ToolVet
80trust / 100

Prediction Polymarket

by SiteCheck in Markets & finance

x402 APIPassing, checked 36 min ago

Active Polymarket prediction markets matching search words, or one market by slug: the question, each outcome with its price as an implied probability, volume, liquidity, end date and link. Closed markets are left out. Source: Polymarket Gamma API. Information only, not financial advice.

GET
https://api.sitecheck-api.workers.dev/api/prediction/polymarket
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
56 ms
126 ms slowest 5%
Last check
Passed
36 min ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

GET https://api.sitecheck-api.workers.dev/api/prediction/polymarket

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.sitecheck-api.workers.dev/api/prediction/polymarket?limit=2&q=bitcoin

Parameters

ParameterTypeRequiredDescription
limitstringNo1 to 20 (default 5)
qstringNoSearch words, e.g. bitcoin
slugstringNoOr one market's slug

Example response

The provider's example. We can't check it without paying.

Example response, 51 lines
{
  "checkedAt": "2026-10-14T07:00:23.176Z",
  "disclaimer": "Information only, not financial advice.",
  "markets": [
    {
      "endDate": "2026-10-14T16:00:00Z",
      "link": "https://polymarket.com/event/bitcoin-above-on-october-14-2026",
      "liquidityUsd": 138901,
      "outcomes": [
        {
          "impliedProbabilityPct": 100,
          "outcome": "Yes",
          "price": 0.9995
        },
        {
          "impliedProbabilityPct": 0.1,
          "outcome": "No",
          "price": 0.0005
        }
      ],
      "question": "Will the price of Bitcoin be above $74,000 on October 14?",
      "slug": "bitcoin-above-74k-on-october-14-2026",
      "volumeUsd": 27262
    },
    {
      "endDate": "2026-10-14T16:00:00Z",
      "link": "https://polymarket.com/event/bitcoin-above-on-october-14-2026",
      "liquidityUsd": 40762,
      "outcomes": [
        {
          "impliedProbabilityPct": 100,
          "outcome": "Yes",
          "price": 0.9995
        },
        {
          "impliedProbabilityPct": 0.1,
          "outcome": "No",
          "price": 0.0005
        }
      ],
      "question": "Will the price of Bitcoin be above $76,000 on October 14?",
      "slug": "bitcoin-above-76k-on-october-14-2026",
      "volumeUsd": 67080
    }
  ],
  "query": {
    "q": "bitcoin",
    "slug": null
  },
  "source": "https://gamma-api.polymarket.com (public-search)"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/prediction/polymarket?limit=2&q=bitcoin'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.sitecheck-api.workers.dev/api/prediction/polymarket?limit=2&q=bitcoin' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fprediction%2Fpolymarket
const res = await pay("https://api.sitecheck-api.workers.dev/api/prediction/polymarket?limit=2&q=bitcoin");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/prediction/polymarket?limit=2&q=bitcoin")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
36 min agoPassed40261 ms$0.002
5 h agoPassed402126 ms$0.002
9 h agoPassed40242 ms$0.002
14 h agoPassed40256 ms$0.002
18 h agoPassed40245 ms$0.002
Show 1 older checks
22 h agoPassed40257 ms$0.002