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Welcome to sw4p

sw4p enables gasless cross-chain transfers across any blockchain. Users sign permits or transactions with their wallet, and sw4p handles all bridging infrastructure.

Quick Start

Get started in under 5 minutes

TypeScript SDK

npm install @sw4p/bridge

Rust SDK

cargo add sw4p-bridge

API Reference

REST API documentation

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Vision

Support every blockchain, every stablecoin, and every native token. Current MVP supports:
  • EVM Chains: Ethereum, Base, Arbitrum, Polygon
  • Non-EVM: Solana
  • Tokens: USDC (more coming soon)

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Key Features

Users don’t need native tokens for gas. sw4p sponsors gas costs through permit-based approvals.
SDKs never handle private keys. All signing happens in the user’s wallet.
Transfers complete in approximately 60 seconds across all supported routes.
Know the exact cost before confirming. Fee estimates include all gas and bridge costs.

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How It Works