AdSkull
URL to AI UGCCampaign AutomationAI CopilotMeta Ads AutomationTikTok Ads AutomationSnapchat Ads AutomationAI Video StudioAI Image StudioFree ToolsFREEPricingFor AgenciesExamples GalleryAffiliate ProgramAPI DocsContact
Get started free
TikTok APIError 40100

TikTok API Error 40100 — Invalid Access Token

TikTok API error 40100 means your access token is invalid, expired, or revoked. Step-by-step fix for re-authenticating and generating a new valid token.

Quick Answer

TikTok API error 40100 means the access token used in the API request is invalid, expired, or has been revoked. Fix it by re-authenticating the user: revoke the existing token, redirect through TikTok OAuth authorization again, and exchange the new authorization code for a fresh access token.

What Causes TikTok Error 40100?

TikTok access tokens have a fixed expiry (usually 24 hours for short-lived, up to 365 days for long-lived app tokens). Once expired or revoked (user disconnected, password change, BC admin revocation), every API call returns 40100. Unlike Meta refresh tokens, TikTok does not have a silent refresh flow — you must re-run the OAuth authorization flow.

  • 1Access token has expired (TikTok tokens expire after a fixed period)
  • 2User manually revoked app access in their TikTok settings
  • 3BC admin revoked the app's access to the advertiser
  • 4Token was issued for a different environment (sandbox vs production)
  • 5App credentials (app_id/secret) were rotated and old tokens are now invalid

How to Fix TikTok Error 40100

  1. 1Verify the token status by calling GET /open_api/v1.3/advertiser/info/ — a 40100 confirms the token is invalid.
  2. 2Revoke the existing token from your database.
  3. 3Redirect the user to the TikTok OAuth authorization endpoint to re-authenticate.
  4. 4Exchange the returned authorization code for a new access token and refresh token.
  5. 5Store the new token with its expiry timestamp and re-test the failing API call.
  6. 6Set up a token refresh reminder (alert 7 days before token expiry) to prevent future 40100 errors.

Official TikTok Documentation

https://business-api.tiktok.com/portal/docs?id=1738373164380162

↗
Never Deal With This Again

AdSkull Handles TikTok API Errors Automatically

Stop manually debugging API errors. AdSkull monitors your TikTok campaigns 24/7, detects authentication failures and permission issues, and surfaces clear actionable fixes — or handles them automatically when possible.

✓Automatic token refresh before expiry
✓Real-time permission alerts
✓Smart retry with exponential backoff
✓Unified dashboard for all platforms
✓Plain-English error explanations
✓One-click reconnect for auth issues
Fix This For Good — Free TrialView Integration Docs

Other TikTok API Errors

40002

Insufficient Permission

TikTok API error 40002 means your OAuth token can see the advertiser but lacks the resource-level permission for the requested action. Learn the 2026 Business Center fix and how AdSkull prevents it automatically.

40001

App Not Authorized

TikTok API error 40001 means the app is not authorized to access the requested advertiser or resource. Learn the exact fix and re-authorization steps.

50002

Service Temporarily Unavailable

TikTok API error 50002 means TikTok's service is temporarily unavailable. Learn how to implement retry logic and exponential backoff to handle this automatically.

2200006

Video Processing Failed

TikTok API error 2200006 often means your uploaded video has not finished processing or failed TikTok's async media pipeline. Learn the polling fix and how AdSkull handles it automatically.

← All API Error Guides