ToolVet
78trust / 100

Pm Orderbook

by SiteCheck in Markets & finance

x402 APIPassing, checked 52 min ago

Fetches resting order book depth for a Polymarket outcome token (or market slug and outcome name). Returns top 20 bids and asks, midpoint price, spread, depth within 1/2/5 cents, and last trade price. Information only, not financial advice.

GET
https://api.sitecheck-api.workers.dev/api/pm/orderbook
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
35 ms
704 ms slowest 5%
Last check
Passed
52 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 · Watch with other listings

How to call it

GET https://api.sitecheck-api.workers.dev/api/pm/orderbook

Each call costs $0.003 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/pm/orderbook?tokenId=98961942092312242488092499568359433586418736677157512843097593070222397872380

Parameters

ParameterTypeRequiredDescription
outcomestringNoOutcome name (e.g. Yes or No) when slug is provided
slugstringNoMarket slug if tokenId is unknown
tokenIdstringYesOutcome CLOB token ID (numeric string)

Example response

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

Example response, 50 lines
{
  "asks": [
    {
      "price": 0.64,
      "size": 577
    },
    {
      "price": 0.65,
      "size": 2691.99
    },
    {
      "price": 0.66,
      "size": 1261.03
    }
  ],
  "asksCount": 16,
  "bestAsk": 0.64,
  "bestBid": 0.63,
  "bids": [
    {
      "price": 0.63,
      "size": 362.87
    },
    {
      "price": 0.62,
      "size": 812.33
    },
    {
      "price": 0.61,
      "size": 100
    }
  ],
  "bidsCount": 24,
  "checkedAt": "2026-10-15T18:21:04.652Z",
  "depth": {
    "asksWithin1Cent": 3268.99,
    "asksWithin2Cents": 4530.0199999999995,
    "asksWithin5Cents": 4810.0199999999995,
    "bidsWithin1Cent": 1175.2,
    "bidsWithin2Cents": 1275.2,
    "bidsWithin5Cents": 1747.0700000000002
  },
  "disclaimer": "Information only, not financial advice.",
  "lastTradePrice": 0.39,
  "market": "0xadebf2aec917971a733f74c66387529b3347ebf0f3019410427921d28e921beb",
  "mid": 0.635,
  "source": "Polymarket CLOB API (clob.polymarket.com/book)",
  "spread": 0.01,
  "tokenId": "98961942092312242488092499568359433586418736677157512843097593070222397872380"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

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/pm/orderbook?tokenId=98961942092312242488092499568359433586418736677157512843097593070222397872380'

# 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/pm/orderbook?tokenId=98961942092312242488092499568359433586418736677157512843097593070222397872380' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fpm%2Forderbook
const res = await pay("https://api.sitecheck-api.workers.dev/api/pm/orderbook?tokenId=98961942092312242488092499568359433586418736677157512843097593070222397872380");
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
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/pm/orderbook?tokenId=98961942092312242488092499568359433586418736677157512843097593070222397872380")
    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
52 min agoPassed402704 ms$0.003
5 h agoPassed40235 ms$0.003