API ผลตอบแทนคริปโต สำหรับอัตราแลกเปลี่ยนแบบสดและประวัติศาสตร์

// Best stablecoin yield: fetch USDC lending rates, sort by rate
const res = await fetch(
  "https://api.bitcompare.net/api/v1/rates/USDC?category=lending",
  { headers: { Authorization: `Bearer ${process.env.BITCOMPARE_API_KEY}` } }
)
const { data } = await res.json()
const best = data.rates.sort((a, b) => Number(b.rate) - Number(a.rate))[0]

{
  "data": {
    "symbol": "USDC",
    "rates": [
      {
        "provider": "aqru",
        "symbol": "USDC",
        "category": "lending",
        "rate": 6,
        "metadata": null,
        "lastUpdated": "2026-07-18T09:35:29.061Z",
        "coinId": "usd-coin",
        "providerSymbol": "USDC",
        "unitType": "absolute",
        "unitSymbol": null
      },
      {
        "provider": "aave-v3",
        "symbol": "USDC",
        "category": "lending",
        "rate": 3.21367115,
        "metadata": {
          "mode": "aave_liquidity_rate",
          "method": "getReserveData",
          "source": "onchain_rate",
          "chainId": 1,
          "contract": "0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2"
        },
        "lastUpdated": "2026-07-18T09:35:18.966Z",
        "coinId": "usd-coin",
        "providerSymbol": "USDC",
        "unitType": "absolute",
        "unitSymbol": null
      }
    ],
    "count": 19
  }
}

# Track staking rewards for ETH
curl -s "https://api.bitcompare.net/api/v1/rates/ETH?category=staking" \
  -H "Authorization: Bearer $BITCOMPARE_API_KEY"

{
  "data": {
    "symbol": "ETH",
    "rates": [
      {
        "provider": "lido",
        "symbol": "ETH",
        "category": "staking",
        "rate": 2.207,
        "metadata": null,
        "lastUpdated": "2026-07-18T09:30:57.661Z",
        "coinId": "ethereum",
        "providerSymbol": "ETH",
        "unitType": "absolute",
        "unitSymbol": null
      },
      {
        "provider": "stakin",
        "symbol": "ETH",
        "category": "staking",
        "rate": 2.71,
        "metadata": null,
        "lastUpdated": "2026-07-18T09:30:23.275Z",
        "coinId": "ethereum",
        "providerSymbol": "ETH",
        "unitType": "absolute",
        "unitSymbol": null
      }
    ],
    "count": 12
  }
}

// Compare BTC lending vs borrowing rates (one call per category)
const [lending, borrowing] = await Promise.all(
  ["lending", "borrowing"].map((category) =>
    fetch(
      `https://api.bitcompare.net/api/v1/rates/BTC?category=${category}`,
      { headers: { Authorization: `Bearer ${process.env.BITCOMPARE_API_KEY}` } }
    ).then((r) => r.json())
  )
)
const spread =
  Number(borrowing.data.rates[0].rate) - Number(lending.data.rates[0].rate)

{
  "data": {
    "symbol": "BTC",
    "rates": [
      {
        "provider": "bitfinex",
        "symbol": "BTC",
        "category": "lending",
        "rate": 0.0016,
        "metadata": null,
        "lastUpdated": "2026-07-18T09:35:51.677Z",
        "coinId": "bitcoin",
        "providerSymbol": "BTC",
        "unitType": "absolute",
        "unitSymbol": null
      },
      {
        "provider": "aqru",
        "symbol": "BTC",
        "category": "lending",
        "rate": 2.5,
        "metadata": null,
        "lastUpdated": "2026-07-18T09:35:29.061Z",
        "coinId": "bitcoin",
        "providerSymbol": "BTC",
        "unitType": "absolute",
        "unitSymbol": null
      }
    ],
    "count": 16
  }
}