For Arc builders · free, no API key

Give your new users their first gas on Arc

On Arc, USDC is the gas. A brand-new wallet holds none, so it cannot send a single transaction in your app. Add one line of HTML and your users get 0.01 USDC on Arc mainnet from our faucet, free. They only sign a message: no transaction, no fee, nothing to install.

Try it

Add it to your app

<div data-apex-arc-gas></div>
<script src="https://apexfaucet.xyz/arc/gas-widget.js" async></script>

Options on the div: data-theme="light" or "dark" (by default it follows the visitor's colour scheme), and data-address="0x..." to claim for a known address (that wallet still signs).

How it works

The button asks the visitor's wallet for its address and signs today's challenge (EIP-191). That proves the visitor holds the key, and it costs nothing.
Our server checks the signature and the limits, then calls our faucet contract on Arc mainnet, 0x53fb2e89834050afaa9b3090a1fc9d1064615805. The contract has no withdraw function: money leaves it only as claims.
The USDC arrives in about a second. The button shows the transaction.

Limits, stated plainly

0.01 USDC per claim. One claim per address every 8 hours, and one per connection every 8 hours.
A daily cap, released in three parts across the day so every time zone gets a turn. When today's share is used, the button says when the next one opens.
The faucet pays out what is in its pot and promises nothing beyond it. Live totals: GET https://apexfaucet.xyz/api/arc/faucet.
Free, no API key, no sign-up. We count claims per website by the browser's Origin header (host name only), so we can see which apps use the button.

Agents without a browser use the same faucet directly: GET /api/arc/faucet/challenge/<address>, sign the message, then POST /api/arc/claim {address, signature}. The widget source is readable at /arc/gas-widget.js.