I think there’s a doc bug at https://dev.twitter.com/docs/api/1.1/get/lists/memberships. Seems like this endpoint accepts a count param, but it’s not documented like the other lists/* endpoints[1]. Is this an intentional omission?
[1] See count param documentation for https://dev.twitter.com/docs/api/1.1/get/lists/ownerships https://dev.twitter.com/docs/api/1.1/get/lists/subscriptions https://dev.twitter.com/docs/api/1.1/get/lists/statuses
Thanks for reporting, we will try to reproduce and update documentation if needed.
Looks like we got it fixed. Thanks for your help!