> ## Documentation Index
> Fetch the complete documentation index at: https://docs.avok.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# What is Avok?

> A client-side SDK for self-custodial smart wallets authenticated by passkeys, on EVM and Solana.

Avok is an open-source, client-side SDK that gives any app a **self-custodial smart wallet**
authenticated by **passkeys**. There is no seed phrase and no browser extension. Everything
happens in the app.

* **EVM** wallets are smart EOAs through [EIP-7702](https://eips.ethereum.org/EIPS/eip-7702).
* **Solana** is a first-class second rail.

The same wallet is first-class both in its own wallet app and embedded in a third-party app.

## The passkey is the wallet

Avok derives the wallet key from the passkey itself:

```
K = HKDF(PRF(credential, rpId))
```

The key is derived for each signing gesture and wiped immediately after. It is never stored.
Because `rpId` scopes the passkey's PRF, it is effectively an input to the key: change the
`rpId` and every user gets a different wallet. For the full derivation, see
[The passkey is the wallet](/concepts/passkey-is-the-wallet).

## Two signing paths

The passkey's WebAuthn `rpId` decides how signing happens:

* **Own-origin**: the passkey's `rpId` is the app's own origin, so signing runs in-app, in
  code. Set `rpId`.
* **Shared-origin**: the passkey lives under a different origin, so signing happens in a popup
  (web) or an in-app browser tab (React Native) opened to that origin. Set `authOrigin`.

`rpId` and `authOrigin` are mutually exclusive; they select the path. See
[Signing paths](/concepts/signing-paths).

## Bring your own infrastructure

Avok ships **no default** RPC, bundler, paymaster, or Kora endpoint. Each is a trust boundary
you choose. You supply the URLs you trust; the SDK never picks one for you. See
[Trust and defaults](/concepts/trust-and-defaults).

## What you'll build

In the next few pages you install Avok, create an own-origin wallet on the web, and send a
transaction through the wallet's standard provider. Start with [Install](/get-started/install).