Bitcoin Treasuries API

Treasury, ETF and market data is available through the Bitbo API, included with a Bitbo Pro++ subscription. It covers ETF holdings and flows, market cap and supply, MSTR metrics, and 130+ other Bitcoin data series — each with full history.

How to get access

Subscribe to Bitbo Pro++ and your API key is waiting in your account. Everything else — the key, the docs and the full endpoint list — is available once you're signed up.

See plans and pricing →

Example

Daily IBIT holdings:

curl "https://charts.bitbo.io/api/v1/etf-holdings/?etf_ticker=IBIT&start_date=2025-12-15&end_date=2025-12-17&api_key=YOUR_API_KEY"

Response:

{
  "data": [
    [
      "2025-12-15",
      "778052.2337",
      "239031.4337",
      "-19506.1469"
    ],
    [
      "2025-12-16",
      "778052.2337",
      "235096.3337",
      "-19506.1469"
    ],
    [
      "2025-12-17",
      "778052.2337",
      "228135.9337",
      "-12016.6429"
    ]
  ]
}

Each row is [date, btc_holding, yoy_change, monthly_change]. Set latest=true for just the most recent value. Tickers: IBIT, FBTC, GBTC, BTC, BITB, ARKB, HODL, BTCO, BRRR, EZBC, MSBT, BTCW, DEFI. Full endpoint reference: ETF Holdings docs.

Rate limits

150,000 requests per month, 5 requests per 60 seconds. Get in touch if you need more, or have a use case that isn't covered by the standard plans.