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

# Error rate spike

> Get notified when your error rate climbs above a threshold

Error rate spike alerts you when the share of failed requests goes above a percentage you set. Use it as an early warning that something is broken: a misconfigured client, an outage at a provider, or a bad deploy on your end.

## When to use it

* Catching elevated failure rates before users start complaining.
* Knowing when an integration is silently failing in the background.
* Tracking provider-side issues without watching dashboards.

This alert needs enough traffic for the percentage to be meaningful. Very low-volume accounts may not see it fire often.

## What you configure

| Setting | What it does |
| - | - |
| **Threshold Percentage** | The error rate that triggers the alert (e.g. `10` for 10%). |
| **Status Codes** | Optional. Only requests with these HTTP status codes count as failures. Leave empty to count every failed request. |
| **Scope** | Whose traffic to watch: your personal traffic, or your organization's. |
| **Schedule** | How often to evaluate: every minute, hourly, daily, or weekly. |

Organization scope is available if your role can see organization-level traffic.

## Narrowing to specific status codes

By default every non-2xx response counts as a failure. Pick one or more status codes to watch only those. The rate is still measured against all of your traffic, so a threshold of 10% with `429` selected means "alert me when more than 10% of my requests are rate limited."

Common combinations:

| Goal | Codes |
| - | - |
| Rate limit alert | `429` |
| Provider outage or slowness | `424`, `504` |
| Billing problems | `402` |

Available codes: `400`, `401`, `402`, `403`, `422`, `424`, `429`, `500`, `503`, `504`. These are the codes the API returns for authenticated requests; anything else is never attributed to your account.

## How you're notified

Email and/or SMS, based on your preferences in **Settings → Notifications**. See [the alerts overview](/docs/alerts/overview) for delivery details and cooldown behavior.