ToolVet
80trust / 100

Prediction Builders

by api.seerium.xyz in Markets & finance

x402 APIPassing, checked 1 h ago

Polymarket API for builder stats. Ranks prediction market creators by volume, active users, verification, and period comparisons.

GET https://api.seerium.xyz/v1/prediction/builders

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Status and outage history · Atom feed

Uptime
100%
Response time
167 ms typical, 260 ms slowest 5%
Last check
1 h ago
Next check
any minute now

How to call it

GET https://api.seerium.xyz/v1/prediction/builders

Each call costs $0.1 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.seerium.xyz/v1/prediction/builders?limit=25&offset=0&timePeriod=MONTH

Parameters

ParameterTypeRequiredDescription
limitnumberNoOptional maximum ranked Polymarket builders to return. Defaults to 50.
offsetnumberNoOptional pagination offset. Defaults to 0.
timePeriodstringNoOptional Polymarket builder ranking period. Defaults to MONTH. One of: DAY, WEEK, MONTH, ALL.

Example response

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

Example response, 68 lines
{
  "data": {
    "builders": [
      {
        "activeUsers": 420,
        "builder": "Example Builder",
        "builderLogo": null,
        "dt": "2026-03-25T00:00:00.000Z",
        "rank": 1,
        "verified": true,
        "volume": 1250000,
        "volumePerActiveUser": 2976.19,
        "volumeShare": 0.2976
      }
    ],
    "criteria": {
      "limit": 25,
      "offset": 0,
      "timePeriod": "MONTH"
    },
    "nextOffset": null,
    "summary": {
      "activeUsers": 1800,
      "builderCount": 24,
      "medianVolumePerUser": 1800,
      "period": "MONTH",
      "topBuilder": "Example Builder",
      "topBuilderShare": 0.2976,
      "topBuilderVolume": 1250000,
      "totalVolume": 4200000,
      "verifiedCount": 12
    },
    "total": 24,
    "updatedAt": "2026-03-25T11:59:30.000Z"
  },
  "meta": {
    "freshnessMs": 30000,
    "generatedAt": "2026-03-25T12:00:00.000Z",
    "requestId": "req_example_123",
    "updatedAt": "2026-03-25T11:59:30.000Z"
  },
  "product": {
    "accepts": [
      {
        "network": "eip155:8453",
        "payTo": "0x81832eEDe3a4ad96CB3D7cA09977636D912fd3D5",
        "price": "$0.1000",
        "scheme": "exact"
      },
      {
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "2h752kAbb9z1jpdSzqMEYg9JHv6TPJ6T2BfAJMyjLFtZ",
        "price": "$0.1000",
        "scheme": "exact"
      }
    ],
    "id": "polymarket-builder-stats",
    "method": "GET",
    "name": "Polymarket Builder Stats API",
    "networks": [
      "eip155:8453",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
    ],
    "path": "/v1/prediction/builders",
    "price": "$0.1000"
  },
  "service": "seerium-x402-api"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.1.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.seerium.xyz/v1/prediction/builders?limit=25&offset=0&timePeriod=MONTH'

# 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.seerium.xyz/v1/prediction/builders?limit=25&offset=0&timePeriod=MONTH' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.seerium.xyz%2Fv1%2Fprediction%2Fbuilders
const res = await pay("https://api.seerium.xyz/v1/prediction/builders?limit=25&offset=0&timePeriod=MONTH");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
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.seerium.xyz/v1/prediction/builders?limit=25&offset=0&timePeriod=MONTH")
    print(res.status_code, res.text)

Security scan

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Recent checks

WhenResultHTTPTimePrice
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