Instant multiplayer rounds
Join live pools, see open bets on heads and tails, and watch the coin flip every few seconds.
Cointoss.gg — Live provably fair coin flip on Solana
Round 0
Betting Open
Last 100
H 53%
T 47%
(53/47)
YOU WON
+0
coins credited
Next flip in 12s
Recent
Provably fair · 1.9× wins
Flip. Win. Cash out.
Connect Phantom to play live Solana coin flip, chat, and tip players.
Live Bets
Heads (0)
Tails (0)
Next flip —
Server seed hash
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Client seed
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Client seed is set when betting locks.
Last reveal —
Result
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Server seed
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Client seed
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Before each flip we publish a hash of the server seed. When betting locks, a client seed is derived from all bets. The outcome is HMAC(serverSeed, clientSeed:round) — verifiable after reveal. Click any hash or seed to copy.
Live Solana coin flip with Phantom
Cointoss.gg is a real-time heads-or-tails game on Solana. Connect your Phantom wallet, deposit SOL for coins, and bet each round before the flip. Results are provably fair — we commit a server seed hash before betting locks, then reveal the seed so anyone can verify the outcome. Wins pay 1.9× your stake (5% house edge).
Phantom wallet login
No email passwords. Sign in with Solana via Phantom on desktop or in the Phantom mobile browser.
Transparent fairness
Check server seed hashes and past reveals in the Provably Fair panel or on our fairness guide.
FAQ — coin flip on Solana
- Is Cointoss.gg free to join?
- Yes. Login is free. You only risk the SOL you deposit and bet.
- Can I verify a flip myself?
- Yes. After each round the server seed is revealed so you can match it to the pre-round hash.
- What is the house edge?
- 5%. The flip is still 50/50 and verifiable; winners are paid 1.9× stake instead of 2×.
- How do I play on mobile?
- Open cointoss.gg inside Phantom’s in-app browser, then log in and play.