social

FollowBack

Inactive

Find who ignores you and ghosts on Farcaster.

Problem

Farcaster users had no quick way to see which accounts they follow that never follow them back, or which followings have gone dormant.

Approach

Built as a Farcaster Mini App on Next.js 15 with the frame-sdk for in-client context. Two API routes hit a Farcaster Hub directly: one diffs linksByFid against linksByTargetFid to compute non-reciprocal follows, the other fans out castsByFid in batches of 50 via Promise.allSettled and sorts followings by last-cast timestamp. Results render as tabbed lists with sdk.actions.viewProfile for one-tap navigation.

Outcome

Shipped as a Mini App that surfaces non-followers and inactive followings directly inside Farcaster clients.