ToolVet
75trust / 100

Polymarket Screen

by graphadvocate.com in Markets & finance

x402 APIPassing, checked 5 h ago

Size-the-room: top N holders of a Polymarket market ranked by skill_score, with per-holder ghost-fill risk. POST {condition_id, n?}. The pre-trade check for trading and market-maker agents — answers 'who am I about to be against, and will their fills actually settle?'

POST
https://graphadvocate.com/polymarket/screen
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
265 ms
370 ms slowest 5%
Last check
Passed
5 h ago, next in 43 min

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

POST https://graphadvocate.com/polymarket/screen

Each call costs $0.02 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.

POST https://graphadvocate.com/polymarket/screen
content-type: application/json

{
  "condition_id": "0x6331a779482df72d904c3c1e12b6409ff836bc06f8c97945cba9b25ada2c605c",
  "n": 10
}

Parameters

ParameterTypeRequiredDescription
condition_idstringYesPolymarket condition_id (0x + 64 hex chars)
nintegerNo Default: 10.

Example response

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

{
  "condition_id": "0x6331...",
  "ghost_fill_risk_breakdown": {
    "high": 1,
    "low": 6,
    "medium": 3
  },
  "holders": [
    {
      "classification": "sharp",
      "ghost_fill_risk": "low",
      "position_value_usdc": 9005.64,
      "rank": 1,
      "side": "Yes",
      "skill_score": 71.4,
      "wallet": "0x38e5...",
      "wallet_type": "smart_account_erc1967"
    }
  ],
  "holders_screened": 10,
  "insufficient_data_count": 1,
  "neutral_count": 2,
  "retail_count": 4,
  "sharp_count": 3
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://graphadvocate.com/polymarket/screen' \
  -H 'content-type: application/json' \
  --data-raw '{"condition_id":"0x6331a779482df72d904c3c1e12b6409ff836bc06f8c97945cba9b25ada2c605c","n":10}'

# 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 - -X POST 'https://graphadvocate.com/polymarket/screen' \
  -H 'content-type: application/json' \
  --data-raw '{"condition_id":"0x6331a779482df72d904c3c1e12b6409ff836bc06f8c97945cba9b25ada2c605c","n":10}' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgraphadvocate.com%2Fpolymarket%2Fscreen&method=POST
const res = await pay("https://graphadvocate.com/polymarket/screen", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "condition_id": "0x6331a779482df72d904c3c1e12b6409ff836bc06f8c97945cba9b25ada2c605c",
    "n": 10
  }),
});
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://graphadvocate.com/polymarket/screen",
        json={
            "condition_id": "0x6331a779482df72d904c3c1e12b6409ff836bc06f8c97945cba9b25ada2c605c",
            "n": 10,
        },
    )
    print(res.status_code, res.text)

Security scan

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