TikTok Events API Errors: Common Issues and Fixes

The TikTok Events API returns specific error codes when event submissions fail. Here’s how to diagnose and fix the most common issues.

Error Code Reference

Code	Message	Cause	Fix
0	OK	Success	No action
40001	Invalid access token	Token expired or wrong	Regenerate in pixel settings
40002	Invalid pixel ID	Wrong pixel ID	Verify pixel ID
40101	Permission denied	Token lacks scope	Check token permissions
40103	Rate limit exceeded	Request rate or size over the limit	Send fewer events per request
40200	Invalid event format	Wrong event name or fields	Check event name, data types
40301	Event too old	>28 days from click	Upload faster

Common Issues

Invalid Access Token (40001)

The most common error. Access tokens can expire when:

• Your TikTok account permissions change
• The token was generated by a user who lost access
• Account security settings were updated

Fix: Generate a new access token in pixel settings.

Rate Limit (40103)

TikTok allows up to 1,000 events in one Events API 2.0 request. Requests above that limit are rejected. Sending events as they occur is preferred over holding a large batch.

Fix: Keep each request at or under 1,000 events, and send events as they occur instead of saving them for one large batch.

Event Too Old (40301)

TikTok’s event window is 28 days — longer than Meta’s 7 days but shorter than Google’s 90 days.

Fix: Upload daily to keep events well within the window.

Invalid Event Format (40200)

Common format issues:

• Using custom event names instead of standard names
• Wrong data types (string where number expected)
• Missing required fields

Fix: Use standard TikTok event names: CompletePayment, PlaceAnOrder, Contact, SubmitForm.

How TUOCA Handles TikTok Errors

1. Token management — Monitors token validity and alerts on expiration
2. Batch optimization — Keeps each request at or under 1,000 events
3. Rate limiting — Slows requests that TikTok rejects for size or frequency
4. 28-day validation — Warns when events approach the window limit
5. Error logging — Detailed error information in Activity Logs