Last Updated: April 30, 2025.
Our goal is simple: price the truth.
Bad information costs society trillions. By letting anyone trade on factual claims, we surface collective intelligence and put money behind real evidence.
Engine
Short description
Dynamic Pari-Mutuel (DPM)
One shared pool. Payouts are decided after the pool closes. Odds = $Yes in pool ÷ $Total.
Central Limit Order Book (CLOB)
Classic order book. One token per market, priced 0-1. Trades settle instantly; resolution uses Volume-Weighted Average Price (VWAP) for FactCheck markets, and a preset specific-resolution condition for Information markets.
The rest of the docs explain how each engine works and when we use which.
How it works
Resolution
A panel of credibly neutral AI agents reviews submitted evidence and assigns a final outcome. The decision is final unless the market is cloned with stronger evidence.
Each market lists an objective public data source. At expiry we check the source: if the stated condition is true, tokens pay 1 USDC, else 0.
This scheme aligns price with evolving evidence and makes last-minute manipulation prohibitively expensive.
Bots post laddered quotes, widen spreads during volatility, rebalance inventory and arbitrage external feeds—so you always have a counter-party.
Role
Fee
Maker (adds liquidity)
0%
Taker (removes liquidity)
0.5%
Fees are deducted and routed to the treasury when collateral is locked.
Model
FactCheck
Information
DPM
✅ Live today. AI decides outcome; pool funds stay locked until resolution.
🚫 Not offered
CLOB
✅ AI confidence score triggers resolution when ≥ 90%. VWAP sets settlement price. You can trade in and out.
✅ Binary condition checked on external data. You can trade in and out.
Option
What happens
When to use
Twitter / X
One-click OAuth via Privy. Your handle is the default display name (editable).
Fastest if you already use X.
Enter address → click Submit → confirm magic-link. Privy spins up a custodial smart-wallet.
You prefer not to link social or crypto—yet..
Connect Wallet
Link any EVM wallet (MetaMask, Rabby, Coinbase Wallet). Privy wraps it so trades are gas-sponsored.
You already manage on-chain assets.
Security — your private key never leaves your device; FactCheck only sees signed payloads.
1. Wallet tray → Add funds.
2. Pick a rail:
Rail
Flow
Fees
External wallet
Send USDC to your deposit address. Funds are credited after a few seconds
Network gas.
Internal transfer
Move USDC between your FactCheck sub-accounts.
Free.
QR / address share
Show QR or raw address so third parties can fund you.
Sender pays gas.
Balance updates in real time; funds are trade-ready immediately.
1. Wallet tray → Withdraw.
2. Enter a Base-mainnet address and amount (≥ 1 USDC).
3. Sign the zero-gas message; funds arrive in ~30 s (two Base blocks).
Parameter
Default
Notes
Gas
Sponsored by FactCheck
No user gas.
Daily limit
50 000 USDC
Contact support to raise.
Cooldown
None
Unlimited daily withdrawals within limit.
Tip — Used email/Twitter sign-in? Withdraw to your browser wallet, then reconnect with Connect Wallet for self-custody.
Issue
Likely cause
Fix
Deposit confirmed but balance zero
Sent on wrong chain
Bridge to Base, then re-deposit.
"Invalid address" on withdraw
Non-Base address
Use a Base 0x... address.
Magic-link not working
Expired / spam folder
Request a new link.
Referral split (DPM) — 45% of the 2.5% fee goes to the referrer, 5% to the creator, 50% to the treasury.
Title
Model
Type
YES = 1 criteria
Expiry
Payout
Fed Cut at May FOMC?
CLOB
Information
Upper bound in FOMC statement < 5.25%
07 May 2025 14:00 ET
Seconds after statement
Did Jeffrey Epstein kill himself?
CLOB
FactCheck
AI confidence ≥ 90% — then VWAP
On trigger
TBD
Bitcoin ≥ 100 000 USD on 30 Jun 2025
CLOB
Information
Coinbase hourly close ≥ 100 000 USD
30 Jun 2025 23:00 UTC
01 Jul 2025
Nation-Wide TikTok Ban by 31 Jul 2025
CLOB
Information
Signed statute / EO forces ban or divest
31 Jul 2025 23:59 ET
Immediate
GPT-5 Paper Before 1 Oct 2025
CLOB
Information
PDF titled "GPT-5" by OpenAI publicly released
01 Oct 2025 00:00 UTC
Immediate
Maker-keeper bots seed liquidity from minute one.
Trading on FactCheck.fun is speculative. Do not risk money you cannot afford to lose. Past results do not guarantee future performance. Nothing herein constitutes investment advice.