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

# Some events are delivered, but the event count is much lower than expected

> Destination receiving fewer events than Upstack captures? The destination's API rate limit is throttling delivery. Check for 429 errors in the event log and raise your API tier if needed.

**Likely cause:** The destination's API rate limit is being hit, causing Upstack to throttle or drop events. This is more common during flash sales or high-traffic events.

**Fix:**

1. Check the destination's **Event Log** in Upstack for rate-limit errors (HTTP `429` responses).
2. If you see 429 errors, Upstack automatically retries with backoff — most events will be delivered within 30 minutes.
3. For sustained high-traffic stores, consider upgrading your destination platform's API tier:
   * Meta: Standard access tokens support up to 2,000 events/hour. Request **Advanced Access** in Meta Business Settings for higher limits.
   * TikTok: Contact your TikTok rep to increase API quota.
4. Check your Upstack plan — some plans have monthly event forwarding limits. Go to **Settings → Subscription** to see your usage. [View plans and pricing](/billing/plans-and-pricing) if you need to upgrade.

***

**Still stuck?** Contact [support@upstackdata.com](mailto:support@upstackdata.com) with your Pixel ID and a description of the issue. We typically respond within a few hours.

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