The Uniswap V3 Liquidity Estimator offers insight into the token reserves on Uniswap V3.
This data shows the liquidity across all the price levels for a specific pair of tokens on Uniswap V3. Each price level has a range, which is shown as lower_tick (the lowest price of the level) and upper_tick (the highest price of the level). The data shows you the amount of tokens and liquidity available at each price level.
We display all price-levels up to 10% either side of the current block price. The data is provided in a block-by-block granularity.
Access the methodology here.