Polymarket markets, odds

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Polymarket prediction markets: the most traded open markets by 24-hour volume, or the markets matching a search, each with outcome prices (implied probability), best bid and ask, last trade, day change, volume, liquidity, end date, slug and CLOB token ids. Use to get the odds on an election, sports, crypto or news event, or to find a market before reading its order book.

Guide: Polymarket API, prediction market odds

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Try it with your own inputs

Optional search, e.g. bitcoin, election, fed rates; without it the top markets by 24h volume

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
qstringOptional search, e.g. bitcoin, election, fed rates; without it the top markets by 24h volume
limitintegerMarkets to return, 1-20 (default 10)
closedstringtrue for resolved or closed markets instead of open ones

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/polymarket/markets?q=bitcoin"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/polymarket/markets?q=bitcoin&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "query": "bitcoin",
  "closed": false,
  "count": 1,
  "markets": [
    {
      "question": "Will the price of Bitcoin be above $72,000 on November 5?",
      "slug": "bitcoin-above-72k-on-november-5-2026",
      "conditionId": "0x…",
      "outcomes": [
        {
          "name": "Yes",
          "price": 0.9955,
          "tokenId": "7755…"
        },
        {
          "name": "No",
          "price": 0.0045,
          "tokenId": "8888…"
        }
      ],
      "volume24h": 98817.32,
      "volume": 250000.5,
      "liquidity": 40000,
      "bestBid": 0.995,
      "bestAsk": 0.996,
      "lastTradePrice": 0.996,
      "dayChange": 0.01,
      "endDate": "2026-11-05T17:00:00Z",
      "active": true,
      "closed": false,
      "url": "https://polymarket.com/event/bitcoin-above-on-november-5-2026"
    }
  ],
  "note": "Polymarket public data at call time; prices are the market's implied probability (0-1). Not financial advice.",
  "checkedAt": "2026-11-05T16:40:00.000Z"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is polymarket_markets, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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