Is there any way how to get public_profile information from messenger api? I need just first name of the user.
I have tried GET https://graph.facebook.com/<PSID>?fields=first_name&access_token=<PAGE_ACCESS_TOKEN> (https://developers.facebook.com/docs/messenger-platform/identity/user-profile/), but it only works for me and my page. For other users I got error:
(#3) Application does not have the capability to make this API call."
Do I need to request Business Asset User Profile Access? Is public_profile completely useless for messenger bot?
I am totally lost in FB doc and all other information I found is too old.
Yes you will need Business Asset User Profile Access.
There is a notice on the page which you linked to: "To retrieve a user’s profile information, you need to have Advanced Access for the Business Asset User Profile Access feature."
:)