x-index: A user has a Twitter H-index of h if they have at least h tweets that each have at least h likes or retweets

• Website + X login + auto share-card + public leaderboard. (does a user even need to login, or can the interface just be put their username, although I'm thinking for leaderboards, etc., it's better for people to login)
• Zero friction: type handle → login → instant card.
• Built-in loops: share image, leaderboard, bot replies, “quote-tweet your score” CTA.
• OG images: cards look great in timelines; drives re-shares.

• Auth: X OAuth (read-only).
• Compute: last N tweets or all tweets, likes+RTs, H-index; monthly variant.
• Card: dynamic PNG (name, avatar, H-index, rank, next target).
• Leaderboard: global + by bio keyword (AI, crypto, etc.).
• Share flows: “Tweet my X-index” prefilled; bot reply on request.

• Frontend/Backend: Next.js on Vercel (Edge/API routes).
• Storage: Supabase free version (users, scores, tweets cache).
• Image: Satori/ResVG or Vercel OG.
• X API: OAuth + recent tweets (Basic paid tier).

• Daily/weekly leaderboards; niche rankings.
• Public profile pages (/u/handle) with OG image.
• “Next target” nudge in share card.