Sending a cryptocurrency reward manually is easy. Building software that can send thousands of tiny rewards without paying users twice, leaking an API key, losing track of failed payments, or draining your balance because somebody discovered an exploitable endpoint is a much more interesting problem.

FaucetPay is particularly useful for this type of application because it is designed around small cryptocurrency payouts. Its current API v2 provides scoped API keys, REST endpoints for balances and payouts, automatic payout sending, idempotency protection, per-key payout caps, and signed webhooks.

In this tutorial, we will build the core of a real automatic payout system using:

• Node.js
• Express
• PostgreSQL
• FaucetPay API v2
• a background payout…