🗄️Developer Resource // JSON Endpoint

ES JSON Data API

Instant, normalized JSON data for ES. Free API for developers. No login required.

Local-first charts from this JSON — open the Terminal.
Parse and visualize without shipping raw ledgers to a vendor database.

Download as CSV

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

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

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

Start Free — Local First
{
  "symbol": "ES",
  "timestamp": "2026-04-19T23:38:56.340Z",
  "price": null,
  "change_24h": null,
  "history_sample": []
}
💻

Import via CLI

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

npx pocket-portfolio --import ES
🛡️

Need to archive this data?

Don't rely on ephemeral endpoints. Automatically sync ES.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)
> system_ready. Initialize Sovereign reasoning for this asset?[Y]— open Terminal