This API pulls data from various Bitcoin ETF issuers and exposes it as JSON.

Documentation

Data for Supported ETFs

Ticker Description Holdings Change Change % As of Date BT
ARKB ARK 21Shares Bitcoin ETF 45,018 0 0.00 2025-10-16 BT
BITB Bitwise Bitcoin ETF 41,265 0 0.00 2025-10-14 BT
BTC Grayscale Bitcoin Mini Trust ETF 48,268 0 0.00 2025-10-15 BT
BTCC Purpose Bitcoin ETF 20,455 +15 +0.07 2025-10-15 BT
FBTC Fidelity Wise Origin Bitcoin Fund 207,653 +1,177 +0.57 2025-10-14 BT
GBTC Grayscale Bitcoin Trust ETF 174,676 -7 -0.00 2025-10-15 BT
IBIT iShares Bitcoin Trust ETF 805,194 -272 -0.03 2025-10-14 BT