Launch AppUtility
🗄️Developer Resource // JSON Endpoint

CPK JSON Data API

Access 167 data points for CPK spanning 42 years (1984–Mar 13, 2026). Optimized JSON format (24.5 KB).

Download as CSV

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

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

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{
  "symbol": "CPK",
  "timestamp": "2026-03-15T23:42:31.758Z",
  "price": 130.65,
  "change_24h": 1.1066398390342105,
  "history_sample": [
    {
      "date": "1984-12-01",
      "open": 6.44,
      "high": 7.7,
      "low": 6.44,
      "close": 7.48,
      "volume": 78645
    },
    {
      "date": "1985-03-01",
      "open": 7.48,
      "high": 7.78,
      "low": 7.04,
      "close": 7.3,
      "volume": 119487
    }
  ]
}
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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 CPK
🛡️

Need to archive this data?

Don't rely on ephemeral endpoints. Automatically sync CPK.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)