---
title: Safe retries and rate limits
description: Make event delivery retry-safe and respect credential rate limits.
sidebar:
  order: 5
---

Use a stable idempotency key for one real-world occurrence. The same key and
body replay the original response for 24 hours; the same key with another body
returns `409 Conflict`. Keys are scoped to the API key that sent them.

```typescript
const result = await client.events.create(
  { channelName: 'deployments', title: 'Production deployed' },
  { idempotencyKey: 'deploy-01JABC' },
);

console.log(result.wasReplayed);
```

Each API key can make up to 100 requests in a 60-second window, which starts
again 60 seconds after the key's last accepted request. The SDK exposes the
response's rate-limit values on `result.rateLimit` and remembers the last
values it saw on `client.rateLimit`.