Launch AppUtility
🗄️Developer Resource // JSON Endpoint

EXTR JSON Data API

Access 324 data points for EXTR spanning 27 years (1999–Mar 6, 2026). Optimized JSON format (47.5 KB).

Download as CSV

Prefer CSV format? Download EXTR historical data as a CSV file for Excel, Google Sheets, or any spreadsheet application.

GET /api/tickers/EXTR/json● 200 OK (Live)

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{
  "symbol": "EXTR",
  "timestamp": "2026-03-08T10:42:09.990Z",
  "price": 13.98,
  "change_24h": -3.18559556786703,
  "history_sample": [
    {
      "date": "1999-05-01",
      "open": 27.88,
      "high": 27.97,
      "low": 18.56,
      "close": 21.31,
      "volume": 14197200
    },
    {
      "date": "1999-06-01",
      "open": 21.56,
      "high": 29.5,
      "low": 19.25,
      "close": 29.03,
      "volume": 11939600
    }
  ]
}
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Import via CLI

Don't scrape. Use our open-source importer to normalize this dataset directly into your local database.

npx pocket-portfolio --import EXTR
🛡️

Need to archive this data?

Don't rely on ephemeral endpoints. Automatically sync EXTR.json updates to your private Google Drive for backtesting and compliance.

Enable Sovereign Sync

Includes unlimited API calls & historical CSV exports.

Dataset Specifications

  • Format: Standardized JSON (OHLCV)
  • Frequency: End-of-Day (EOD) + Real-time delay
  • Adjustments: Split-adjusted, Dividend-adjusted
  • Source: Multi-provider aggregation (AlphaVantage, Yahoo fallback)