🗄️Developer Resource // JSON Endpoint
CMU JSON Data API
Access 158 data points for CMU spanning 40 years (1987–Apr 22, 2026). Optimized JSON format (23.1 KB).
Route this JSON into your sovereign workspace — command the Terminal.
Endpoint-first sovereignty: no shared warehouse of your raw ledger.
Download as CSV
Prefer CSV format? Download CMU historical data as a CSV file for Excel, Google Sheets, or any spreadsheet application.
GET /api/tickers/CMU/json● 200 OK (Live)Tired of exporting to Excel? Track CMU and analyze your portfolio locally with Pocket Portfolio.
Start Free — Local First{
"symbol": "CMU",
"timestamp": "2026-04-22T20:51:30.424Z",
"price": 3.66,
"change_24h": -0.5434782608695656,
"history_sample": [
{
"date": "1987-03-01",
"open": 9.75,
"high": 9.88,
"low": 8.88,
"close": 9.38,
"volume": 1286200
},
{
"date": "1987-06-01",
"open": 9.25,
"high": 9.5,
"low": 8.88,
"close": 9,
"volume": 1612000
}
]
}💻
Import via CLI
Don't scrape. Use our open-source importer to normalize this dataset directly into your local database.
npx pocket-portfolio --import CMU🛡️
Need to archive this data?
Don't rely on ephemeral endpoints. Automatically sync CMU.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)