# Uniswap Labs Launches v4 Aggregator Hooks on Three Networks By Simon Yoon Canonical URL: https://www.tokenpost.com/news/technology/38627 Published: 2026-10-23T03:14:32.000Z Updated: 2026-10-23T03:14:32.000Z Section: Technology > The feature is live on the Uniswap Web App and API, with seven external liquidity sources supported at launch. Uniswap Labs has introduced Aggregator Hooks for Uniswap v4, making seven outside liquidity sources available to swaps across three networks in one transaction without an additional user approval. The feature is live on the Uniswap Web App and API for Ethereum mainnet, Base and Robinhood Chain. Uniswap v4 hooks are add-on code attached to pools, where [they can set rules for individual pools](). The router pulls fresh quotes from connected sources every block. When a user swaps, it builds the most efficient route it can see across Uniswap pools and outside sources, then settles the trade in one transaction. Swaps using Aggregator Hooks incur protocol fees that go toward burning Uniswap (UNI), the protocol’s governance token. ## Links in this article - [they can set rules for individual pools](https://www.tokenpost.com/news/technology/35717)