> ## Documentation Index
> Fetch the complete documentation index at: https://help-center-starter.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Webhooks

> Subscribe to events, verify signatures, and retry safely.

Webhooks push events to your infrastructure so you can react without polling. Reliability hinges on verification, idempotency, and fast HTTP responses—treat the endpoint like a mini product.

## Subscriptions

Create a webhook endpoint and select event types. The platform sends a signing secret for HMAC verification.

### Filtering

Subscribe only to events you handle. Unused events still cost verification CPU and clutter logs.

## Verification

Always validate signatures before processing payloads. Reject stale timestamps when present.

### Clock skew

Allow a small clock skew window between signer and verifier, but bound it to limit replay windows.

## Retries

Failed deliveries retry with exponential backoff. Ensure your endpoint is idempotent.

### Response codes

Return **2xx** only after you have safely persisted or handed off work. Use **5xx** to signal transient failures worth retrying; **4xx** for permanent misconfiguration.