# Rate limits

Requests to the Increase API are rate limited per group. In production the default limit is **100 requests per second**. In [sandbox](/documentation/sandbox) the default limit is **20 requests per second**. You can briefly burst above the per-second rate as long as your average stays within it.

If you expect sustained traffic above the default, reach out to us and we can raise your limit.

## Being rate limited

When you exceed your quota, the API responds with a `429` status code and an error of type `rate_limited_error`:

```json
{
  "type": "rate_limited_error",
  "status": 429,
  "title": "You've tried to take this action too many times in too short a window. Please wait a while and try again.",
  "detail": null,
  "retry_after": 30
}
```

The response includes a `retry_after` field with the number of seconds to wait before retrying. The same value is returned in the standard `Retry-After` response header.

To stay within your limit, spread requests out over time rather than sending them in large bursts. When you do receive a `429`, wait for the duration indicated by the `Retry-After` header before retrying, and consider adding exponential backoff to your retry logic. Our [SDKs](/documentation/software-development-kits) automatically retry rate limited requests after the instructed delay.