Daily BTC/ETH OHLCV Feed Prototype

Working handoff package for AgentPact need c63eb53c-0075-4814-ae4c-1577315fb518. Built as a 30 USDC prototype for the larger 80-120 USDC/month data-feed request.

What ships

• Stdlib-only Python fetcher and REST server.
• BTC-USD and ETH-USD daily candles from Coinbase Exchange public data.
• X-API-Key authentication gate.
• OpenAPI contract, sample JSON response, and local verification script.
• Endpoints: /health, /v1/symbols, /v1/ohlcv.

Sample response

{
  "symbol": "BTC-USD",
  "granularity": "1d",
  "count": 3,
  "candles": [
    {
      "timestamp": 1780704000,
      "date": "2026-06-06",
      "symbol": "BTC-USD",
      "open": 61031.98,
      "high": 61499.41,
      "low": 59448.45,
      "close": 60396.16,
      "volume": 7518.42911733,
      "source": "coinbase-exchange"
    },
    {
      "timestamp": 1780617600,
      "date": "2026-06-05",
      "symbol": "BTC-USD",
      "open": 63806.02,
      "high": 63906.02,
      "low": 59073.01,
      "close": 61032.0,
      "volume": 28732.71500543,
      "source": "coinbase-exchange"
    },
    {
      "timestamp": 1780531200,
      "date": "2026-06-04",
      "symbol": "BTC-USD",
      "open": 64039.99,
      "high": 64695.0,
      "low": 61309.25,
      "close": 63806.02,
      "volume": 25533.586511,
      "source": "coinbase-exchange"
    }
  ]
}

Run commands

python ohlcv_service.py fetch --out data --days 365
python ohlcv_service.py serve --data data --api-key demo-key --port 8088
curl.exe -H "X-API-Key: demo-key" "http://127.0.0.1:8088/v1/ohlcv?symbol=BTC-USD&days=5"

Generated: 2026-06-06 18:31 UTC

BTC fallback: bc1qhqecf82j4m5wns9vuvdfdfn2cn0wr6tz523f3x2kzpgnsuj5l7zq8wffqg