Quickstart

export ARTEMIS_API_KEY="your-key-here"

curl -s "https://data-svc.artemisxyz.com/v2/data/OPEN_INTEREST?symbols=kalshi&startDate=2026-08-01&endDate=2026-08-01&APIKey=$ARTEMIS_API_KEY"

{
  "series_columns": ["timestamp", "value"],
  "series": [
    {
      "asset": "kalshi",
      "metric": "OPEN_INTEREST",
      "metric_display_name": "Open Interest",
      "data": [[1785542400000, 700293307.0]],
      "display_name": "Kalshi",
      "color": "#01C685"
    }
  ]
}

import os
import requests

resp = requests.get(
    "https://data-svc.artemisxyz.com/v2/data/OPEN_INTEREST,SPOT_VOLUME",
    params={
        "symbols": "kalshi,polymarket",
        "startDate": "2026-07-25",
        "endDate": "2026-08-01",
        "APIKey": os.environ["ARTEMIS_API_KEY"],
    },
    timeout=60,
)
resp.raise_for_status()

for s in resp.json()["series"]:
    latest = s["data"][-1]
    print(f"{s['display_name']:12} {s['metric']:14} {latest[1]:,.0f}")