Data

Who Just Joined FOMO? Tracking New Traders as They Arrive

By FOMO API · 2026-08-29 · Updated 2026-09-29 · 2 min read

FOMO pushes a notification when a trader with a notable following joins the platform. That new-user stream is a growth and talent signal available through the API.

Every platform has a moment before it is obvious. One of the cleaner ways to read where FOMO is going is to watch who is arriving. When a trader with a notable following joins, FOMO surfaces it, and that stream of arrivals is a signal in two directions at once.

Why new arrivals matter

Talent. A trader who was successful elsewhere showing up on FOMO is worth tracking from day one, before they have a track record on the platform.
Momentum. A cluster of notable accounts joining in a short window says something about where attention is flowing.
Growth. The rate of arrivals is a read on the platform itself, useful whether you are trading on it or building around it.

How to pull it

The push notification that announced a notable arrival (USER_WITH_SMART_FOLLOWING_JOINED) came from an off-device capture of FOMO's mobile notifications. That capture is no longer running and the endpoint that served it was retired in September 2026, so there is no longer a single "someone joined" event to subscribe to. Saying otherwise would be selling you an empty array.

What works instead, and is the method we use ourselves: account age is on the trader object, so any handle you see can be checked for how new it is.

curl "https://api.fomoapi.io/v2/users/{handle}" -H "authorization: Bearer YOUR_API_KEY"

That returns createdAt — FOMO's own signup timestamp — alongside accountAgeDays, plus the resolved wallets and, where available, the linked social account. A trader with accountAgeDays in single digits is a fresh arrival.

Turn that into an arrivals feed by watching the live activity stream and resolving handles you have not seen before:

wss://api.fomoapi.io/ws/alerts?key=YOUR_API_KEY

Every alert names its trader, so keep a set of handles you already know, resolve each new one once, and keep the ones whose accountAgeDays is low. That gives you arrivals who are already trading, which is arguably the more useful population than everyone who signed up — a notable account that joined and has not traded is not yet a signal.

Two honest caveats. The stream carries large trades only (a floor around $3,000 of position value, set by FOMO), so a new arrival trading small will not appear until they size up. And this finds people by their first visible trade, not by their signup, so it lags a genuine join event by however long it takes them to trade.

FOMO API is an independent, unofficial data layer for fomo.family. It is not affiliated with FOMO.

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FAQ

Can I see who just joined FOMO?

Not as a join event any more. FOMO's 'notable trader joined' push was readable only through an off-device capture that is no longer running. What you can do is check any handle's age: GET /v2/users/{handle} returns FOMO's own createdAt plus accountAgeDays, so a trader you see on the live stream can be identified as a fresh arrival in one call.

How do I find new arrivals?

Watch wss://api.fomoapi.io/ws/alerts, keep a set of handles you have already seen, and resolve each new one with GET /v2/users/{handle} - keep the ones whose accountAgeDays is low. That finds arrivals who are already trading, which lags a true signup by however long it takes them to place a visible trade.

Why track new arrivals?

They are a talent and momentum signal. A successful trader joining is worth following from day one, and a cluster of arrivals reads on where attention is flowing.

Is this affiliated with FOMO?

No. It is an independent, unofficial data layer for fomo.family and is not affiliated with FOMO.