What is Fomo Api? The FOMO trader data API, explained

If you searched for "Fomo Api", you were probably looking for one of three things: FOMO's trader leaderboard as data, the wallets and trades behind a FOMO trader, or a Solana wallet PnL you can check yourself. This page covers all three.

The short answer

Fomo Api is a read-only REST API at https://api.fomo-api.com. These are its endpoints:

• GET /v1/leaderboard — FOMO's traders ranked over 24h, 7d or 30d. By default it serves FOMO's own figures as FOMO reports them; board=solana ranks by realized PnL we compute ourselves. Public: 10 rows without a key, 20 with a free key, the full top 150 on a paid plan.
• GET /v1/traders/:traderId/trades — one trader's last 30 days of trades across the wallets we've linked to them.
• GET /v1/wallet/:address — one Solana wallet's performance: realized PnL, return, volume, trade count, and coverage.
• GET /v1/wallet/:address/trades — the individual swaps behind those numbers, newest first, with venue and source.
• GET /v1/plans — current plans, quotas, and rate limits, so you never hardcode them.

Authentication is a single Authorization: Bearer <API_KEY> header. Responses are JSON. Errors follow one shape. That's the whole surface — deliberately.

What makes it different

Every trader-analytics product will give you a PnL number. The question is whether you can ship a product on top of it. Fomo Api is built around one rule: every number says where it came from and what it measures.

• Labelled sources. A leaderboard response says source: "fomo" when it carries FOMO's figures and source: "computed" when it carries ours, and pnlBasis says whether the PnL is mark-to-market or realized. Two different measurements never share a field without saying so.
• Coverage on every computed number. coveragePct says how much of a wallet's activity our PnL is based on. A wallet at 100% coverage and one at 40% are not the same signal, and we don't pretend they are.
• Null means unknown, not zero. A metric we can't compute with enough confidence comes back as null, so your UI never renders a fabricated $0.
• Realized PnL from FIFO cost basis. Not "current holdings minus something". Read how the PnL is calculated.
• Source vs venue. Where a trade originated (a bot, a wallet UI) is reported separately from where it executed (Jupiter, Pump AMM, OKX…), so you don't reverse-engineer swap classification yourself.
• Verified wallet links. A trader's wallets only lists links we're prepared to publish. An empty list means we haven't linked one yet, and walletLinkPending says so.

Who uses it

• Copy-trading and wallet-tracking bots that need FOMO's top traders and the wallets they trade from.
• Portfolio and analytics dashboards that show a wallet's realized performance without running their own indexer.
• Research teams comparing trader cohorts across time windows.
• Anyone who was hardcoding scraped leaderboard data and wants an endpoint instead.

Pricing in one paragraph

Free is 1,500 calls a month. Starter is $39 for 75,000 calls. Pro is $89 for 300,000. Growth is $349 for 1.5 million. One HTTP request is one call regardless of how many rows it returns, quotas reset on the calendar month in UTC, and you can pay in USD or INR. There are also 30-day passes for Starter, Pro and Growth if you'd rather not set up a recurring mandate. The pricing page and GET /v1/plans are always current.

Get started in two minutes

1. Sign in to the console with your email — a one-time code, no password.
2. Create an API key. Copy it once; it's shown once.
3. Call the leaderboard:

   curl "https://api.fomo-api.com/v1/leaderboard?window=30d&limit=20" \
     -H "Authorization: Bearer <API_KEY>"

Then read the Fomo Api docs overview, the FOMO leaderboard API guide, or the Solana wallet PnL quickstart for Node and Python examples. Looking for an official FOMO API? There isn't one; here's what the fomo.family API situation is.

Frequently asked questions

What is Fomo Api?

Fomo Api (fomo-api.com) is an independent developer API for FOMO (fomo.family) trader data. It serves FOMO's leaderboard as FOMO reports it, the trading wallets we've linked to each trader, their trades, and Solana wallet PnL we compute ourselves from on-chain swaps, with a coverage figure on every computed number.

Is Fomo Api affiliated with FOMO, FomoScan, or FomoAPI.io?

No. Fomo Api is an independent product, not affiliated with FOMO, FomoScan or FomoAPI.io. Where we publish FOMO's own figures they're labelled as reported by FOMO; everything else we compute ourselves from on-chain data.

Is there a free tier?

Yes. The Free plan includes 1,500 API calls per month at 10 requests per minute, with access to the leaderboard and wallet endpoints. No credit card is required.

Which chains does Fomo Api cover?

The leaderboard covers FOMO's traders on every chain FOMO shows. Our own computed PnL (board=solana and the wallet endpoints) is Solana today; EVM is in progress.

How do I get an API key?

Sign in to the developer console with your email, open API keys, and create a key. Send it as a Bearer token in the Authorization header.