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

# Rate limits

> Hostlinku request limits, response headers, and recommended backoff.

The main gateway limit is **600 requests per minute per API key** for `/v1/*`. Requests from all models using the same key share the 60-second window.

| Limit | Quota | Scope |
| - | - | - |
| Gateway RPM | **600 req/min** | Per API key, all models |
| RPD | Unlimited | Bounded by balance and key credit limit |
| TPM | Unlimited | `max_tokens` must still fit the model output limit |
| `/api/*` endpoints | **120 req/min** | Per IP address |
| Auth endpoints | **30 attempts / 15 minutes** | Per IP address |

When the limit is exceeded, the gateway returns **HTTP 429** with:

* `Retry-After`: suggested wait time in seconds.
* `RateLimit-Limit`, `RateLimit-Remaining`, `RateLimit-Reset`: quota and reset window.

Rate-limited requests **do not** reserve or consume balance.

## Recommended backoff

1. Use `Retry-After` when present.
2. Otherwise start at 1 second and double each attempt (1, 2, 4, 8 seconds) with jitter.
3. Cap retries, for example at 5 attempts.
4. Queue work in your app instead of sending bursts.

Need a higher limit?

Contact [halo@hostlinku.com](mailto:halo@hostlinku.com) with your account email and expected load. See [Usage & Limits](https://docs.hostlinku.com/en/usage-and-limits.md).


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