WhatsApp Account Manager V10.3 WABA lookup
Register each Meta Developer App once. Then link its WhatsApp accounts using Facebook.
Your saved Meta Apps
Current Meta Configuration ID:
Correct wrong Embedded Signup Configuration ID (no re-registration)
Use only a Facebook Login for Business configuration with variation WhatsApp Embedded Signup, WhatsApp Cloud API, WhatsApp accounts asset, and whatsapp_business_management + whatsapp_business_messaging permissions. Ensure the saved app's JS SDK domain is allowed.
Add another Meta Developer App (one-time)
Choose an authorized WhatsApp number
Number missing? Find it using an existing WABA ID
Meta may finish without exposing WABA IDs in its token. Open Meta Business Settings / WhatsApp Manager and copy the existing WhatsApp Business Account ID (not the phone number or the phone's ID). We verify access with the Meta token before showing any numbers. This does not register or migrate numbers.
Only select existing business/number if Meta confirms it is eligible. Don't migrate or register an existing number without reviewing the impact. No messages are sent.