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GET /v1/coinbase-premium

Returns the Coinbase Premium Index for BTC, ETH, and SOL — a real-time measure of U.S. capital flows and institutional activity.

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What is the Coinbase Premium?

The Coinbase Premium Index measures the price difference between Bitcoin (and other assets) traded on Coinbase — the leading U.S. regulated exchange — and the global market average across all other exchanges. Formula: Premium = (Coinbase Price - Global Average) / Global Average It serves as a key indicator of:
  • U.S. capital flows and institutional activity
  • Dollar-denominated buying/selling pressure
  • Regulated market sentiment vs. global sentiment

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Response

curl "https://api.crypton.dev/v1/coinbase-premium"

{
  "status": "ok",
  "timestamp": 1709640000000,
  "data": {
    "BTC": {
      "coinbase_price": 70084.80,
      "global_average": 70054.74,
      "premium": 0.000429,
      "premium_pct": 0.0429,
      "exchange_count": 12,
      "signal": "neutral",
      "updated_at": 1709639900
    },
    "ETH": {
      "coinbase_price": 2039.39,
      "global_average": 2039.00,
      "premium": 0.000189,
      "premium_pct": 0.0189,
      "exchange_count": 12,
      "signal": "neutral",
      "updated_at": 1709639900
    },
    "SOL": {
      "coinbase_price": 86.01,
      "global_average": 85.99,
      "premium": 0.000150,
      "premium_pct": 0.0150,
      "exchange_count": 12,
      "signal": "neutral",
      "updated_at": 1709639900
    }
  }
}

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Response Fields

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data
object
Map of symbol → premium data (BTC, ETH, SOL).

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Signal Interpretation

Premium (%)SignalMeaning
> +0.15%strong_us_buyingHeavy institutional/U.S. buying pressure
+0.05% to +0.15%moderate_us_buyingMild U.S. buying interest
-0.05% to +0.05%neutralNo significant regional divergence
-0.15% to -0.05%moderate_us_sellingMild U.S. selling pressure
< -0.15%strong_us_sellingHeavy U.S. risk-off / capital outflow

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Historical Context

PeriodTypical PremiumSignificance
2020-2021 Bull MarketSustained positiveInstitutional accumulation (Tesla, MicroStrategy)
2022-2023 Bear MarketFrequently negativeU.S. selling pressure, heightened fear
2024-2025VariableU.S. vs. Asian capital flow divergence
A sustained positive premium (>0.1%) during a rally suggests strong U.S. institutional conviction. A negative premium during a dip indicates U.S.-led selling — often a capitulation signal when combined with high liquidation volume.

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Data Sources

The global average is computed from 12+ exchanges: Binance, Bybit, OKX, Bitget, Gate.io, KuCoin, MEXC, HTX, Hyperliquid, dYdX, Drift, Backpack, and others. All prices are polled every ~30 seconds. The Coinbase price comes from the api.exchange.coinbase.com spot ticker.

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Live Testing

# Full premium index
curl -s "https://api.crypton.dev/v1/coinbase-premium" | jq .

# Just BTC premium
curl -s "https://api.crypton.dev/v1/coinbase-premium" | jq '.data.BTC'