TILLABitcoin & Ether spot ETF flows API
Every US spot Bitcoin and Ether ETF, fund by fund, daily — next to price, funding, open interest and macro on the same clock.
The daily flow tables most people read are web pages. TILLA serves the same numbers as an API: one column per fund, one row per day, in millions of US dollars, on the same UTC clock as the rest of the market, so a flow day lines up with that day's BTC close, funding rate and the dollar index without any joining.
What you get
- Bitcoin funds: IBIT, FBTC, GBTC, ARKB, BITB, HODL, BRRR, EZBC, BTCO, BTCW, MSBT and BTC, plus the daily total, the running total and the assets under management.
- Ether funds: ETHA, ETHE, FETH, ETHW, ETHV, QETH, EZET, ETHB, TETH and ETH, plus the daily total and assets under management.
- Daily bars from each fund's launch (Bitcoin funds from 2024-01-11). A day is filled once the issuers have all reported, and a later correction is delivered to you like any other repaired value.
- Indicators on the flows themselves — moving averages, z-scores, momentum, percentiles and distance from record highs, computed bar by bar with no look-ahead.
One call
GET https://api.tillacrypto.com/v1/builder/raw/daily?series=btc_etf_ibit,btc_etf_fbtc,btc_etf_flow,btc_close&period=30d
X-API-Key: tk_live_...Add &format=csv for a spreadsheet, or &format=parquet for pandas and Polars. The same columns are
available in Google Sheets and Excel, and to AI agents through the MCP server
(pip install tilla-mcp).
Which plan
ETF flows start at Builder ($49 a month, 6 months of history); Pro and Max reach further back. The free plan does not include them. See pricing.
What it is not
Flows are daily, as the issuers publish them; there are no intraday flows. TILLA is a data service, not advice.
FAQ
Do you have Bitcoin ETF flows per fund?
Yes - every US spot Bitcoin ETF (IBIT, FBTC, GBTC, ARKB and the rest), daily, one column per fund, plus the total, the running total and assets under management.
Do you have Ethereum ETF flows?
Yes - every US spot Ether ETF (ETHA, ETHE, FETH and the rest), daily, fund by fund, plus the total.
Are ETF flows intraday?
No. Issuers report once a day, so flows are daily bars. ETF prices are available on 1-minute bars.
Which plan includes ETF flows?
Builder and above. The free plan covers BTC, ETH, the S&P 500, gold, DXY, VIX and Fear & Greed.