$0.15
per call · USD Coin on Base
Live whale-tracking on Polymarket: the latest large trades (default >= 5000 USD, tunable via min_usd) with wallet, side, outcome, size, price, USD value, market title/slug and tx hash, straight from Polymarket public trades data API. Built for prediction-market agents that track smart money before trading. No charge on service failure. Ed25519-signed. $0.15 USDC per call via x402 on Base. Free trial: 3 calls per wallet with header X-WALLET.
Endpoint
POST https://api.hergertsynthora.com/v1/polymarket-whales1
Calls / 30d
1
Unique payers / 30d
Aug 19
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://api.hergertsynthora.com/v1/polymarket-whales", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"limit": 20,
"min_usd": 10000,
"side": "all"
}),
});
const data = await res.json();curl -X POST \
"https://api.hergertsynthora.com/v1/polymarket-whales" \
-H "Content-Type: application/json" \
-d '{"limit":20,"min_usd":10000,"side":"all"}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"niche": "polymarket_whales",
"ok": true,
"result": {
"count": 20,
"min_usd": 10000,
"top_markets_by_whale_usd": [],
"total_usd": 250000,
"unique_wallets": 14,
"whale_trades": [
{
"market": "...",
"market_slug": "...",
"outcome": "Yes",
"price": 0.62,
"side": "BUY",
"size": 10000,
"timestamp_utc": "...",
"tx": "0x...",
"usd_value": 6200,
"wallet": "0x..."
}
]
}
}Payment details
0x10800a5a5b9d72251566ec651e862a8b4b427de0USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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