Hooks sends events to external systems—webhooks to third-party APIs, integrations with SaaS platforms, notifications to partners. It handles delivery, retries, failures, and tracking.
Hooks manages outbound webhook delivery with configurable retry policies, failure handling, signature verification, and delivery logs. It supports fan-out to multiple endpoints, conditional delivery rules, and payload transformation. Events can be triggered by API calls, streams, or worker jobs—ensuring external systems stay synchronized with your application state.
How teams use Hooks to build better systems
Send events to external systems with guaranteed delivery and retry logic
Trigger workflows in external platforms like Slack, Stripe, or Zapier
Notify payment providers of transaction events with reliable delivery
Keep partner systems in sync with your data through webhook notifications
Send system events to external monitoring and alerting services
Replicate data to external systems by pushing change events via webhooks
Enterprise-grade outbound event delivery with guaranteed reliability
Get started with Hooks using our official SDKs
import { Fourbyfour } from '@fourbyfour/sdk';
const client = new Fourbyfour({
apiKey: 'your-api-key',
projectId: 'your-project-id'
});
// Register a webhook endpoint
const endpoint = await client.hooks.createEndpoint({
url: 'https://api.partner.com/webhook',
events: ['order.placed', 'order.shipped']
});
// Send a webhook
const { deliveryId } = await client.hooks.send({
eventType: 'order.placed',
payload: { orderId: '123', total: 99.99 }
});
// Check delivery status
const delivery = await client.hooks.getDelivery(deliveryId);Install the SDK: npm install @fourbyfour/sdk
Understanding Hooks's workflow
Events are triggered from your application, streams, or worker jobs. Hooks queues them for delivery with endpoint routing based on event types and filters.
Payloads are transformed using templates and validation rules. Hooks generates HMAC signatures for security and adds metadata like timestamps and delivery IDs.
Webhooks are sent via HTTP POST to registered endpoints. Hooks tracks response codes, latency, and errors. Success requires 2xx status codes within timeout limits.
Failed deliveries trigger exponential backoff retries with jitter. After max attempts, events are moved to dead letter queues for manual intervention or alerting.
Add Hooks to your project and integrate with external systems