# Arc API FAQ

> Frequently asked questions about the Arc API

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

## What is Arc?
Arc is an open Layer 1 blockchain by Circle, purpose-built for stablecoin finance, featuring USDC as the native gas token, sub-second finality, and direct integration with Circle's platform for secure access to liquidity and developer tooling.

## How do I get started with Arc?
Check out our [Arc API Quickstart guide](/docs/reference/arc-api-quickstart) to get started building on Arc.

## What is the Arc API?
The Arc API allows you to interface with the Arc network. With this API, you can execute transactions, query onchain data, and interact with the Arc network, relying on a JSON-RPC standard.

## Is Arc EVM compatible?
Yes, Arc is EVM compatible.

## What API does Arc use?
Arc uses the JSON-RPC API standard. This API is crucial for any blockchain interaction on the Arc network, allowing you to read block/transaction data, query chain information, execute smart contracts, and store data onchain.

## What methods are supported on Arc?
Arc supports standard Ethereum JSON-RPC methods. Some chain-specific methods may vary. Please check the Arc API endpoints documentation for a complete list.

## What is a Arc API key?
When accessing the Arc network via a node provider like Alchemy, you use an API key to send transactions and retrieve data from the network. For the best development experience, we recommend that you [sign up for a free API key](https://dashboard.alchemy.com/signup).

## Which libraries support Arc?
Common Ethereum libraries like [ethers.js](https://docs.ethers.org/v5/) should be compatible with Arc, given its EVM nature.

## My question isn’t here, where can I get help?
If you have any questions or feedback, contact us at support@alchemy.com or open a ticket in the Alchemy Dashboard.