Know what you are
actually trading.
A venue shows you a price and a depth chart. It does not tell you the depth is parked at 95¢ where it will never trade, or that the near-identical contract on another venue resolves on a different clause. Clause reads the contract and walks the live book, and tells you plainly.
One page per question
Four tools and three records. Each answers a single question, and says so at the top of its own page.
How much size will this take?
Order-book depth is an offer. Traded volume is a fact. Type a market in plain words and get both: the headline number the venue shows, and how much of it sits close enough to the mid to actually trade.
Size a trade → ToolAre these two the same bet?
Two contracts with near-identical titles routinely resolve on different criteria. Every cross-venue screen shows them as one line with a spread between them. This reads both rule sets and names the field they disagree on.
Compare two contracts → ToolWhat does this contract require?
Venues publish the rules; nobody explains them. The criteria, the settling authority, the carve-outs, and the thing almost nobody looks for — what would make it resolve against you.
Explain a contract → ToolIs this trader worth copying?
Every leaderboard ranks wallets by dollars made — the least useful of the three questions between you and a profitable copy, and the two that matter go unasked.
Assess a wallet → ReferenceEvery venue API lies differently
The silent failure modes, published in full and free. Each returns HTTP 200 while being wrong, and each cost us hours.
Read the registry → ReferenceWere we right before?
Verdicts published before the contracts resolve, scored after. Refutations listed. A scorecard showing only hits is marketing.
See the record → ReferenceAPI and MCP
Every page here is one API call. No key, no signup. The MCP server gives an agent the checks it cannot run on its own.
Read the API →We went looking for a true cross-venue match and did not find one
6,453 candidate pairs, across 113 Polymarket and 117,228 Kalshi markets. Not one could be confirmed as the same bet. The closest six differ on who decides: media consensus on one side, inauguration on the other.
That is a negative result and we publish it as one. It is also the point: the spreads people trade across these venues sit between contracts nobody has read side by side. See the worked example →