# ERC-8128

> Signed HTTP Requests with Ethereum

## Docs

- [Specification](/specification): ERC-8128 defines how Ethereum accounts sign HTTP requests using RFC 9421 (HTTP Message Signatures).
- [Signing Requests](/guides/signing-requests): Learn how to sign HTTP requests with ERC-8128.
- [Smart Contract Accounts](/guides/smart-contract-accounts): How to use ERC-8128 with smart contract accounts (SCAs) like ERC-4337 wallets and Safe.
- [Verifying Requests](/guides/verifying-requests): Learn how to verify ERC-8128 signed requests on your server.
- [Installation](/getting-started/installation): Install `@slicekit/erc8128` — the official ERC-8128 implementation for signing HTTP requests with Ethereum accounts.
- [Quick Start](/getting-started/quick-start): Learn to sign and verify HTTP requests with ERC-8128 in 5 minutes.
- [Concepts Overview](/concepts/overview): ERC-8128 combines three technologies to create a secure HTTP authentication system:
- [Replay Protection](/concepts/replay-protection): Replay attacks occur when an attacker captures a valid signed request and resends it. ERC-8128 provides multiple layers of defense.
- [Request Binding](/concepts/request-binding): Request binding determines which parts of the HTTP request are cryptographically protected by the signature.
- [Security Model](/concepts/security-model): Understanding the security guarantees and limitations of ERC-8128.
- [Configuration](/cli/configuration): Set defaults in a `.erc8128rc.json` file to avoid repeating options on every command.
- [Examples](/cli/examples): Common usage patterns for the ERC-8128 CLI.
- [CLI](/cli): `@slicekit/erc8128-cli` is a command-line tool for signing HTTP requests with ERC-8128 — think of it as `curl` with built-in Ethereum authentication.
- [Signature Options](/cli/signature-options): Configure how ERC-8128 signatures are generated.
- [Wallet Options](/cli/wallet-options): The CLI supports multiple ways to provide an Ethereum wallet for signing requests.
- [createSignerClient](/api/createSignerClient): Create a client with a bound signer for convenient repeated use.
- [createVerifierClient](/api/createVerifierClient): Create a client with bound verification dependencies for convenient repeated use.
- [formatKeyId](/api/formatKeyId): Format a chain ID and address into an ERC-8128 keyid.
- [parseKeyId](/api/parseKeyId): Parse an ERC-8128 keyid into chain ID and address.
- [signRequest](/api/signRequest): Signs an HTTP Request and returns a new Request with [RFC 9421](https://www.rfc-editor.org/rfc/rfc9421.html) signature headers.
- [signedFetch](/api/signedFetch): Signs and sends an HTTP request in one call.
- [Types](/api/types): Glossary of types in `@slicekit/erc8128`.
- [verifyRequest](/api/verifyRequest): Verify an ERC-8128 signed HTTP request.