Prediction Markets x402 offerings

Get open and historical positions for a wallet address.

List Limitless markets with filtering and sorting.

List UMA oracle questions filtered by state (proposed, disputed, resolved, …).

Get historical cumulative volume data for a market.

Get historical OHLCV candlestick data for a single outcome token.

Query Kalshi markets with filtering, sorting, and pagination.

Get P&L summary and realized P&L time series for a wallet.

Get Arkham Polymarket wallet PnL summary

Get Arkham Polymarket wallet event history

Get Arkham Polymarket wallet biggest win summary

Get Arkham Polymarket wallet rewards summary

Get Arkham Polymarket positions for a wallet

Get Arkham Polymarket wallet stats summary

Get Arkham Polymarket wallet balance summary

Get Arkham Polymarket wallet portfolio summary

Get Arkham Polymarket top event breakdown

Get Arkham Polymarket wallet prediction history

Four actions on one endpoint. create opens a slot with its position, length, reserve price and closing time, and returns an admin token that only the opener holds. bid places a sealed bid, checked against the reserve, the slot length and the publisher's excluded categories before it is accepted — a rejected bid is recorded with its reason rather than silently dropped, so a bidder can see why it never competed.

Return a public Kalshi prediction-market quote, volume, open interest, and orderbook snapshot.

Map a true probability into a binary contract fair price in [0,1]. Call when pricing yes/no markets from your probability model. Returns fair price in [0,1] as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Bulk identity lookup for up to 200 wallet addresses (POST body: {addresses: [..]}).

Overround/vig from a set of mutually exclusive implied probs. Call when measuring book margin before de-vigging. Returns overround and sum of probs as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Read-only Polymarket market health: resolves a full Polymarket URL, slug, token ID, or search phrase, then returns spread, 1/2/5 cent depth, imbalance, fee schedule, and book freshness.

Best Markets to Watch ($0.02/call): The best Polymarket prediction markets to watch right now, ranked by a composite watch-score (24h volume, liquidity, competitiveness, momentum, time-to-resolution). Filter by tag. Returns implied probability, volume, liquidity, spread and a plain-English reason for each. Live data, no account needed.