Uniswap launched Aggregator Hooks to access external DEX liquidity

Uniswap Labs has launched Aggregator Hooks, integrating external decentralized exchange quotes into the Ethereum mainnet, Base, and Robinhood Chain's v4 routing system in its web application and API. At launch, it connects to 7 external sources; Uniswap claims it covers over 90% of DEX activity on supported networks, but does not guarantee optimal execution for every trade.

The routing engine can compare quotes on a block-by-block basis and settle exchanges involving Uniswap and external venues within a single transaction, without requiring additional token authorization due to accessing external liquidity. Exchanges routed through Aggregator Hooks can generate protocol fees that support UNI burn, and developers can integrate the new routing through the Uniswap API; the actual impact on price differences and trading volume still needs to be validated in real trading scenarios.