x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
162,919
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
1,681
Network identifiers
182

These results as JSON

GET https://2s.io/api/predict/kalshi-events · 1 observation
Browse Kalshi events (an event groups related markets, e.g. an election or a game). Filter by status / series_ticker; page with limit + cursor. Returns event ticker, series, title, category, and market count. Read-only (no Kalshi key needed).

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/kalshi-market · 1 observation
A single Kalshi market by ticker. Returns yes/no bid+ask and last price (dollars, implied probability), volume, liquidity, open interest, open/close times, and settled result. Read-only (no Kalshi key needed).

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/kalshi-markets · 3 observations
Browse Kalshi regulated prediction markets. Filter by status (open/closed/settled), event_ticker, series_ticker, or specific tickers; page with limit + cursor. Each market returns yes/no bid+ask and last price (in dollars, 0-1 = implied probability), 24h + total volume, liquidity, open interest, open/close times, and result if settled. Read-only mirror of Kalshi's market list (no Kalshi key needed).

2s profile

  • Base · exact
    $0.0025 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Coinbase CDP · seen
    Coinbase CDP reports 10 calls and 7 unique payers in 30 days. Last call .
  • Solana · exact
    $0.0025 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Coinbase CDP · seen
  • Base · exact
    $0.0025 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/kalshi-orderbook · 1 observation
Order book for a Kalshi market by ticker: resting yes and no bids with price (dollars) and size (contracts). Optional depth. Read-only (no Kalshi key needed).

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/kalshi-trades · 1 observation
Recent trades on Kalshi, optionally filtered to one market ticker. Returns each trade's ticker, contract count, taker side, yes/no price (dollars), and time. Page with limit + cursor. Read-only (no Kalshi key needed).

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/leaderboard · 1 observation
Polymarket smart-wallet leaderboard: top traders ranked by realized volume or profit (P&L). Choose the time window (1d/7d/30d/all) and rankBy (vol/pnl); cap with limit. Each entry returns rank, wallet (proxy) address, trader name, X handle, verified badge, total USD volume, and USD P&L — for tracking smart money. Pair the wallet with predict.positions / predict.activity / predict.wallet. Read-only from Polymarket's Data API.

2s profile

  • Base · exact
    $0.0048 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/limitless-markets · 1 observation
Active prediction markets on Limitless Exchange (on-chain, Base; keyless). Each market: conditionId, title, slug, description, status, live YES/NO prices, volume, liquidity, collateral token, expiration, and categories/tags. A second venue alongside the Polymarket (predict.markets) and Kalshi (predict.kalshi-markets) clusters — for cross-venue prediction-market coverage.

2s profile

  • Base · exact
    $0.0012 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/market · 1 observation
A single Polymarket market by conditionId, slug, or id. Returns the question, outcomes + live prices (implied probabilities), CLOB token ids, USD volume + liquidity, dates, description, and URL. Pass one of conditionId / slug / id.

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/markets · 1 observation
Browse Polymarket prediction markets. Filter by active/closed, order by volume/liquidity/endDate, page with limit/offset. Each market returns its question, outcomes + live outcome prices (implied probabilities), CLOB token ids (use with predict.price / predict.orderbook / predict.price-history), USD volume + liquidity, open/close dates, and the Polymarket URL. Read-only mirror of Polymarket's public market list.

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/matched-pairs · 3 observations
Cross-venue equivalent-market pairs for arbitrage / relative-value spotting. We fuzzy-match open Polymarket vs Kalshi markets by title-token overlap and return candidate pairs with both venues' YES prices and the implied-probability spread (Polymarket YES minus Kalshi YES). Tune with minScore (0-1 title-similarity floor) and limit. Heuristic — a high score is a strong candidate, not a guaranteed identical contract. Read-only, keyless. No public source maps these directly; the pairing is derived

2s profile

  • Base · exact
    $0.0120 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Solana · exact
    $0.0120 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Coinbase CDP · seen
  • Base · exact
    $0.0120 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/orderbook · 1 observation
Full CLOB order book (bids + asks with price and size) for a Polymarket outcome token. Use the clobTokenIds from predict.markets. Read-only depth snapshot from Polymarket's CLOB.

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/positions · 1 observation
A wallet's open Polymarket positions. Pass the wallet (proxy) address; cap with limit. Each position returns the market title + outcome, share size, average vs current price, initial vs current USD value, unrealized USD P&L and percent P&L, whether it's redeemable, and the conditionId/slug. For inspecting any trader's live book (e.g. a wallet from predict.leaderboard or predict.whales). Read-only from Polymarket's Data API.

2s profile

  • Base · exact
    $0.0048 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/price · 1 observation
Live best bid, best ask, and midpoint for a Polymarket outcome token (CLOB token id — get it from predict.markets clobTokenIds). The midpoint is the market's implied probability for that outcome. Read-only from Polymarket's CLOB.

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/price-history · 1 observation
Time-series price (implied-probability) history for a Polymarket outcome token. Pass the CLOB token id and an interval (1h, 6h, 1d, 1w, 1m, max). Returns timestamped price points — for charting how a market's odds moved. Read-only from Polymarket's CLOB.

2s profile

  • Base · exact
    $0.0020 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/search · 3 observations
Cross-venue prediction-market keyword search across Polymarket, Kalshi, and Limitless Exchange in one call. Pass q (required); filter by status (open/closed) and cap per-venue with limit. Each hit is tagged with its venue and returns the question, live YES/NO price (0-1 implied probability), USD volume, close date, and the venue URL — for finding the same real-world question wherever it trades. Read-only, keyless.

2s profile

  • Solana · exact
    $0.0120 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Coinbase CDP · seen
    Coinbase CDP reports 2 calls and 2 unique payers in 30 days. Last call .
  • Base · exact
    $0.0120 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Coinbase CDP · seen
  • Base · exact
    $0.0120 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/sports · 3 observations
Sports prediction markets across Polymarket and Kalshi in one call — game lines, futures, and props (NFL/NBA/MLB/NHL/soccer/tennis/etc). Optionally narrow with league (a tag/category keyword, e.g. nfl, soccer, world-cup) and cap with limit. Each hit is tagged with its venue and returns the question, live YES/NO price (implied probability), USD volume, close date, and the venue URL. Read-only, keyless.

2s profile

  • Solana · exact
    $0.0120 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0120 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Coinbase CDP · seen
  • Base · exact
    $0.0120 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/trades · 1 observation
Recent Polymarket trades. Filter by market (conditionId) and/or user (wallet address); page with limit (max 500). Each trade returns wallet, trader name, side (buy/sell), outcome, size, price, USD notional, timestamp, market title, and tx hash. Read-only from Polymarket's Data API.

2s profile

  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/wallet · 1 observation
A Polymarket trader's portfolio by wallet address: total portfolio USD value plus open positions (market title, outcome, size, average vs current price, current value, and unrealized PnL). For tracking a wallet's prediction-market book. Read-only from Polymarket's Data API.

2s profile

  • Base · exact
    $0.0050 (USDC)
    agentic.market · seen
GET https://2s.io/api/predict/whales · 1 observation
Polymarket whale radar: the largest recent trades by USD notional across all markets, ranked. Optional minUsd floor and limit. Each entry includes wallet, trader name, market, side, outcome, size, price, USD value, and tx hash — for tracking smart-money / large positioning. Read-only from Polymarket's Data API.

2s profile

  • Base · exact
    $0.0020 (USDC)
    agentic.market · seen
GET https://2s.io/api/product/gtin · 3 observations
Looks up product details by GTIN barcode number.

2s profile

  • Base · exact
    $0.0014 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Dexter · seen
  • Solana · exact
    $0.0014 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Dexter · seen
  • Base · exact
    $0.0014 (USDC)
    agentic.market · seen
GET https://2s.io/api/property/nyc-deed-history · 5 observations
Fetches deed history records for New York City properties.

2s profile

  • Base · exact
    $0.0030 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Dexter · seen
  • Solana · exact
    $0.0030 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Dexter · seen
  • Base · exact
    $0.0030 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Solana · exact
    $0.0030 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Coinbase CDP · seen
  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
GET https://2s.io/api/property/nyc-parcel-lookup · 1 observation
NYC tax-lot lookup via PLUTO (Primary Land Use Tax Lot Output) — every tax lot in the city with owner, zoning, lot/building area, year built, classification, lat/lon, community + school + council + police districts. Pass `bbl` (10-digit Borough-Block-Lot composite, e.g. 1010110001 for the Empire State Building) for an exact lookup, OR pass `address` (partial-match) optionally constrained by `borough` (name or 2-letter code MN/BX/BK/QN/SI). The BBL returned here is the universal join key for all

2s profile

  • Base · exact
    $0.0012 (USDC)
    agentic.market · seen
GET https://2s.io/api/property/nyc-permits · 1 observation
NYC Department of Buildings permit issuance — every construction, alteration, or demolition permit ever issued. Search by `bbl` (10-digit) or `address` (street_name substring). Filter by jobType (A1=Major Alteration, A2=Minor Alteration, A3=Minor Cosmetic, NB=New Building, DM=Demolition, etc.) or permitStatus (ISSUED, IN PROCESS, RE-ISSUED, REVOKED, etc.). Each row carries job + permit numbers, work type, building type, residential flag, filing/issuance/expiration dates, estimated fee. Use for c

2s profile

  • Base · exact
    $0.0012 (USDC)
    agentic.market · seen
GET https://2s.io/api/property/nyc-violations · 3 observations
Fetches New York City property violations data for an address or property record.

2s profile

  • Solana · exact
    $0.0012 (USDC)
    Recipient TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn
    Dexter · seen
  • Base · exact
    $0.0012 (USDC)
    Recipient 0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5
    Dexter · seen
  • Base · exact
    $0.0012 (USDC)
    agentic.market · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.