🗄️Developer Resource // JSON Endpoint
CPK JSON Data API
Absolute endpoints (copy‑paste)
JSON:
https://www.pocketportfolio.app/api/tickers/CPK/json?range=maxCSV:
https://www.pocketportfolio.app/api/tickers/CPK/csv?range=maxAccess 168 data points for CPK spanning 42 years (1984–Jul 24, 2026). Optimized JSON format (24.6 KB).
Programmable Sovereign Interface — chart this JSON in the Terminal.
Local-first analysis. Stateless data. Your browser is the vault.
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)Tired of exporting to Excel? Track CPK and analyze your portfolio locally with Pocket Portfolio.
Start Free — Local First{
"symbol": "CPK",
"timestamp": "2026-07-24T22:37:23.401Z",
"price": 135.78,
"change_24h": 0.8691776242478176,
"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
}
]
}💻
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 SyncIncludes 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)