UniswapX Live on Robinhood Chain
Posted: July 1, 2026 | Effective: July 1, 2026
UniswapX, Uniswap's intent-based execution layer, is now live on Robinhood Chain (chainId 4663), alongside the Uniswap Protocol (v2, v3, v4), the Apps, and the API. The Uniswap API will route swaps through UniswapX on Robinhood Chain when it offers the better priced route, bringing MEV protection, gasless swaps, and a competitive market maker network into the same API call you already make.
What changed?
UniswapX is available on Robinhood Chain through the Trading API. Robinhood Chain uses the Dutch V3 reactor, so the /quote request accepts UNISWAPX_LATEST or UNISWAPX_V3 in the protocols field. UNISWAPX_LATEST always resolves to the current UniswapX version on each chain, so requesting it returns UniswapX quotes on Robinhood Chain today and on future chains as UniswapX launches on them.
Reactor, quoter, and Permit2 addresses are on the UniswapX Deployments page, and the full contract set is on the v3 and v4 deployments pages.
Why did this change?
Expanding UniswapX to Robinhood Chain gives swappers access to MEV protection, gasless swaps, and competitive filler pricing.
What do I need to do?
If you are a filler or quoter, Robinhood Chain serves UniswapX orders through the Dutch V3 reactor. Exclusive quoters onboarded to the RFQ have access to these orders immediately. See Filling on Dutch V3 chains for the execution flow.
Confirm your quoter inspects tokenInChainId on incoming requests so you do not quote on chains you do not support. Respond with HTTP status code 204 for any chain you do not want to quote.
If you set the protocols field in your /quote requests and want UniswapX quotes on Robinhood Chain, include UNISWAPX_LATEST (or UNISWAPX_V3) along with any AMM protocols you already request (V2, V3, and/or V4). Because UniswapX quotes use different response shapes than AMM quotes, confirm your /quote parsing handles routing: "DUTCH_V3" with a DutchQuoteV3 quote. See the integration guide for response handling details.