Webhooks

IIMMPACT supports two types of webhooks to keep your systems in sync with real-time events.

Webhook Types

Feature	Transaction Webhooks	Catalog Webhooks
Purpose	Payment status updates (Processing → Succesful / Failed)	Product catalog changes (products, options, categories, groups)
Triggers	Transaction status changes	Catalog data created, updated, or deleted
Setup	Dashboard: Developer > Webhooks > Settings	Dashboard: Developer > Webhooks > Settings
HTTP Method	POST or GET (your choice)	POST only
Security	IP allowlisting (HMAC planned)	HMAC-SHA256 signature verification
Retry Policy	3 retries, 60s fixed delay	5 retries, exponential backoff
Retry Timeout	30s per request	30s per request
Events	Single event type (status change)	12 event types across 4 resource types

Guides

• Transaction Webhooks — Configure callback URLs for payment status notifications
• Catalog Webhooks — Receive real-time catalog change notifications

API Reference

• Get Callback URL — Retrieve current transaction webhook configuration
• Set Callback URL — Configure transaction webhook URL
• Transaction Webhook Payload — Payload format, IP allowlist, field mapping
• Catalog Webhook Events — Event types, payload schema, signature verification