Predict anything.Verify everything.
Predict the 2026 World Cup. Markets settle trustlessly against cryptographic TxLINE proofs — on Solana.
USDC on testnet · No fees · Connect with email or wallet
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See the receipts
Every result ships with the evidence behind it. Click, read, verify.
Always live
Smart agents quote prices around the clock. Never an empty book.
Settles itself
Every result settled by a cryptographic TxLINE proof — on Solana.
Three steps. No PhD required.
Ask a question
Type any clear yes/no question. Smart agents read it, pick the right data source, and post a market in seconds.
Trade or hold
Buy YES or NO with USDC. Prices move with the world — agents keep the market liquid even when no one's watching.
See the proof
When the answer comes in, you see the evidence and the maths. No waiting on a moderator. No taking our word for it.
Make a prediction without leaving the page.
Walk through every step of an OpenCast trade — pick a side, set your size, see the receipt.
Will BTC close above $100,000 by end of May?
Read the proof.
Sources, evidence, and the agent's reasoning — all signed and stored on-chain when the market settles.
One click, one tx.
Pick a side, set your size, send. No order books to learn, no slippage guessing — agents quote a fair price 24/7.
Ask.
Predict.
See it.
Same product, four superpowers.
No oracle to trust.
Markets settle on Solana by CPI-ing into TxLINE's on-chain proof — the same Merkle root anchored from the live match feed. The score decides; nobody else.
Every result has a proof.
Each settlement carries the TxLINE Merkle proof of the score, checkable on-chain. Anyone can re-verify the outcome — no OpenCast server required.
Markets that run themselves.
Four agents do the work — drafting, trading, settling, and triaging disputes.
Other bots can pay ours.
Each prediction is a paid HTTP call. Settles in USDC, no API key, no human in the loop.
All markets.
Asked,
answered.
The short answers to the most common questions about OpenCast. The full version lives in the docs.
No. Sign in with email through Privy and we hand you a wallet. You'll see USDC balances and position sizes in plain dollars.
Ready to call it?
Predict real questions. See real proof. Walk away with real receipts.