The evidence strongly supports the statement that Coinbase has enabled a feature for its retail users to directly trade tokens on Solana-based DEXs, specifically through its self-custody product, the Coinbase Wallet.The most direct and compelling piece of evidence comes from 0xProject, the DEX infrastructure provider. Their official social media account, a highly authoritative primary source, explicitly states that its 'Solana Swap API' is the 'invisible engine' powering trading within the Coinbase Wallet. This directly confirms the existence of a feature that allows users of a Coinbase retail product (the Wallet) to execute swaps, which are inherently trades on decentralized exchanges, on the Solana network.Other sources introduce related but distinct functionalities that do not contradict the primary claim. The announcements from Base and The Block describe a bridge that allows users to move Solana tokens to the Base network and trade them on a DEX there. While this is a method for trading Solana-origin assets within the Coinbase ecosystem, it is different from trading *directly on Solana*. Similarly, the Coinbase price pages for tokens like ORCA, ACS, and DRIFT confirm that these Solana-based tokens are listed for trading on Coinbase's centralized exchange (CEX). This is also a separate feature and does not negate the existence of direct DEX trading capabilities in the Wallet.In summary, the primary evidence from the technology partner (0xProject) directly confirms the feature exists in the Coinbase Wallet. The other sources describe alternative ways to interact with Solana-based assets via Coinbase's CEX or its Layer 2 network, Base, but do not invalidate the core statement.