# 1auth

> Passkey-based authentication and transaction signing for smart accounts. Build secure, gasless, cross-chain applications without the complexity.

## Introduction

- [Overview](https://docs.1auth.box/introduction)
- [Why Passkey](https://docs.1auth.box/passkey)
- [Self-Custody & Compliance](https://docs.1auth.box/self-custody)
- [Quick Start](https://docs.1auth.box/quickstart): Get started with 1auth in minutes.
- [FAQ](https://docs.1auth.box/faq): Frequently asked questions about 1auth.

## Architecture

- [Architecture](https://docs.1auth.box/architecture)
- [Recovery](https://docs.1auth.box/architecture/recovery): How 1auth accounts are recovered — whether a user loses their passkey or the service goes offline.
- [Lost Passkey](https://docs.1auth.box/architecture/lost-passkey): How users regain access to their account after losing a passkey device.
- [Trustless Recovery](https://docs.1auth.box/architecture/trustless-recovery): How users retain full control of their account even if the 1auth service goes offline.

## Guides

- [Signup & Login](https://docs.1auth.box/guides/signup-login): Add passkey authentication to your app with a single method call.
- [Authentication](https://docs.1auth.box/guides/authentication): Verify user identity with passkey-signed messages.
- [Fee Sponsorship](https://docs.1auth.box/guides/fee-sponsorship): Sponsor gas and bridge fees for your users.
- [Permissions](https://docs.1auth.box/guides/permissions): Delegate permissions with session keys.
- [Checkout](https://docs.1auth.box/guides/checkout): One-click payments with the PayButton component.
- [Crosschain](https://docs.1auth.box/guides/crosschain): Execute transactions on any chain using funds from any chain.
- [Token Requests](https://docs.1auth.box/guides/crosschain/token-requests): Specify what tokens you need instead of what tokens to spend.
- [Swap](https://docs.1auth.box/guides/crosschain/swap): Swap tokens or bridge across chains with a single method.
- [Batch Transactions](https://docs.1auth.box/guides/batch-transactions): Queue multiple transactions and sign them all at once.
- [Deposit](https://docs.1auth.box/guides/deposit): Easy onramp for users to fund their accounts.
- [Onramp](https://docs.1auth.box/guides/onramp): Fiat-to-crypto onramp for your users.
- [Manage Account](https://docs.1auth.box/guides/manage-account): Account management app for 1auth users and developers.
- [Theming](https://docs.1auth.box/guides/theming): Customize the look and feel of 1auth components.

## API Reference

- [Overview](https://docs.1auth.box/sdk): Complete API reference for the 1auth SDK.
- [OneAuthClient](https://docs.1auth.box/sdk/client): Main SDK client for authentication, signing, and intent execution via passkeys.
- [PasskeyWalletClient](https://docs.1auth.box/sdk/wallet-client): viem-compatible wallet client with passkey authentication for batched transactions.
- [Components & Hooks](https://docs.1auth.box/sdk/react): React components and hooks for passkey authentication and batch transactions.
- [PayButton](https://docs.1auth.box/sdk/pay-button): One-click payment button with built-in passkey authentication.
- [signTypedData](https://docs.1auth.box/sdk/sign-typed-data): Sign EIP-712 typed data with human-readable preview and verification.

## RPC Reference

- [Overview](https://docs.1auth.box/rpc)
- [eth_chainId](https://docs.1auth.box/rpc/eth-chainid): Returns the current chain ID as a hex string.
- [eth_accounts](https://docs.1auth.box/rpc/eth-accounts): Returns the list of connected account addresses.
- [eth_requestAccounts](https://docs.1auth.box/rpc/eth-request-accounts): Requests user permission to connect accounts. Opens the auth modal if not connected.
- [eth_sendTransaction](https://docs.1auth.box/rpc/eth-send-transaction): Sends a transaction via the intent system. Returns an intent ID.
- [personal_sign](https://docs.1auth.box/rpc/personal-sign): Signs a message with the connected account using a passkey.
- [eth_sign](https://docs.1auth.box/rpc/eth-sign): Signs arbitrary data with the connected account.
- [eth_signTypedData_v4](https://docs.1auth.box/rpc/eth-sign-typed-data): Signs EIP-712 typed structured data with human-readable preview.
- [wallet_connect](https://docs.1auth.box/rpc/wallet-connect): Connects to the wallet. Alias for eth_requestAccounts.
- [wallet_disconnect](https://docs.1auth.box/rpc/wallet-disconnect): Disconnects the wallet and clears the session.
- [wallet_switchEthereumChain](https://docs.1auth.box/rpc/wallet-switch-ethereum-chain): Switches to a different chain by chain ID.
- [wallet_sendCalls](https://docs.1auth.box/rpc/wallet-send-calls): Sends multiple calls atomically as a single intent. EIP-5792 compatible.
- [wallet_getCallsStatus](https://docs.1auth.box/rpc/wallet-get-calls-status): Gets the status of a previously sent batch of calls.
- [wallet_getCapabilities](https://docs.1auth.box/rpc/wallet-get-capabilities): Returns the capabilities supported by the wallet on each chain.
- [wallet_getAssets](https://docs.1auth.box/rpc/wallet-get-assets): Returns the user's token balances and portfolio across chains.