It is possible to create lead-gen/website cards using the API (at first glance it doesn't seem so)?

FliteDavey · 2014-06-03T17:54:42.000Z

Neither is listed under the types in twitter:card - I just want to confirm they are only available on Twitter to advertiser users.

rchoi · 2014-06-16T06:03:17.000Z

See the new section on website and lead gen cards here: