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Stablecoin payment API for custom checkout and billing

Use a stablecoin payment API for custom checkout, ecommerce payments, SaaS billing, invoices, and payment links. Create USDC, USDT, and EURC payment intents with hosted checkout, webhooks, and order status updates.

This page is for merchants and developers building a custom stablecoin payment API integration for checkout, billing, invoices, or payment links. A good stablecoin API is not just a create-payment endpoint. It is a payment state model that helps engineering ship faster and helps merchant teams understand what happened after checkout.

Use payment intents for predictable stablecoin payments

Payment intents keep the stablecoin payment lifecycle predictable. They give the merchant team a durable payment record before the buyer even opens a wallet.

  • Create USDC, USDT, or EURC payment intents server-side.
  • Return a hosted checkout URL or payment approval step to the client.
  • Use webhook delivery to update order, invoice, or subscription state.

Treat payment webhooks as part of the API contract

The operational reliability of a stablecoin payment API comes from state handling. Webhooks are part of the product contract, not an optional integration detail.

  • Verify webhook signatures.
  • Make handlers idempotent.
  • Log the payment status and context your support and finance teams will actually need later.

Design the stablecoin API for developers and operations

A merchant-facing stablecoin API becomes easier to scale when engineering, support, and finance all read from the same payment truth.

  • Store payment, stablecoin, network, amount, and timestamp details.
  • Keep reconciliation fields available to finance.
  • Use one integration path for custom checkout, invoices, subscriptions, and payment links wherever possible.

FAQ

Why use payment intents instead of direct wallet collection?

Payment intents make expiry, duplicate creation, stablecoin options, amount matching, and status transitions much easier to control than ad-hoc wallet collection.

What is the minimum stablecoin payment API integration?

You need a server endpoint to create payment intents, a hosted checkout or wallet step, and webhook handlers that keep your own order, invoice, or subscription state up to date.

What data should merchant systems keep?

Store payment ID, order ID, customer reference, stablecoin, network, amount, status timestamps, and webhook delivery context so support and finance can trace the payment later.

Stablecoin payment API implementation guides

Use these guides to wire payment intents, hosted checkout, webhooks, payment status, and reconciliation into one merchant workflow.