Silent Swap is a private trading protocol for buying and selling ERC20. It supports x402/MPP standards for private agentic payments and swaps.
Silent Swap is a private trading protocol that lets you execute onchain trades without broadcasting your intentions. When you swap tokens publicly, bots and other traders can see your moves in real time, front-running your exits, copying your positions, or tanking the price before you're done. Silent Swap solves this by routing trades through a private pool where your order stays hidden while it executes, and nobody knows what you're doing until it's already settled.
How it works: Traders deposit tokens into a shared private pool. Inside, order details and trading wallets are obfuscated so nobody outside can see who's sending what or where. Trades are routed through Uniswap or other onchain venues for optimal execution. When the trade completes, proceeds return cleanly to your account. Traders can then withdraw tokens to a fresh wallet or sell at a later stage. This is especially useful for scaling out of positions without causing market panic, which is particularly true when trading small cap coins.
The cryptography: Privacy is enforced by zero-knowledge proofs, which let the protocol confirm a trade is valid without revealing any details about it. Proofs are built locally in browser via WASM and then verified by Solidity contracts on-chain. A relayer handles gas on the user's behalf.
AI: In addition to the user-facing UI shown in the demo, we built an SDK that supports the Coinbase x402 standard and Tempo's MPP, enabling private agentic payments and swaps.