Uniswap Labs announced that Aggregator Hooks are now live on Ethereum, Base, and Robinhood Chain. The feature integrates external platform liquidity into Uniswap v4 to help users find better trading routes. Fluid, Curve, and PancakeSwap are the first external liquidity sources available through the Uniswap web app and API. Built on Uniswap v4's Hooks functionality, Aggregator Hooks wrap external platform liquidity as Uniswap v4 pools, allowing the protocol to compare its own prices against external platforms and complete swaps in a single transaction. Trades executed through external liquidity sources will pay protocol fees, which are used to burn UNI tokens. Uniswap's cumulative trading volume has surpassed $4.5 trillion.