KimchiPremium

Kimchi Premium API

A free, no-key JSON API for the live gap between Korean (Upbit) and global (Binance) crypto prices. CORS-enabled, updated every minute.

Free to use. No API key, no sign-up, callable from any origin.

Base URL

https://gfreee.com/api/v1

1. Live premium — all coins

GET /api/v1/kimchi-premium

Latest premium for every tracked coin.

Try it →

{
  "result": "ok",
  "updated_at": "2026-08-19T11:00:00",
  "count": 10,
  "note": "USDT-based premium...",
  "data": [
    {
      "symbol": "BTC",
      "name": "Bitcoin",
      "premium_pct": 0.035,
      "upbit_krw": 90447000,
      "binance_usdt": 64444.01,
      "usdt_krw": 1403,
      "snapshot_at": "2026-08-19T11:00:00"
    }
  ]
}

2. Daily history — one coin

GET /api/v1/kimchi-premium/{symbol}/daily

Daily open / high / low / close / average premium for a single coin.

Try it (BTC) →

{
  "result": "ok",
  "symbol": "BTC",
  "name": "Bitcoin",
  "count": 5,
  "data": [
    { "date": "2026-08-19", "open_pct": -0.02, "high_pct": 0.10,
      "low_pct": -0.18, "close_pct": -0.01, "avg_pct": -0.03, "samples": 300 }
  ]
}

Fields

Example — JavaScript

fetch('https://gfreee.com/api/v1/kimchi-premium')
  .then(r => r.json())
  .then(d => {
    d.data.forEach(c => console.log(c.symbol, c.premium_pct + '%'));
  });

Example — Python

import requests
r = requests.get('https://gfreee.com/api/v1/kimchi-premium')
for c in r.json()['data']:
    print(c['symbol'], c['premium_pct'], '%')

Notes & limits