# Core Functionality of the Circle APIs

All of Circle's APIs share core functionality that lets you manage your Circle Account in a programmatic way.

With a Circle Account, your business can deposit traditional money from 50+ countries and seamlessly convert it into ["digital currency dollars": USDC](🔗). You can then use USDC for everyday payments and treasury flows.

All Circle APIs allow you to:

  • Transfer digital currency (USDC) in and out of your account.

  • Register your own business bank accounts.

  • Make transfers to or from your business bank account while seamlessly converting those funds across digital currency and traditional fiat.

  • Set up automated rules for funds flows such as _"if a deposit is received from this bank account, then transfer digital currency to this blockchain address"_.

# Getting Started

Check our [quickstart guide on sending account funds externally](🔗). It will show you how to use our API to transfer funds to other platforms via USDC on-chain transfers.

# Ready for the next step?

After experimenting with our APIs, you’ll want to start building test integrations in sandbox prior to moving into production. Start by [applying for a Circle Account](🔗). We'll be happy to walk you through the next steps.