Installation

Install @slicekit/erc8128 — the official ERC-8128 implementation for signing HTTP requests with Ethereum accounts.

Install

Add the package using your preferred package manager:

bun add @slicekit/erc8128

Requirements

• Bun 1.0+ (recommended), Node.js 18+, or modern browser with Web Crypto API
• TypeScript 5.0+ (recommended, but not required)

Exports

Everything is available from the main entry point — client functions, server functions, utilities, types, and error classes.

import {
  // Client
  createSignerClient,
  signRequest,
  signedFetch,
  
  // Server
  createVerifierClient,
  verifyRequest,
  
  // Utilities
  formatKeyId,
  parseKeyId,
  
  // Types
  type EthHttpSigner,
  type SignOptions,
  type VerifyPolicy,
  type VerifyResult,
  type NonceStore,
  type VerifyMessageFn,
  
  // Errors
  Erc8128Error,
} from '@slicekit/erc8128'

TypeScript

@slicekit/erc8128 is written in TypeScript and ships with full type definitions. No additional @types/* packages needed.

Types are exported directly from the main entry point:

import type {
  EthHttpSigner,
  SignOptions,
  VerifyPolicy,
  VerifyResult,
} from '@slicekit/erc8128'

Ethereum Signing

For producing Ethereum signatures, any library or wallet that supports personal_sign (EIP-191) will work. The examples in this documentation use viem.

Next Steps

• Quick Start — Sign your first request in 5 minutes
• Concepts — Understand the security model