# GET /markets/odds: $0.005 per call

Prediction-market odds from Polymarket: search any topic (?q=bitcoin, fed rates, election, a team) or omit q for the most-traded markets now. Each event lists its markets with outcome probabilities (%), 24h change, volume, liquidity, bid/ask, end date and link. For research, forecasting and trading agents.

- **Price:** $0.005 in USDC, the same on Base, Solana, Polygon, Arbitrum. Failed calls are never charged.
- **Free trial:** yes, 20 free calls a day from Claude, Cursor or any MCP client ([set-up](/mcp/setup)).
- **Answers cached for:** 1 min
- **Data sources:** Polymarket Gamma API (free)
- **Lane:** Crypto & on-chain ([OpenAPI](/openapi/crypto.json))
- **Live health:** [status page](/status)

## Free sample

See an answer for the demo input first, free (no payment, 10 a minute): [https://aayatai.com/sample/markets-odds](/sample/markets-odds). It is a stored real answer when we have one, otherwise an example marked `"kind": "illustrative"`.

```bash
curl "https://aayatai.com/sample/markets-odds"
```

## 1. See the price (free)

Call it without paying: you get `402 Payment Required` and a `PAYMENT-REQUIRED` header with the exact price and where to pay.

```bash
curl -i "https://aayatai.com/markets/odds?q=bitcoin&limit=5&marketsPerEvent=5"
```

## 2. Pay and call (TypeScript)

```bash
npm install @x402/fetch @x402/evm viem
```

```ts
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm";
import { privateKeyToAccount } from "viem/accounts";

// A wallet used only by your agent, holding a little USDC on Base.
const account = privateKeyToAccount(process.env.WALLET_PRIVATE_KEY as `0x${string}`);
const pay = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }],
});

const res = await pay("https://aayatai.com/markets/odds?q=bitcoin&limit=5&marketsPerEvent=5");
console.log(await res.json());
```

## 3. Or as an MCP tool

```ts
// MCP server: https://aayatai.com/mcp (Streamable HTTP). With the x402 MCP client (see /start):
const result = await client.callTool("markets-odds", {"q":"bitcoin","limit":5,"marketsPerEvent":5});
```

## Inputs

- `q` (string): Topic to search, e.g. bitcoin, fed rate cut, world cup. Leave out for trending markets.
- `limit` (integer; default `5`): Events to return.
- `marketsPerEvent` (integer; default `5`): Markets per event (multi-outcome events are cut to the likeliest).
- `includeClosed` (boolean; default `false`): Include resolved events (search only).

Bad inputs are rejected with HTTP 400 before any payment is asked for.

## Example answer

```json
{
  "query": "bitcoin",
  "events": [
    {
      "title": "What price will Bitcoin hit in September?",
      "slug": "what-price-will-bitcoin-hit-in-september-2026",
      "url": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
      "endDate": "2026-10-01T04:00:00Z",
      "volume24hUsd": 888945,
      "volumeUsd": 15635597,
      "liquidityUsd": 2497718,
      "tags": [
        "Bitcoin",
        "Crypto"
      ],
      "marketCount": 38,
      "markets": [
        {
          "question": "Will Bitcoin reach $100,000 in September?",
          "label": "↑ 100,000",
          "outcomes": [
            {
              "name": "Yes",
              "probability": 0.3
            },
            {
              "name": "No",
              "probability": 99.7
            }
          ],
          "change24hPoints": -0.1,
          "volume24hUsd": 43050,
          "volumeUsd": 1474218,
          "liquidityUsd": 129554,
          "bestBid": 0.002,
          "bestAsk": 0.004,
          "endDate": "2026-10-01T04:00:00Z",
          "closed": false,
          "slug": "will-bitcoin-reach-100k-in-september-2026"
        }
      ]
    }
  ],
  "source": "Polymarket",
  "note": "",
  "checkedAt": "2026-09-28T12:00:00.000Z"
}
```

## Related

- [GET /token/price](/services/token-price) ($0.005): Live price of any token on Base, Solana, Ethereum, BNB, Arbitrum, Polygon, Optimism or Avalanche from DEX data: USD price, total liquidity, 24h volume, buys/sel
- [GET /token/safety](/services/token-safety) ($0.02): Rug-pull and scam check for any token on Base, Solana, Ethereum, BNB, Arbitrum, Polygon, Optimism or Avalanche.
- [GET /token/report/cached](/services/token-report-cached) ($0.05): Full token report, cached tier (answers up to 15 minutes old, half price): safety (honeypot, taxes, owner powers), holders (concentration, exchange/fund/locked 
- [GET /token/report](/services/token-report) ($0.10): Full token report, live: safety (honeypot, taxes, owner powers), holders (concentration, exchange/fund/locked share), liquidity (depth, locks, pools), price act
- [GET /token/report/deep](/services/token-report-deep) ($0.25): Deep token report: everything in /token/report (safety (honeypot, taxes, owner powers), holders (concentration, exchange/fund/locked share), liquidity (depth, l
- [GET /token/new](/services/token-new) ($0.01): New token launches with real liquidity: tokens whose first DEX pool opened in the last hour (up to 24h) with at least $10k liquidity (adjustable), newest first,
- [GET /token/whales](/services/token-whales) ($0.02): Whale and exchange flows for a token on Base, Ethereum, Arbitrum, Optimism or Polygon, from its latest ~250 transfers: large transfers, deposits/withdrawals per
- [GET /wallet](/services/wallet) ($0.01): Wallet profile on Base, Ethereum or Solana: native balance, token holdings with USD values (top 25), total portfolio value, whether it is a contract, ENS name, 

New here? [Getting started in 60 seconds](/start). All services: [Aayat AI](/).