isoview-client 1.0.4

Python client for the ISOview energy forecasting API

isoview-client

Python client for the ISOview energy forecasting API — demand, wind, solar, LMP, and natural gas forecasts across US ISOs, returned as dicts or pandas DataFrames.

Installation

pip install isoview-client

Requires Python 3.10+. Installs requests and pandas as dependencies.

Authentication

Sign up at isoview.io and grab your API key from the Portal.

from isoview import Client

client = Client("your-api-key")

How It Works

The client dynamically builds methods from the API's OpenAPI spec at init time. This means it automatically stays in sync with the API — no client updates needed when new endpoints are added. The spec is cached locally for 1 hour.

# See all available methods
dir(client)

# Get help on any method
help(client.get_regional_forecast)

Quick Start

from isoview import Client

client = Client("your-api-key")

# Get the latest PJM demand forecast as a dict
data = client.get_regional_forecast("pjm", "demand")

# Or get it directly as a pandas DataFrame
df = client.get_regional_forecast("pjm", "demand", as_df=True)
print(df.head())

Timeseries endpoints accept an as_df=True keyword argument to return a pandas DataFrame with a UTC DatetimeIndex and MultiIndex columns like ("pjm_total", "forecast"). Without it, you get the raw API response as a dict.

Examples

Regions

Forecasts for geographic regions within an ISO — demand, wind, solar, outages, and population-weighted temperature.

# See what regions are available
regions = client.list_regions("pjm", "demand")
# Returns a list of dicts: [{"id": "pjm_total", "name": "PJM Total", ...}, ...]

# Latest forecast as a DataFrame
df = client.get_regional_forecast("pjm", "demand", id="pjm_total", as_df=True)

# Stitched historical forecast — what did the day-ahead forecast
# look like at 10am each day?
df = client.get_region_continuous_forecast(
    "miso", "wind",
    start="2025-01-01T00:00:00Z",
    end="2025-06-01T00:00:00Z",
    latest_hour=10,
    days_ahead=1,
    as_df=True,
)

# Probabilistic ensemble forecast (multiple scenarios)
data = client.get_ensemble_forecast("pjm", "demand", id="pjm_total")

# Day-ahead backcast for model evaluation
data = client.get_region_day_ahead_backcast("pjm", "demand")

# Everything at once — demand, wind, solar, outages, temp, LMP
data = client.get_iso_summary("pjm")

Plants

Generation forecasts for individual wind and solar facilities.

# Browse plants in ERCOT
plants = client.list_plants("ercot", "wind")
print(plants[0]["name"], plants[0]["capacity_mw"], "MW")

# Get a forecast as a DataFrame
df = client.get_plant_forecast("ercot", "wind", id=str(plants[0]["id"]), as_df=True)

Counties

County-level electricity demand forecasts, disaggregated from regional data.

counties = client.list_counties("isone")
df = client.get_county_forecast("isone", id=counties[0]["id"], as_df=True)

Gas

Natural gas price forecasts for major trading hubs.

hubs = client.list_gas_hubs()
df = client.get_gas_price_forecast(id=hubs[0]["id"], as_df=True)

LMP

Locational Marginal Price forecasts for electricity market nodes.

nodes = client.list_lmp_nodes("pjm", "dalmp")
df = client.get_lmp_forecast("pjm", "dalmp", id=nodes[0]["id"], as_df=True)

Working with Responses

Timeseries (as dict)

All forecast, continuous, ensemble, backcast, and summary endpoints return a dict by default:

data = client.get_regional_forecast("pjm", "demand")

data["model"]       # 'optimized'
data["created_at"]  # datetime — when the forecast was generated
data["units"]       # 'MW'
data["timezone"]    # 'America/New_York'
data["time_utc"]    # list of datetime objects
data["columns"]     # [["pjm_total", "forecast"], ...]
data["values"]      # [[1234.5, ...], ...]

Timeseries (as DataFrame)

Pass as_df=True to any timeseries endpoint:

df = client.get_regional_forecast("pjm", "demand", as_df=True)

The DataFrame has a DatetimeIndex and MultiIndex columns (e.g. ("pjm_total", "forecast")).

Metadata

List endpoints return plain dicts:

regions = client.list_regions("pjm", "demand")
for r in regions:
    print(r["id"], r["name"], r["timezone"])

plants = client.list_plants("ercot", "solar")
for p in plants:
    print(p["name"], f"{p['capacity_mw']} MW", p["state"])

Automatic Chunking

Requests spanning more than 365 days are automatically split into yearly chunks and merged:

df = client.get_region_day_ahead_backcast(
    "pjm", "demand",
    start="2023-01-01T00:00:00Z",
    end="2025-06-01T00:00:00Z",
    as_df=True,
)

Error Handling

The client raises requests.HTTPError on API errors (401, 403, 422, etc.):

import requests

try:
    data = client.get_regional_forecast("pjm", "demand")
except requests.HTTPError as e:
    print(e.response.status_code, e.response.text)

Links

• ISOview Portal — manage your account and API key
• API Documentation — full reference for all endpoints