Question

Is it possible to somehow get an access token to use the facebook api like a user that clicked “use facebook as “?

What I’m trying to do is to allow my website to post messages to the facebook page’s wall. I already have an app which I use to allow my users to login with their FB account. However, I’d prefer not to require a page admin to authorize full manage_pages to my app. I already added the app to my FB page, but there are no options to give that app some permissions for my page.

Answer 1

Of course it’s possible.

In the official documentation page about Permissions it’s written:

Page access_token

An access_token used to manage a page. This is used
when you want to perform an operation acting as a Page. This access
token is retrieved by issuing an HTTP GET to /USER_ID/accounts or to
/PAGE_ID?fields=access_token with the manage_pages permission. Getting
/USER_ID/accounts will return a list of Pages (including app profile
pages) to which the user has administrative access in addition to an
access_token for each Page. Alternatively, you can get a page access
token for a single, specific, page by issuing an HTTP GET to
/PAGE_ID?fields=access_token with the manage_pages permission (you
must ask for the access_token field specifically via the fields=
parameter). See the documentation for the Page object for more
information. NOTE: After November 1, 2011, manage_pages permission
will be required for all access to a user’s pages via this connection,
i.e. for both reading the user’s pages and also retrieving
access_tokens for those pages. See the documentation for the User
object for more information.