What is webhook infrastructure?

Webhook infrastructure is the set of systems that send and receive webhooks reliably at scale. It covers the work that surrounds an HTTP POST: queueing deliveries, signing and verifying requests, retrying failures, isolating broken endpoints, and logging every attempt so you can debug what happened.

Sending webhooks?

Svix is the enterprise-ready webhook sending service. It handles signing, retries, and delivery observability, so you can ship a reliable webhook platform in minutes instead of months. Start sending webhooks with Svix.

Webhook infrastructure components

Webhook infrastructure has five components: a queue that decouples event creation from delivery, signing and verification that authenticate every request, a retry scheduler with a dead-letter queue behind it, rate limiting on both ends, and a delivery log you can search and replay from. A system missing any one of them loses events silently under load.

• Queueing. Events are enqueued rather than sent inline, so a slow or unreachable endpoint never blocks the application that generated the event. It also keeps the sender inside the few-second timeout receivers expect.
• Signing and verification. Each delivery carries a webhook signature: under the Standard Webhooks specification, an HMAC-SHA256 over the message ID, the timestamp, and the body, sent in a webhook-signature header alongside webhook-id and webhook-timestamp. Receivers verify it and reject requests whose timestamp falls outside a tolerance window, commonly five minutes, which is what blocks replay attacks.
• Retries. Failed deliveries are retried with exponential backoff following a retry policy, commonly around eight attempts spread over roughly 24 hours, and deliveries that keep failing land in a dead-letter queue instead of disappearing.
• Rate limiting. A rate limit protects both sender and receiver from bursts that would otherwise overwhelm a downstream service.
• Monitoring. Delivery logs, status, and alerts give you one place to see failures and replay them, which is the core of any webhook monitoring setup.

Bundle these concerns into one layer and you get a webhook gateway. Spread them across a full sending and receiving platform and you get a managed webhook service.

Sending versus receiving webhooks

The two directions need different things. When you send webhooks, the hard problems are fan-out, per-endpoint retries, and giving your customers visibility into their own deliveries. When you receive webhooks, the work is verifying signatures, absorbing spikes, and processing events idempotently so a retried delivery does not run twice. Most teams underestimate the sending side, because it means operating queues, retry logic, and a status dashboard for every customer endpoint.

Building versus buying

You can build webhook infrastructure on your own stack, typically a queue such as Redis or Kafka behind a worker pool that handles signing, retries, and logging. That path is reasonable when your needs are simple and volume is low. It gets expensive as you add per-endpoint backoff, dead-letter handling, replay, signature rotation, and a portal your customers can inspect, because each of those is a project on its own.

A managed service like Svix provides that whole layer, so you send an event through an API and it handles queueing, signature verification, retries, and delivery logs. If webhooks are a feature of your product rather than your core business, buying the infrastructure usually costs less than staffing it.

Frequently asked questions

Is a webhook gateway the same as webhook infrastructure?

A webhook gateway is one part of it. The gateway centralizes verification, routing, retries, and logging in front of your receivers. Webhook infrastructure is the broader term covering both sending and receiving, including queueing, dead-letter handling, and monitoring end to end.

What do I need to receive webhooks reliably?

Verify the signature on every request, return a fast 2xx and process the event asynchronously, handle deliveries idempotently so retries are safe, and absorb bursts with a queue. Log each request so you can debug and replay failures.

Should I build or buy webhook infrastructure?

Build it when volume is low and requirements are simple. Buy it once you need per-endpoint retries, dead-letter queues, replay, signature rotation, and a customer-facing delivery log, since maintaining those in-house is an ongoing cost rather than a one-time build.