Webhook Guides

Webhook Infrastructure

Webhook infrastructure is the set of endpoints, queues, routing rules, retry controls, logs, metrics, and operator workflows that keep event delivery reliable after the first successful integration demo.

FastHook packages those pieces into sources, connections, destinations, request records, event records, and delivery attempts so teams can operate provider traffic without rebuilding the same plumbing for every app.

Webhook infrastructure inspection ladder from source request to event and destination attempt.
Reliable infrastructure keeps a trace from provider request to destination attempt, then links recovery actions to the evidence that caused them.

Core infrastructure layers

  • Ingress: source URLs, allowed methods, provider presets, HMAC, API key, and Basic Auth.
  • Routing: connection filters, transformations, branch-local rules, fan-out, and fan-in.
  • Delivery: HTTP, CLI, mock, Google Sheet, and Gmail destinations with auth and rate limits.
  • Recovery: automatic retry, manual retry, request replay, bulk recovery, and pause/resume.
  • Observability: request payloads, response bodies, attempts, metrics, and rejection causes.

What reliable infrastructure must answer

Good webhook infrastructure answers operational questions quickly. Did the provider reach the public URL? Was the request verified or rejected? Which connection matched? Did the destination receive the event? What status and response body came back? Is retry safe, or would it duplicate a business side effect?

FastHook keeps those answers attached to the request, event, and attempt records. That makes incident response less dependent on provider dashboards, scattered receiver logs, or hand-built replay scripts that only one engineer understands.

Production checklist

  1. Create separate sources for production, staging, and local traffic.
  2. Verify provider signatures before queueing accepted requests.
  3. Route each event family through a connection whose rules are easy to inspect.
  4. Use destination rate limits for slow receivers or expensive downstream APIs.
  5. Store idempotency keys before creating external side effects.
  6. Practice retry and replay on a narrow test window before an incident.

Failure modes to design for

  • Provider retry storms: use fast acceptance, source verification, and receiver idempotency.
  • Receiver outages: inspect attempts, pause noisy branches, and retry after the receiver is healthy.
  • Schema drift: keep payload history and transformation rules visible before replaying.
  • Wrong route: debug with path, headers, query params, body fields, and connection rules.
  • Slow downstream API: use destination rate limits and narrow recovery windows.

Infrastructure config example

Connection with retry and deduplication
{
  "name": "billing-events-to-ops",
  "source_id": "src_billing",
  "destination_id": "des_ops_api",
  "rules": [
    {
      "type": "filter",
      "field": "body.type",
      "operator": "starts_with",
      "value": "invoice."
    },
    {
      "type": "retry",
      "strategy": "exponential",
      "count": 5,
      "interval": 60000,
      "response_status_codes": ["429", "500-599"]
    }
  ]
}

Build vs operate

Many teams can build a webhook receiver in a day. Operating it for months is the harder part: retries need backoff, failed events need evidence, sensitive providers need signature checks, receivers need rate limits, and operators need a safe way to replay only the traffic that matters. Treat webhook infrastructure as a control plane, not just a route handler.

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