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Per-key rate limit

All endpoints are rate-limited at 5 requests per second per API key, using a sliding window. Exceeding the limit returns a 429 response: 
{
  "detail": "Rate limit exceeded"
}
Back off and retry after a short delay. The window resets within one second.

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Monthly quotas

/ip, /email, and /phone are metered. Each plan includes a monthly call allowance. When you exhaust it, those endpoints return 403: 
{
  "detail": {
    "error": "quota_exceeded",
    "reason": "plan_quota_exhausted",
    "api": "ip",
    "subscribe_url": "https://tracenow.io/app/subscribe"
  }
}
/trace, /identify, and /validate are not metered and are not subject to monthly quotas.

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Increasing limits

To increase your rate limit or monthly quota, contact us or upgrade your plan from the dashboard.