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

# Rate Limits & Quotas

> Understanding tiers, quotas, and throughput limits.

OTP Edge uses a tier-based quota system to ensure infrastructure stability and fair usage across all workspaces.

## Quota Tiers

Your monthly request quota is determined by your subscription tier.

| Tier                 | Monthly Quota   | Features                             |
| :------------------- | :-------------- | :----------------------------------- |
| **7-Day Free Trial** | 10,000 requests | Edge routing, Basic Logs             |
| **Monthly**          | 10,000 requests | Priority routing, Advanced Analytics |
| **Annual**           | Unlimited       | Dedicated infrastructure, SLA        |

## Quota Exhaustion

If your workspace exceeds its monthly quota, the API will return a `429 Too Many Requests` error.

```json theme={null}
{
  "error": "Usage quota exceeded. Please top up or upgrade.",
  "code": "QUOTA_EXCEEDED"
}
```

To resume service, you can either wait for your next billing cycle to reset or upgrade your tier in the **Billing** section of your dashboard.

## Anti-Spam Guardrails

To protect your account from malicious bots and "OTP bombing" attacks, we enforce a strict cooldown per recipient.

* **Recipient Cooldown**: 60 seconds per phone number.
* **Max Verification Attempts**: 5 failed verification attempts per OTP code before the code is permanently invalidated.
* **Error Response**: `429 Too Many Requests` with code `SPAM_COOLDOWN`.

<Note>
  These guardrails are active on all tiers to protect your workspace reputation and budget.
</Note>