KryardGasless transactions, in a few lines.

A Turnkey-wire-compatible signer and a managed EIP-7702 relay. Users can even pay gas in any token — through a thin SDK. Live on Sepolia.

Quickstart

Introduction

View on npm

Managed EIP-7702 relay

A user signs a 7702 authorization + batch digest; Kryard signs, fronts gas, and broadcasts the type-4 transaction. Smart-wallet UX with no 4337 bundler.

Pay gas in any token

Users settle gas in any ERC-20. The on-chain KryardDelegate reimburses the relayer an exact, user-signed fee that can't be inflated.

Turnkey-wire-compatible

A drop-in replacement for Turnkey's secp256k1 EVM signing — cutover is a single TURNKEY_BASE_URL swap, zero client changes.

x402 payments

An x402 facilitator for HTTP 402 — verify and settle EIP-3009 stablecoin payments. Buyers pay in USDC with no ETH; Kryard fronts the gas. Base Sepolia preview.

Thin, dependency-light SDK

@kryard/sdk — signAuthorization → sponsored execute. Built-in MIT X-Stamp signer, viem peer dep, on npm + GitHub Packages.

Get going

Quickstart — install the SDK and sponsor your first gasless batch.
Pay gas in any token — let users settle gas in an ERC-20.
Custom delegate — bring your own 7702 delegate via sponsorCall.
x402 payments — charge per API call over HTTP 402; buyers pay in USDC without holding ETH.
Signing API — create multi-curve keys, sign, and HPKE-export — Turnkey-wire-compatible.
Relay API routes — the raw, X-Stamp-authed relay endpoints.