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

# API Rate Limits

The Faseeh API uses a credit-based system with concurrent request limits to ensure fair usage and optimal performance for all users.

## Concurrent Requests

For streaming text-to-speech requests, Faseeh enforces concurrent request limits based on your subscription plan. This ensures stable performance and prevents system overload.

**Concurrent Request Limits by Plan**:

* **Basic**: 2 concurrent requests
* **Starter**: 5 concurrent requests
* **Growth**: 10 concurrent requests
* **Scale**: 20 concurrent requests
* **Enterprise**: Unlimited concurrent requests

<Note>
  When you exceed your concurrent request limit, you'll receive a `42901` error (ConcurrencyLimitError). You can either wait for existing requests to complete or upgrade your plan to increase your limit.
</Note>

## Best Practices

1. **Monitor your usage**: Check your credit balance and concurrent request limits regularly
2. **Plan ahead**: Consider your usage patterns when selecting a subscription plan
3. **Handle rate limits**: Implement retry logic with exponential backoff for 429 errors

## Subscription Plans

For detailed information about subscription plans, credit limits, concurrent request limits, and pricing, visit:

**[View Subscription Plans →](https://app.faseeh.ai/en/subscription)**