Polymarket market detail

Get full detail for a single Polymarket market by slug or id. Returns question, description, outcome prices (implied probabilities), volume, liquidity, end date, resolution status, and CLOB token ids needed for orderbook + history lookups.

Input

Field	Type	Description
slug	string	Market slug (one of slug/id required).
id	string	Numeric market id (one of slug/id required).

Example output

{
  "id": "12345",
  "slug": "will-x-win-election",
  "question": "Will X win the election?",
  "description": "Resolves YES if X is declared the winner by AP.",
  "endDate": "2026-11-03T23:59:00Z",
  "active": true,
  "closed": false,
  "archived": false,
  "volume": 1234567.89,
  "liquidity": 56789.01,
  "outcomes": [
    "Yes",
    "No"
  ],
  "prices": [
    0.62,
    0.38
  ],
  "clobTokenIds": [
    "7290...",
    "8390..."
  ],
  "eventSlug": "us-election-2026",
  "venue": "polymarket",
  "venueUrl": "https://polymarket.com/market/will-x-win-election"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/polymarket-market \
  -H "Content-Type: application/json" \
  -d '{"slug":"will-x-win-election"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/polymarket-market", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "slug": "will-x-win-election"
  }),
});

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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