Custom Webhook Per Transaction

Set webhookUrl for a callback endpoint on one transaction.

This value overrides the dashboard webhook URL for that transaction only.

{
  "amount": 50000,
  "currency": "NGN",
  "email": "[e-mail]",
  "webhookUrl": "https://webhook.site/"
}

Without a custom webhookUrl, Startbutton uses the dashboard webhook URL.

See Accept Payments — Overview and Overview & Verification.