Prediction Markets x402 offerings

Top 3 prediction markets by 24h volume across Polymarket and Alpha Arcade: question, venue, implied probability, 24h USD volume, and resolution date.

Prediction markets newly listed since the last snapshot: question, venue, implied probability, 24h USD volume, and resolution date.

Recently resolved Polymarket prediction markets: question, winning outcome, resolution timestamp, and USD volume.

Prediction markets resolving within 48 hours: question, venue, implied probability, 24h USD volume, and end date.

HMM regime snapshot: entropy, posteriors, kStar, asOf, ageSeconds.

Append-only archive of /latest snapshots by EPT hour-beginning. Not a forward forecast. Pre-store hours have no row.

Crypto prediction markets on Polymarket: the highest-volume open BTC, ETH and crypto markets with live odds (outcome probabilities), best bid/ask, spread, 24h + total volume, liquidity, price change and end date. "Bitcoin above X", price targets, ETF and protocol events — what the prediction market ACTUALLY prices in, as flat JSON refreshed every 5 minutes. Crypto odds, Bitcoin prediction market, ETH probability. $0.001 per call.

Top Polymarket prediction markets RIGHT NOW: the 25 highest-volume open markets with live odds (outcome probabilities), best bid/ask, spread, last trade price, 24h + total volume, liquidity, 1d/7d price change, end date and event link. Flat JSON, refreshed every 5 minutes. Prediction market odds, Polymarket data, event probabilities, market sentiment. $0.001 per call.

Search Polymarket prediction markets by free text: elections, Fed rates, crypto prices, sports, geopolitics, AI. Returns the top matching open markets with live odds (outcome probabilities), best bid/ask, spread, volume, liquidity, end date and event link as flat JSON. Prediction market search, event odds lookup, "what are the odds of X". $0.001 per call — 5x cheaper than comparable PM search.

Signals from Polymarket's live public market data: top open markets by trailing volume, the biggest consensus shifts, markets entering or leaving the top 100, and a 0-100 liquidity and spread quality score with reasons. POST /v1/top-markets, /v1/market-momentum, /v1/rotation-diff or /v1/market-quality. Not affiliated with Polymarket. Pay per request in USDC.

Fetches Polymarket event data for market tracking and analysis.

Live Polymarket watchlist ranked by structural UMA resolution base-rate signals, with flip risk kept as a separate conditional axis. BEFORE YOU PAY: free substitute https://dash.polym.uk/markets.json and https://dash.polym.uk/uma-base-rates.json. THIS ADDS: The live subset ranked by structural dispute signals, computed for you. The inputs are in the free files; the ranking and the tiering are what this adds.

Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window. BEFORE YOU PAY: free substitute https://dash.polym.uk/markets.json. THIS ADDS: Little today, and we would rather you knew: the free snapshot has every field this route returns, for the whole decomposed set instead of the 40 rows this caps at, and it also carries the dominant-flow wallet that this route omits. Buy only if a small fixed-shape response beats completeness.

UMA resolution dispute and flip base rates by category and criterion clarity; descriptive historical compatibility, not a market-specific forecast. BEFORE YOU PAY: free substitute https://dash.polym.uk/uma-base-rates.json and https://dash.polym.uk/uma-flip-rate.json. THIS ADDS: The two artifacts joined into one response, dispute axis and flip axis already aligned by category. The underlying numbers are the same ones in those two free files.

Polymarket Kalshi match. Get the cheaper Polymarket or Kalshi venue for ?q=, with the gap bucketed to 10 cents. One query names the venue to buy. $0.01 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

Polymarket Kalshi spread. Get exact Polymarket and Kalshi yes prices, gap cents, the cheaper venue, and both market links. Pass ?q= as keywords, or omit q for the widest live gap. $0.01 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

Top open Polymarket prediction markets for a topic, ranked by 24h volume: event title, end date, and per-market outcome probabilities (0-1) with USD volume, from the public Gamma API (live on-chain odds). Query: ?tag=crypto|politics|economy|fed|... (any Polymarket tag slug) &limit=1-10 (default crypto, 5). JSON, 5min cache.

PolySignal ranks current Polymarket opportunities by EV, confidence, size hint, risk, and staleness for agent research workflows.

Searches Polymarket prediction markets by text and returns current outcome prices, volume, liquidity, end date and resolution status. Read-only market data, not financial advice.

Searches Polymarket prediction markets by text and returns current outcome prices, volume, liquidity, end date and resolution status. Read-only market data, not financial advice.

Get detailed information for a specific Kalshi event by ticker symbol

24h aggregate ON-CHAIN Polymarket flow by market, as ONE ed25519-SIGNED attestation (kind "onchain-flows"): per-market YES/NO volume split, net flow, trade counts and unique wallets over tx_hash-anchored Polygon trades only (platform='polymarket' AND tx_hash present — rows without a tx_hash are excluded by construction). Honest scope: Polymarket-whale on-chain activity, NOT general crypto flows. The signed window_start/window_end are the exact bounds the aggregation ran over (window_end honours the 15-min delay); USD volumes are MODELED notionals, labeled in data_basis. Top-20 markets by volume; market titles ride outside the envelope (mutable metadata, never signed). Verify FREE offline at GET /verify.

Cryptographically SIGNED settled-SPORTS-outcome ATTESTATION for one game (path params: league — one of nba|wnba|nfl|college-football|mlb|nhl|mls|epl|champions-league|laliga — and eventId, an ESPN event id). Returns the SETTLED result (winner, final score, completed) as an ed25519-signed envelope verifiable OFFLINE against the SAME published key as /v1/attest. Optional query param: winner (team abbreviation) — adds correct (true iff it matches the settled winner, null while unsettled). Data source: ESPN's public scoreboard (no key, no account). Outcome-verified truth, not a prediction — the tamper-evident settled outcome a betting/trading agent needs for settlement, dispute, or a verifiable track record. 404 (not charged) for an unknown league or event id.

PREMIUM smart-money consensus. "Smart money" is EDGE-based, not the opaque scorer: a wallet qualifies when its luck-damped realized edge over the last 30d is positive — edge_lower_bound = Wilson-95%-lower-bound(live win rate) − avg entry price > 0, from RESOLVED outcomes (same machinery as the wallets leaderboard), with skin-in-the-game floors (>= 10 trades, >= $1,000 volume). For every active Polymarket market with whale trades (>= $10,000) in the last 24h from those wallets: YES/NO volume split, net flow (USD), distinct smart-wallet count, and a direction verdict — "yes"/"no" when one side holds >= 55% of smart volume (>=10% imbalance), else "split". Sorted by smart volume, top-50. Honest degradation via {"insufficient_data": true, "reason": ...} while no wallet has a positive edge yet. 15 min delay.