> ## Documentation Index
> Fetch the complete documentation index at: https://inbound.new/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Rate Limits

> Understand rate limits and how to increase them for the Inbound API

The response headers describe your current rate limit following every request in conformance with the [sixth IETF standard draft](https://datatracker.ietf.org/doc/html/draft-ietf-httpapi-ratelimit-headers-06):

| Header name           | Description                                                         |
| --------------------- | ------------------------------------------------------------------- |
| `ratelimit-limit`     | Maximum number of requests allowed within a window.                 |
| `ratelimit-remaining` | How many requests you have left within the current window.          |
| `ratelimit-reset`     | How many seconds until the limits are reset.                        |
| `retry-after`         | How many seconds you should wait before making a follow-up request. |

## Default Rate Limits

The default maximum rate limit is **10 requests per second** across all API endpoints. This applies uniformly to:

* **Email sending endpoints**: 10 requests per second
* **Email management endpoints**: 10 requests per second
* **Domain/configuration endpoints**: 10 requests per second
* **All other API endpoints**: 10 requests per second

This number can be increased for trusted senders upon request.

## Rate Limit Response

After exceeding the rate limit, you'll receive a `429 Too Many Requests` response error code:

```json theme={null}
{
  "error": "Rate limit exceeded",
  "message": "Maximum 10 requests per second allowed. Upgrade or contact support for higher limits."
}
```

## Increasing Rate Limits

If you have specific requirements that exceed the default limits, you can request a rate increase:

<Steps>
  <Step title="Contact Support">
    Reach out to our support team at [support@inbound.new](mailto:support@inbound.new) with your requirements.
  </Step>

  <Step title="Provide Use Case Details">
    Include details about your use case, expected volume, and business requirements.
  </Step>

  <Step title="Review and Approval">
    Our team will review your request and work with you to find an appropriate solution.
  </Step>
</Steps>

## Rate Limit by Endpoint

<Warning>
  Rate limits are applied per account. If you're using multiple accounts, each account has its own rate limit bucket.
</Warning>

**Important**: The SDK will return rate limit errors directly - you must handle them in your application code.

## Next Steps

<CardGroup cols={2}>
  <Card title="Authentication" icon="key" href="/api-reference/introduction#authentication">
    Learn how to authenticate your API requests
  </Card>

  <Card title="Send Your First Email" icon="paper-plane" href="/api-reference/emails/send-an-email">
    Start sending emails with proper rate limiting
  </Card>

  <Card title="Error Codes" icon="exclamation-triangle" href="/errors">
    See all API error codes including rate limit responses
  </Card>
</CardGroup>