Multi-chain by default
Support popular networks and add new ones behind the scenes, without refactoring your checkout.
Payment gateway for Web3 merchants
Web3 payments that feel like Web2.
Accept crypto in minutes with a single integration. Route payments across chains, reduce failed transactions, and settle in stablecoins or fiat via your off-ramp.
Trusted by builders
Game studios
Marketplaces
SaaS
Exchanges
99.99%
uptime-ready architecture
1 API
multiple chains & rails
< 15m
to first test payment
Checkout preview
K
Kunog Demo Store
Order #KNG-2048
Total
$49.00
Select a payment method to see the flow.
Integrate in your app
Demo only — no real transactions.
Smart routing
Pick the best chain, fee tier, and confirmation strategy per payment.
Risk controls
Velocity limits, allow/deny lists, and webhook signatures.
One integration. Many rails.
A payment layer that unifies on-chain and off-chain settlement without making your product feel “crypto.”
Stablecoin settlement
Collect in any supported asset, settle in USDC/USDT, and simplify treasury & accounting.
Security first
Signed webhooks, idempotency keys, least-privilege API keys, and audit-friendly logs.
Developer experience
Clean docs, sandbox mode, SDK-ready patterns, and examples that match your stack.
Fewer failed payments
Dynamic fee buffers and confirmation strategies that balance speed and safety.
Instant callbacks
Webhooks for payment_intent.created, pending, confirmed, and refunded events.
How it works
A familiar flow: create intent → collect → confirm → settle.
-
1
Create a Payment Intent
Define amount, currency, and customer metadata. Kunog returns a hosted checkout URL or client secret.
-
2
Collect on-chain
Customers pay with supported tokens. Kunog monitors confirmations and manages retries safely.
-
3
Settle the way you want
Settle to stablecoins, or export payouts to your off-ramp/bank via reconciliation files.
POST
/v1/payment_intents
curl https://api.kunog.com/v1/payment_intents \
-H "Authorization: Bearer kng_test_••••" \
-H "Content-Type: application/json" \
-d '{
"amount": 4900,
"currency": "USD",
"settlement": "USDC",
"metadata": {
"order_id": "KNG-2048",
"customer_id": "cus_8f1a"
}
}'
Get a checkout URL and listen for webhooks to confirm payment.
Built for production from day one
Clean primitives that scale: idempotency, retries, observability, and a permission model that fits teams.
✓ Test & live keys with scoped permissions
✓ Webhook signatures and replay protection
✓ Payout schedules and reconciliation exports
✓ Rate limits and anti-abuse controls
Multi-rail
On-chain + off-chain
Route payments based on speed, fees, and risk.
Observability
Traceable events
Every transition emits a webhook and is queryable.
Ops-friendly
Replay & recover
Idempotent APIs and safe retries by design.
Checkout
Hosted or embedded
Use our UI, or bring your own.
Frequently asked questions
Short answers now; extend these with your real policies later.
In a typical gateway model, customer payments are routed to merchant-controlled addresses and tracked via intents. Confirm your real custody model and licensing needs with counsel before launch.
Kunog can treat a payment as pending immediately, then confirmed after a configurable number of confirmations. Faster chains can confirm in seconds; Bitcoin can take longer.
Yes — you can accept multiple assets and settle to a single treasury currency (e.g. USDC) for simpler accounting.
Refunds are supported as merchant-initiated payouts (subject to your on-chain liquidity and risk rules). You’ll want clear refund terms in your merchant policy.