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KR Rates FX - Kimchi Premium & Korean Crypto FX Data
x402
KR Rates FX - Kimchi Premium & Korean Crypto FX Data is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Returns the Korea-USD FX rate, BTC/ETH prices on Upbit in KRW, global USD prices, and kimchi premium percentages (both FX-adjusted and USDT-adjusted).
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON object with an 'assets' array (one entry per requested symbol) each containing Upbit KRW price, global USD price, FX-adjusted kimchi premium %, and USDT-adjusted kimchi premium %; plus the USD/KRW FX rate, Upbit USDT/KRW rate, data source URLs, and an updated_at timestamp.
Example use cases
Kimchi premium arbitrage check
“Check the current kimchi premium for BTC — what's the price gap between Upbit in Korea and the global USD price, and how big is the premium in percentage terms both FX-adjusted and USDT-adjusted?”
Korean FX rate for stablecoin trader
“What's the current USD/KRW exchange rate and how does the Upbit USDT/KRW rate compare? I want to understand the FX spread for moving stablecoins in and out of Korean exchanges.”
Multi-coin Korean price monitor
“Pull the latest Upbit prices and global USD prices for BTC and ETH so I can track the kimchi premium for both coins and see if there's a meaningful spread developing.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/kr-rates-fx-v1?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need Korean crypto exchange prices (Upbit KRW), the kimchi premium (both FX and USDT adjusted), or the USD/KRW FX rate in a single call — especially for arbitrage monitoring or Korea-specific market analysis. Prefer this over generic crypto price APIs when the Korea-vs-global price gap is the core signal needed. No API key required; pay $0.002 USDC per call via x402 on Base.
Side effects
- Upstream exchange API unavailability (Upbit, Coinbase, Kraken, Bitstamp) causes stale or missing prices
- FX rate provider (open.er-api.com) downtime causes FX-adjusted premium to fail
- Invalid or unrecognized symbol in 'symbols' query param returns empty or partial asset list
- x402 payment failure (insufficient USDC balance or wrong network) blocks access with HTTP 402
- Cold-start latency on Cloudflare Workers may cause occasional timeout on first request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"assets": [
{
"symbol": "BTC",
"upbit_krw": 108533000,
"global_usd": 80867.7,
"premium_pct_fx": 1.15,
"premium_pct_usdt": 0.16
},
{
"symbol": "ETH",
"upbit_krw": 3162000,
"global_usd": 2356.1,
"premium_pct_fx": 1.15,
"premium_pct_usdt": 0.15
}
],
"usdkrw": 1326.8,
"sources": [
"https://api.upbit.com",
"https://api.exchange.coinbase.com",
"https://api.kraken.com",
"https://www.bitstamp.net",
"https://open.er-api.com"
],
"updated_at": "2026-10-28T03:00:00Z",
"upbit_usdt_krw": 1340
}
}Tags
x402
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