Launch AppUtility
🗄️Developer Resource // JSON Endpoint

ESI JSON Data API

Access 150 data points for ESI spanning 13 years (2013–Mar 6, 2026). Optimized JSON format (22.0 KB).

Download as CSV

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

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

Tired of exporting to Excel? Track ESI and analyze your portfolio locally with Pocket Portfolio.

Start Free — Local First
{
  "symbol": "ESI",
  "timestamp": "2026-03-09T03:23:07.505Z",
  "price": 30.73,
  "change_24h": -7.188160676532767,
  "history_sample": [
    {
      "date": "2013-11-01",
      "open": 11.85,
      "high": 12,
      "low": 11.85,
      "close": 12,
      "volume": 464000
    },
    {
      "date": "2013-12-01",
      "open": 12,
      "high": 14.05,
      "low": 12,
      "close": 14,
      "volume": 1762100
    }
  ]
}
💻

Import via CLI

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

npx pocket-portfolio --import ESI
🛡️

Need to archive this data?

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