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Question

[Bug] API Create subscriber return 'the input value is not a valid WhatsApp ID'

  • May 31, 2026
  • 1 comment
  • 9 views

Yazan Suliman

The whatsapp id is valid but manychat return its not and fails to create the subscriber through the api. We are not able to fully sync the users because of this problem. For unknown reason the ids for some whatsapp returns as invalid WhatsApp ID.
Api endpoint: /fb/subscriber/createSubscriber
params: {"first_name":"yasmine","last_name":"fattouh","name":"yasmine fattouh","email":"yasmine.fattouh@icloud.com","whatsapp_phone":"+96179343148"}
Expected: the user created with the provided whatsapp id
Actual: HTTP request returned status code 400: the input value is not a valid WhatsApp ID

1 reply

Gustavo Boregio
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  • Community Moderator & Expert
  • June 1, 2026

Hey ​@Yazan Suliman this usually happens when the number is not a whatsapp user.

 

The quick way I have to test is by using a wa.me/{phone} link, like this

wa.me/96179343148 (this particular number works, but sometimes it’ll throw an error that the account is not a whatsapp user).

If you’re seeing this consistently, get a few examples and open a ticket with Manychat support so they can investigate it.