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🗄️Developer Resource // JSON Endpoint

DSM JSON Data API

Access 435 data points for DSM spanning 37 years (1989–Jan 21, 2026). Optimized JSON format (63.7 KB).

GET /api/tickers/DSM/json● 200 OK (Live)
{
  "symbol": "DSM",
  "timestamp": "2026-01-21T23:46:09.245Z",
  "price": 6.05,
  "change_24h": -0.6568144499178987,
  "history_sample": [
    {
      "date": "1989-12-01",
      "open": 10.13,
      "high": 10.13,
      "low": 10,
      "close": 10,
      "volume": 1219400
    },
    {
      "date": "1990-01-01",
      "open": 10,
      "high": 10.13,
      "low": 10,
      "close": 10,
      "volume": 801900
    }
  ]
}
💻

Import via CLI

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

npx pocket-portfolio --import DSM
🛡️

Need to archive this data?

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