For developers
One call in. One webhook back.
Your team shouldn't need to learn anything about how the money moves. Request a payment, listen for the confirmation, get on with your roadmap.
1 · Request a payment
POST /v1/payments
Content-Type: application/json
x-api-key: <your key>
{
"amount": 500,
"clientId": "trader_8412",
"memo": "Deposit"
}2 · Get a link back
{
"success": true,
"paymentUrl": "https://pay.flowwpay.com/pay/fp_9xQ2",
"reference": "fp_9xQ2",
"expiresAt": "2026-07-27T12:30:00Z"
}3 · We tell you when it's paid
POST https://your-app.com/hooks/flowwpay
X-FlowwPay-Event: payment.completed
X-FlowwPay-Signature: sha256=...
{
"event": "payment.completed",
"data": {
"reference": "fp_9xQ2",
"clientId": "trader_8412",
"amount": 500,
"amountUsd": 500,
"status": "completed"
}
}Details that matter
Built by people who've been on call.
Two integration styles
Redirect to our hosted page, or drop in a script tag and open it as a modal over your own interface.
Signed webhooks
HMAC-SHA256 on every delivery, with retries and a full delivery log you can inspect.
Test environment
A separate environment with simulated payments so you can build without moving real money.
Idempotency
Every create call takes an idempotency key. Retries never double-charge.
Stable payloads
Additive changes only. We don't rename fields under you.
Support that codes
Talk to the people who built it, not a ticket queue.
Want the full reference?
We share complete API documentation and test credentials once we've had a short call about what you're building.