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Developer documentation

Build with the CoinFat API

Everything you need to accept crypto payments: create invoices, redirect to a hosted checkout, and handle signed webhooks.

Quickstart API reference

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Getting StartedWhat CoinFat is and how to take your first payment.AuthenticationAPI keys, scopes, errors, and request basics.InvoicesCreate, retrieve, and list invoices.Hosted CheckoutRedirect customers to the hosted payment page.Checkout SDKDrop-in @coinfat/checkout widget for your own site.Embedded CheckoutBuild the payment UI in your own product.WebhooksReceive and verify signed invoice events.ReferenceCoins, enums, glossary, and versioning.