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

# Onboarding & deposits

> What you need to start trading on Arcus, how deposits work through the Fun flow, and how funds settle as USDG

To trade on Arcus you need a supported wallet, funds in it, and eligibility in your region. New users can create a wallet with email or social sign-in; existing wallets connect directly. Funds are deposited through an in-app flow powered by [Fun](https://fun.xyz) and settle to your Arcus account as **USDG**, the protocol's settlement stablecoin.

<Note>
  This page covers the concepts. The deposit and withdrawal flows themselves are part of the app experience; the cross-chain routing described here is handled for you.
</Note>

## What you need to start

* A **supported wallet** — created in-app via email or social sign-in, or connected from an existing self-custody wallet.
* **Funds** to trade with (these arrive as USDG; see below).
* **Eligibility** in your region.

## Collateral: USDG

Arcus settles in **USDG**, a regulated stablecoin issued by Paxos under the Global Dollar Network, redeemable 1:1 for USD and backed by cash and US Treasuries. Whatever you deposit is converted to USDG and credited to your Arcus account. Multi-asset collateral (such as BTC and ETH) is on the roadmap.

## Depositing through Fun

Deposits run through the [Fun](https://fun.xyz) flow. You first choose whether the funds land in **USDG (Perps)** or **USDG (Spot)**, then pick a route:

| Route                   | How it works                                                                                                                                                           |
| ----------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Transfer crypto**     | Send crypto from a self-custody wallet on any major chain (Bitcoin, Ethereum, Solana, Base, Arbitrum, and others). It converts to USDG on arrival — typically instant. |
| **Connect an exchange** | Pull funds directly from a centralized-exchange balance (Coinbase at launch, more coming).                                                                             |
| **Use cash**            | Pay with Apple Pay, card, Google Pay, or AstroPay. A processing fee applies and is shown before you confirm.                                                           |

Behind a single deposit address, Fun automatically swaps and bridges your deposit to USDG and delivers it to your Arcus account in **one atomic (all-or-nothing) flow**, routing through established non-custodial bridges (such as Circle CCTP, Relay, Across, and LayerZero) selected by asset, route, and size.

The route, fees, and estimated time are always shown before you confirm. **Arcus charges no deposit fee of its own**, and USDG deposits and withdrawals carry zero fees; any third-party processing or conversion cost is displayed upfront.

<Note>
  Fun is a third-party onboarding provider. For the full list of supported chains, payment methods, limits, and fees, see [fun.xyz](https://fun.xyz) and the [Fun help guide](https://intercom.help/funxyz/en/collections/9212192-fun-xyz-s-help-guide).
</Note>

## Next steps

<CardGroup cols={2}>
  <Card title="Perpetuals overview" icon="chart-line" href="/concepts/perpetuals/overview">
    What you can trade and how 24/7 perps work.
  </Card>

  <Card title="Authentication" icon="key" href="/api-reference/authentication">
    Generate an API key and start trading programmatically.
  </Card>
</CardGroup>