Start playing 
in our sandbox

We’re combining the USD Coin (USDC) stablecoin, banking connectivity and wallet infrastructure in powerful APIs, so developers are freed to build what’s next for payments, finance and commerce.
Get an API key
Ready for a production key?

Get in touch with Circle


api documentation portal

Find guides and reference documentation to help you integrate with Circle APIs.

Introducing Circle APIs

Bring the benefits of scalable stablecoin wallet infrastructure and global on- and off-ramps into an emerging global public payment and e-commerce ecosystem built on blockchains.

Payments API

Go global and increase customer reach by accepting card payments that settle in your USDC wallet. Send payouts to bank accounts around the world using your USDC balance.

Focus on your user experience with:

80+ countries supported
USDC to local currency conversion through your Circle Business Account
No need for your business to have a bank account to use our APIs
No extra KYC hurdles for your customers
icon_api-payments copy (1)

Wallets API

We abstract all stablecoin gas and transaction fees, wallet address generation, liquidity management and security of assets so you can focus on innovating.

Go Global & Scale With:

Global wallet support in 150+ countries
Wallet balance and transaction history
Monitoring and notifications of activities within your wallet
Sub wallet creation for multiple user types and flows
icon_api-payments copy

Marketplaces API

The full building blocks for innovative platform companies. Support for flexible business models & funds flows to launch your marketplace faster and scale from day one on an open ecosystem.


Payments and payouts support across platform participants
Sub wallets account creation under a master marketplace owner allows for complex money movement
Reporting and transaction endpoints for any workflow