Fix Facebook Webhook Verification Error in n8n | Callback URL & Token Validation Workaround
Are you trying to connect your Facebook Webhook to n8n but keep seeing this frustrating error:
“The callback URL or verify token couldn’t be validated” — even though n8n says it’s verified?
In this video, I’ll show you a step-by-step workaround to fix the Facebook webhook verification issue in n8n. You’ll learn:
✅ Why Facebook rejects the callback URL even if n8n verifies it
✅ How to use a GET webhook in n8n for instant Facebook verification
✅ How to switch back to POST requests for real message processing
This method works for Facebook Messenger, Instagram Graph API, and WhatsApp Cloud API integrations when using n8n.
💡 Tools covered in this video:
n8n
Facebook for Developers
Webhook GET & POST setup
📌 Chapters:
00:00 – Intro
00:20 – The Problem
01:01 – Why Facebook Rejects Your Webhook
01:35 – The GET Webhook Workaround
02:50 – Testing the Fix
03:15 – Switching Back to POST for Real Data
04:00 – Conclusion
#n8n #facebookwebhook #automation