Facebook Messenger Webhooks: The Callback URL or Verify Token couldn’t be validated. Please verify the provided information or try again later.

This error message made me crazy today and cost me 15 minutes.

So writing here the potential mistake you are making so maybe you can save 10 minutes if you have found this page in 5 minutes:)

I was using Django REST Framework as my messenger backend.

And my response was basically:

return…