We will be sunsetting support for multiple legacy options for the routingPreference field in the /quote request of the trading API on August 18, 2025. What is changing? The routingPreference field in the /quote request will now only support the values of BEST_PRICE, or FASTEST. The legacy values of CLASSIC, BEST_PRICE_V2, UNISWAPX_V2, V3_ONLY, and V2_ONLY will all be removed. Submitting a request with one of these legacy values will result in an error. Why is this changing? This change helps clarify API request intent and will allow Uniswap Labs to expand the options for routing in the future. The routingPreference field will now only indicate the method of routing whereas the protocols field will indicate the protocols to be considered while executing the routing method. Both the remaining values for the routingPreference field and the protocols field have already been in service in the API for multiple years and are used by all new API integrators including the Uniswap Labs UI. What do I need to do? If you currently specify a routingPreference value which is being deprecated, you must make changes to only use one of the remaining supported values. You may decide to further update your logic to use the protocols field to more narrowly limit your /quote requests. An equivalency chart of legacy routingPreference values to protocols values can be found in the Swap Routing Guide. If you already only specify BEST_PRICE and/or FASTEST for your routingPreference, you do not need to make any changes. If you do not specify any value for routingPreference, the default will remain BEST_PRICE and no change in your logic is required.