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Merchant API
Developer documentationOverview

KINGPAY / DEVELOPERS

Your first payment
starts here.

Choose your integration, create a payment, and keep your business in sync with signed webhooks.

Merchant API

Hosted checkout, deposits and subscriptions, connected to your KingPay project.

Start with a checkout link →

Core API

Create forwarding addresses and build your own payment experience directly.

Create a payment address →

BUILT FOR YOUR AI ASSISTANT

One file. The integration context.

Give your coding assistant the complete Merchant API guide: requests, payment states, signature verification, examples and current limitations.

Open guide Download

From integration to payment

  1. 01

    Create your payment

    Use the Merchant API for a hosted payment link, or the Core API for a payment address.

  2. 02

    Connect your webhook

    Set your callback URL, verify signatures and acknowledge deliveries.

    Signature verification →
  3. 03

    Track the lifecycle

    Accept the incoming payment at confirmed. Track distribution at completed. Credit each incoming transaction only once.

    Payment events and confirmations →

Find what you need

Accept deposits Create subscriptions Estimate network fees Inspect payment logs