 16:50:00-07:00	2026-07-26 16:50:00-07:00	2026-07-26 16:55:00-07:00	33254.0
203	2026-07-26 16:55:00-07:00	2026-07-26 16:55:00-07:00	2026-07-26 17:00:00-07:00	33637.0
204	2026-07-26 17:00:00-07:00	2026-07-26 17:00:00-07:00	2026-07-26 17:05:00-07:00	33781.0
205	2026-07-26 17:05:00-07:00	2026-07-26 17:05:00-07:00	2026-07-26 17:10:00-07:00	33893.0

206 rows × 4 columns

Load Forecast

Another dataset we can query is the load forecast

nyiso = gridstatus.NYISO()
nyiso.get_load_forecast("today")

2026-07-27 00:12:48 - INFO - Requesting http://mis.nyiso.com/public/csv/isolf/20260726isolf.csv

/home/docs/checkouts/readthedocs.org/user_builds/isodata/checkouts/latest/gridstatus/nyiso.py:1515: FutureWarning: Parsed string "07/25/26 07:45 EDT" included an un-recognized timezone "EDT". Dropping unrecognized timezones is deprecated; in a future version this will raise. Instead pass the string without the timezone, then use .tz_localize to convert to a recognized timezone.
  return pd.Timestamp(last_updated_date, tz=self.default_timezone)

	Time	Interval Start	Interval End	Forecast Time	Load Forecast
0	2026-07-26 00:00:00-04:00	2026-07-26 00:00:00-04:00	2026-07-26 01:00:00-04:00	2026-07-25 07:45:00-04:00	16447
1	2026-07-26 01:00:00-04:00	2026-07-26 01:00:00-04:00	2026-07-26 02:00:00-04:00	2026-07-25 07:45:00-04:00	15677
2	2026-07-26 02:00:00-04:00	2026-07-26 02:00:00-04:00	2026-07-26 03:00:00-04:00	2026-07-25 07:45:00-04:00	15099
3	2026-07-26 03:00:00-04:00	2026-07-26 03:00:00-04:00	2026-07-26 04:00:00-04:00	2026-07-25 07:45:00-04:00	14680
4	2026-07-26 04:00:00-04:00	2026-07-26 04:00:00-04:00	2026-07-26 05:00:00-04:00	2026-07-25 07:45:00-04:00	14438
...	...	...	...	...	...
139	2026-07-31 19:00:00-04:00	2026-07-31 19:00:00-04:00	2026-07-31 20:00:00-04:00	2026-07-25 07:45:00-04:00	23988
140	2026-07-31 20:00:00-04:00	2026-07-31 20:00:00-04:00	2026-07-31 21:00:00-04:00	2026-07-25 07:45:00-04:00	23555
141	2026-07-31 21:00:00-04:00	2026-07-31 21:00:00-04:00	2026-07-31 22:00:00-04:00	2026-07-25 07:45:00-04:00	22759
142	2026-07-31 22:00:00-04:00	2026-07-31 22:00:00-04:00	2026-07-31 23:00:00-04:00	2026-07-25 07:45:00-04:00	21535
143	2026-07-31 23:00:00-04:00	2026-07-31 23:00:00-04:00	2026-08-01 00:00:00-04:00	2026-07-25 07:45:00-04:00	20225

144 rows × 5 columns

Historical Data

You can use the historical method calls to get data for a specific day in the past. For example,

caiso.get_load("Jan 1, 2020")

2026-07-27 00:12:48 - INFO - Fetching URL: https://www.caiso.com/outlook/history/20200101/demand.csv?_=1785111168

	Time	Interval Start	Interval End	Load
0	2020-01-01 00:00:00-08:00	2020-01-01 00:00:00-08:00	2020-01-01 00:05:00-08:00	21533
1	2020-01-01 00:05:00-08:00	2020-01-01 00:05:00-08:00	2020-01-01 00:10:00-08:00	21429
2	2020-01-01 00:10:00-08:00	2020-01-01 00:10:00-08:00	2020-01-01 00:15:00-08:00	21320
3	2020-01-01 00:15:00-08:00	2020-01-01 00:15:00-08:00	2020-01-01 00:20:00-08:00	21272
4	2020-01-01 00:20:00-08:00	2020-01-01 00:20:00-08:00	2020-01-01 00:25:00-08:00	21193
...	...	...	...	...
283	2020-01-01 23:35:00-08:00	2020-01-01 23:35:00-08:00	2020-01-01 23:40:00-08:00	20494
284	2020-01-01 23:40:00-08:00	2020-01-01 23:40:00-08:00	2020-01-01 23:45:00-08:00	20383
285	2020-01-01 23:45:00-08:00	2020-01-01 23:45:00-08:00	2020-01-01 23:50:00-08:00	20297
286	2020-01-01 23:50:00-08:00	2020-01-01 23:50:00-08:00	2020-01-01 23:55:00-08:00	20242
287	2020-01-01 23:55:00-08:00	2020-01-01 23:55:00-08:00	2020-01-02 00:00:00-08:00	20128

288 rows × 4 columns

Frequently, we want to get data across multiple days. We can do that by providing a start and end parameter to any iso.get_* method

caiso_load = caiso.get_load(start="Jan 1, 2021", end="Feb 1, 2021")
caiso_load

	Time	Interval Start	Interval End	Load
0	2021-01-01 00:00:00-08:00	2021-01-01 00:00:00-08:00	2021-01-01 00:05:00-08:00	21937.0
1	2021-01-01 00:05:00-08:00	2021-01-01 00:05:00-08:00	2021-01-01 00:10:00-08:00	21858.0
2	2021-01-01 00:10:00-08:00	2021-01-01 00:10:00-08:00	2021-01-01 00:15:00-08:00	21827.0
3	2021-01-01 00:15:00-08:00	2021-01-01 00:15:00-08:00	2021-01-01 00:20:00-08:00	21757.0
4	2021-01-01 00:20:00-08:00	2021-01-01 00:20:00-08:00	2021-01-01 00:25:00-08:00	21664.0
...	...	...	...	...
8923	2021-01-31 23:35:00-08:00	2021-01-31 23:35:00-08:00	2021-01-31 23:40:00-08:00	20054.0
8924	2021-01-31 23:40:00-08:00	2021-01-31 23:40:00-08:00	2021-01-31 23:45:00-08:00	19952.0
8925	2021-01-31 23:45:00-08:00	2021-01-31 23:45:00-08:00	2021-01-31 23:50:00-08:00	19859.0
8926	2021-01-31 23:50:00-08:00	2021-01-31 23:50:00-08:00	2021-01-31 23:55:00-08:00	19763.0
8927	2021-01-31 23:55:00-08:00	2021-01-31 23:55:00-08:00	2021-02-01 00:00:00-08:00	19650.0

8928 rows × 4 columns

We can now see there is data for all of January 2021

import plotly.express as px

fig = px.line(caiso_load, x="Time", y="Load", title="CAISO Load - Jan '21")
fig

Next Steps

The best part is these APIs work in the same way across all the supported ISOs!

Getting Started

• Installation
• LMP Pricing Data
• Interconnection Queues
  • NYISO
  • CAISO
  • SPP
  • Ercot
  • MISO
  • ISONE
  • PJM

Examples

• CAISO Examples
  • Get CAISO Ancillary Services
    • Ancillary Services Prices
    • Additional Ancillary Services Data
      • Available columns
  • Load, Fuel Mix, and LMP Data
    • Historical Fuel Mix
    • Historical Load
    • Historical Locational Marginal Pricing (LMP)
    • Gas Prices
  • Solar and Wind Curtailment
    • Get Curtailment Data
    • Visualizing Curtailment
      • Cumulative Curtailment by Year
      • Monthly Curtailment
      • Average Hourly Curtailment
  • Heatmap of Day Ahead LMPs
    • Get LMPs
    • Make Heatmap
  • Downloading CAISO Oasis Datasets
• ERCOT Examples
  • Get ERCOT Ancillary Services Prices
    • Get Ancillary Services Prices
    • Get Historical AS Prices
  • Settlement Point Prices
    • The get_spp Method
      • Date
      • Market
      • Location Type
    • Example: Fetch latest real-time market (RTM) by zone
    • Example: Fetch day-ahead market (DAM) for today by hub
    • Example: Fetch DAM for 2 days ago by node
• ERCOT API Examples
  • ERCOT API Examples
    • Step 0: List All Endpoints
    • Step 1: Describe an Endpoint
    • Step 2: Call an Endpoint
• NYISO Examples
  • Capacity Price Data
  • Fuel Mix Over Time
    • Get Fuel MIx Data
• PJM Examples
  • Load Data Examples
    • Walkthrough on how to query Load data from PJM using gridstatus
    • Get Load Data
    • Query for Date Range
  • LMP Data Examples
    • Walkthrough on how to query LMP data from PJM using gridstatus
    • Available Markets
    • Query LMPs for Hubs
    • Query by Date Range
    • Query LMP All Nodes
    • Query by Location Type
    • Query Real Time 5 Minute Market
    • Get List of Node Ids
• SPP Examples
  • LMP Data Examples
    • Walkthrough on how to query LMP data from SPP using gridstatus
    • Available Markets
    • Available Location Types
    • Query Latest Real-Time LMPs by Hub
    • Query Latest Real-Time LMPs by Settlement Location
    • Query Latest Real-Time LMPs by Interface
    • Query Today’s Real-Time LMPs by Interface
    • Query Day-Ahead LMPs by Hub
    • Query Day-Ahead LMPs by Interface
• IESO Examples
  • IESO Load Examples
    • Get Five Minute Load
    • Load Forecast
    • Zonal Load Forecast
    • Fuel Mix
    • Generator Output and Capability/Available Capacity
• Other Examples
  • Interconnection Queues
    • NYISO Interconnection Queue
    • Days in Queue
    • Top Active Project Types
    • Proposed Completion Date
    • Get Interconnection Queue Data from All ISOs

Reference

• API Reference
• Changelog
• Contributing