{"id":"uniswapx","title":"UniswapX","content":"**UniswapX** is a permissionless trading protocol that focuses on facilitating intent-based, gas-free, and MEV-protected swaps across multiple liquidity sources. UniswapX enhances onchain trading while preserving self-custody for its users. [\\[1\\]](#cite-id-gYe5pWGF3YX6cqHB)​\n\n## Overview\n\nLaunched on July 17, 2023, UniswapX is an intent-based trading protocol that introduces a Dutch auction-based model for trading within the [Ethereum](https://iq.wiki/wiki/ethereum) Virtual Machine environment. \n\nUnlike conventional methods where transactions are directly submitted to an AMM pool, UniswapX allows users to sign off-chain swap orders. These orders are then executed by third-party fillers who compete in a Dutch auction framework. \n\nThis intent-based system facilitates gas-free trades and ensures protection against Maximal Extractable Value (MEV). UniswapX supports both single-chain and cross-chain swaps, enhancing the trading ecosystem for retail wallets. [\\[2\\]](#cite-id-6unAfNLTM7hsx7Qx)​\n\n## Key Features\n\n### Aggregating Liquidity Sources\n\nThe protocol employs a Dutch auction model to aggregate liquidity from various automated market makers (AMMs) and other sources. Fillers, or third-party entities, compete to offer the most competitive prices. \n\nThis competition optimizes pricing by routing orders through a diverse network of liquidity venues. The network benefits swappers by ensuring transparency and eliminating the need for manual integrations. [\\[3\\]](#cite-id-uUHCldPRsPf5X9tn)​\n\n### Gas-Free Swapping\n\nUniswapX eliminates gas fees for swaps. Swappers sign unique offchain orders, and fillers submit these onchain, bearing the gas costs themselves. This method removes the necessity for users to hold native network tokens like ETH for their swaps. \n\nThe structure ensures that swappers do not incur costs from failed transactions, providing a robust and economical trading platform. [\\[1\\]](#cite-id-gYe5pWGF3YX6cqHB)​\n\n### Protection Against Maximal Extractable Value (MEV)\n\nUniswapX safeguards efficiency by internalizing MEV that often disadvantages swappers. It redistributes potential MEV gains back to the user in the form of price improvements. \n\nThe system further discourages traditional arbitrage approaches by encouraging fillers to use private transaction relays, thereby mitigating sandwich attacks. [\\[1\\]](#cite-id-gYe5pWGF3YX6cqHB)​\n\n### Order Parameterization\n\nOrders in UniswapX do not follow a strict decay function for pricing. Instead, they allow parameterization through an off-chain Request For Quote (RFQ) system. This flexibility lets fillers compete to offer their best prices, refining user experience through adjustable initial pricing in Dutch auctions. [\\[1\\]](#cite-id-gYe5pWGF3YX6cqHB)​\n\n### Fees\n\nUniswap Governance can levy a fee up to 0.05% on each UniswapX swap output. Furthermore, interfaces and wallets have the option to impose additional, uncapped fees on the swaps processed through their platforms. [\\[1\\]](#cite-id-gYe5pWGF3YX6cqHB)​\n\n## How it Works\n\nIn UniswapX, users begin by signing an off-chain order that sets parameters for the swap, including the input token, desired minimum output, and transaction deadline. \n\nThese signed orders are publicly broadcast through an orderflow API. Fillers, observing these orders, submit them on-chain once it becomes economically feasible for them to satisfy the order within the auction's constraints. \n\nSettlement occurs via the Reactor contract, which verifies the signatures, confirms the achievement of order requirements, and enacts the token transfers seamlessly, ensuring a transparent and non-custodial trading environment. [\\[2\\]](#cite-id-6unAfNLTM7hsx7Qx)​\n\n## Cross-Chain Swaps\n\nUniswapX supports cross-chain orders, allowing users to engage seamlessly between different blockchain networks. The protocol aims to merge swapping and bridging functionalities, offering a unified action that connects disparate chains. \n\nThis innovation facilitates quick and efficient transactions across networks, enabling users to choose the specific assets they wish to receive on the destination chain. [\\[3\\]](#cite-id-uUHCldPRsPf5X9tn)​","summary":"Intent-based, non-custodial protocol enabling gas-free, MEV-protected swaps via off-chain orders and competitive on-chain fillers.","images":[{"id":"QmcyUn1hy5MATfiSV852vbrvhksycArRuGunete1b2oSSs","type":"image/jpeg, image/png"}],"categories":[{"id":"projects-and-protocols","title":"Projects & Protocols"}],"tags":[{"id":"DeFi"},{"id":"Infrastructure"}],"media":[{"id":"QmUyz84kmc4aVFun7vDv3VCEdEw3HjB9mQ9NupH7BU2XLV","size":"0.51","name":"image","type":"GALLERY","source":"IPFS_IMG"},{"id":"https://www.youtube.com/watch?v=BNePCzCu23M","size":"0","name":"BNePCzCu23M","type":null,"source":"YOUTUBE"},{"id":"QmYuGbbbMFKPo6T5KQuunj1xkcuhrpKxfwZDGWf1HapSQk","size":"0.05","name":"uni cross chain.PNG","type":"GALLERY","source":"IPFS_IMG"},{"id":"https://www.youtube.com/watch?v=L8vIw_lQ26E","size":"0","name":"L8vIw_lQ26E","type":null,"source":"YOUTUBE"}],"metadata":[{"id":"website","value":"https://app.uniswap.org/#/swap"},{"id":"twitter_profile","value":"https://twitter.com/Uniswap"},{"id":"discord_profile","value":"https://discord.gg/FCfyBSbCU5"},{"id":"github_profile","value":"https://github.com/Uniswap"},{"id":"references","value":"[{\"id\":\"gYe5pWGF3YX6cqHB\",\"url\":\"https://developers.uniswap.org/docs/liquidity/uniswapx/overview\",\"description\":\"Uniswap Developer Documentation 2026 Guide\",\"timestamp\":1787154209012},{\"id\":\"6unAfNLTM7hsx7Qx\",\"url\":\"https://eco.com/support/en/articles/11852773-what-is-uniswapx-2026-guide\",\"description\":\"Eco 2026 Guide\",\"timestamp\":1787154209012},{\"id\":\"uUHCldPRsPf5X9tn\",\"url\":\"https://milkroad.com/uniswapx\",\"description\":\"Milk Road Article\",\"timestamp\":1787154209012}]"},{"id":"previous_cid","value":"\"https://ipfs.everipedia.org/ipfs/QmQM5F5MgDUAGUAunktVbomjt7F5hEaJtN5wA79fZ1FiUE\""},{"id":"commit-message","value":"\"Updated category [projects-and-protocols] -> [Projects & Protocols]; 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