Quickstart

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Create a free account, generate an API key, and start querying demand forecasts. No credit card required.

Free tierNo credit card7 U.S. grids
1

See the forecast

Live data — the same feed the API returns

Live forecastActive

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2

Try the API

One endpoint, one key, JSON response

Request
# Get 48-hour CAISO forecast
curl "https://api.gramm.ai/v1/demand/forecast?region=CAISO&horizon=2d" \
  -H "Authorization: Bearer grmm_your_key"
Response200 OK · 47ms
{
  "status": "success",
  "data": [
    { "timestamp": "2026-04-11T08:00:00Z", "value_mw": 24523.4 },
    { "timestamp": "2026-04-11T09:00:00Z", "value_mw": 25891.7 }
  ],
  "meta": {
    "region": "CAISO",
    "horizon": "2d",
    "resolution": "1h",
    "count": 48
  }
}

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3

Create your account

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100
requests/hour on free tier
7
U.S. grids covered
<50ms
API response time
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