Send Tokens
Without Gas Fees
Experience the smoothest way to send assets across chains. Pay only a tiny relayer fee in the token you send. No ETH or native tokens required.
Why Choose Gasless Transfers?
True gasless payments via ERC-4337 account abstraction and Aptos sponsored transactions — no ETH, no APT, no friction.
Zero Gas Fees
Send USDC & USDT without needing ETH or AVAX for gas. Our ERC-4337 paymaster relayer covers all transaction costs on your behalf.
Secure Signatures
Uses EIP-712 typed signatures and ERC-2612 permit functions for maximum security. Non-custodial — your keys stay with you.
Low Fees
Pay only a 0.25% relayer fee deducted from the amount you send. No native gas token required — far cheaper than manual gas management.
Instant Transactions
Fast execution on Base, Arbitrum & Avalanche via ERC-4337 account abstraction, and Aptos via native sponsored transactions.
Developer-Friendly
Integrate gasless transfers in minutes with the @smoothsend/sdk. Full TypeScript support, React wallet adapter, and comprehensive docs.
Multi-Chain Support
One SDK, four chains: Aptos, Avalanche C-Chain, Base (Coinbase L2), and Arbitrum One. Mainnet & testnet supported.
How Gasless Transfers Work
SmoothSend uses ERC-4337 account abstraction on EVM chains and Aptos native sponsored transactions to eliminate gas entirely for end users.
Connect & Sign
Connect your wallet and sign two secure messages: an ERC-2612 USDC permit and a transfer authorization. No gas needed.
Paymaster Executes
The SmoothSend paymaster relayer submits your transaction on-chain, sponsoring all gas fees from its own balance.
Transfer Complete
Funds arrive instantly. A 0.25% relayer fee is deducted from your sent amount — no ETH or APT ever required.
The Future of Crypto Transfers
Send USDC & USDT without needing ETH or AVAX. SmoothSend's ERC-4337 paymaster and Aptos sponsored transactions handle the gas — users pay a tiny fee in the stablecoin they're already sending.
Why Gasless Transfers Matter
Accessibility:Users don't need to hold ETH, AVAX, or APT just to send USDC
Cost Efficiency: Pay only the transfer amount plus a predictable 0.25% fee
Better UX: Simplified workflow for your dApp users — just sign, transfer done
Non-Custodial: Maintain full control with cryptographic signatures — we never hold funds
How It Works Technically
ERC-4337 Account Abstraction: Industry-standard UserOperation flow — no custom wallet needed
ERC-2612 Permit: Token allowance granted via signature — no on-chain approval transaction required
Paymaster Relayer:SmoothSend's infrastructure submits the UserOperation and pays gas costs
Instant Settlement: Transaction confirmed on-chain in 2-5 seconds across all supported chains