Introduction

Accept crypto payments, send payouts, and issue refunds through one API.

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CoinCircuit is crypto payment infrastructure. Accept payments online, in person, and from AI agents. Bill with invoices, send payouts, and issue refunds.

What you can build

• Online payments. Create a payment and redirect to a hosted checkout, or build your own UI on the API.
• In-store payments. Share a payment page link or QR code, or take payments on a POS terminal at the counter.
• Invoices. Send itemized invoices your customers pay in crypto.
• Agentic payments (x402). Let AI agents and automated clients pay for your API per request, settled in stablecoins with gas covered.
• Payouts. Withdraw your balance to a bank account or a crypto wallet.
• Refunds. Refund a payment or an invoice, in full or in part.
• Deposit accounts. Give each customer a reusable address to receive funds into their balance.
• Webhooks. Get a signed event the moment a payment, payout, or refund changes state.

Base URLs

• Production: https://api.coincircuit.io
• Sandbox: https://sandbox-api.coincircuit.io

Start here

Follow the Quick Start to take your first payment in a few minutes. To test without real funds first, set up the Sandbox.