Coinfat

Getting Started

Quickstart

From API key to your first paid invoice in five steps.

Five steps

1

Get an API key

Open your store, go to its Developers tab → API keys, and create one with the invoices:write ability. Copy the secret. It's shown only once.
2

Create an invoice

Call the invoices endpoint from your server:

bash
curl https://api.coinfat.com/api/invoices \
  -H "Authorization: Bearer <API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{ "amount": "49.99", "duration": "1h", "supported_wallets": ["btc"] }'
3

Redirect the customer

Send the customer to the response's checkout_url to pay.
4

Add a webhook endpoint

On your store's Developers tab → Webhooks, add your HTTPS URL, subscribe to invoice.completed, and copy the signing secret.
5

Verify & handle it

Verify the webhook signature, then fulfill the order. You're live.