Find out who your X followers have in common with anyone you want to meet β the same list they'd see if they clicked "Followers you know" on your profile.
Live at: mutuals.markmoriarty.com
Enter any X username. The app computes the intersection of:
- People who follow you
- People that target follows
= people who could give you a warm intro to the target.
Results are sorted by follower count ascending (smaller accounts = more likely a real personal connection).
- Cloudflare Workers (API + HTML)
- Workers KV (24h result cache β same-day re-runs are free)
- X API v2 PAYG (pay-per-resource, not per call)
Managed at: https://console.x.com/accounts/1991676194337746947/apps/settings?appId=32868486 Git repo: https://github.com/markitics/x-mutuals
Secrets are never committed. Copy .env.example β .env.local and fill in values.
npm install
wrangler deploySecrets are set via wrangler secret put <NAME> (see .env.example for the full list).
- Multi-user login β OAuth 2.0 "Sign in with X" so anyone can use it with their own account (and their own follower list becomes the left side of the intersection)
- Engagement scoring β weight mutuals by how much they interact with you (likes, replies, retweets) vs just following. Heavy amplifiers float to the top
- Other networks β LinkedIn mutual connections, GitHub mutual followers, etc.
- Intro strength rating β estimate how well a mutual likely knows the target based on follower count, follow-back ratio, shared connections
- Payments β once multi-user is live, charge non-owner users a small fee to cover X API costs per lookup
- Landing page β proper public-facing page explaining the product, with sign-in CTA
- Terms of Service + Privacy Policy β required for public OAuth and app store listings
- Saved lookups β store past results per user, compare over time as your follower base grows
- "Who to follow back" β reverse view: among people the target follows, who are you NOT following back yet?
- Rate limit / cost dashboard β show running X API spend so there are no billing surprises