# x402pulse Polymarket Whale Trades

> x402pulse Polymarket Whale Trades is a paid API for AI agents from www.x402pulse.dev, paid per call via x402, $0.0175/call, status unknown (last checked 2026-10-12).

Returns the largest recent Polymarket trades above a user-specified USD size, with trader name, outcome, price, and trade size, excluding short-term crypto markets.

## Facts

- Endpoint: GET https://www.x402pulse.dev/v1/whales?utm_source=zero.xyz
- Price: $0.0175/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402pulse-polymarket-whale-trades-9821f56e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xe8nyoeu3-gs9Gw-BvIy-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402pulse-polymarket-whale-trades-9821f56e
```

Example prompt: Show me the 20 biggest Polymarket trades right now where each trade is at least $5,000 — I want to see which whales are buying or selling and on what outcomes.

## When to prefer this

Use this endpoint when you want to identify large, informed trades on Polymarket specifically — not aggregated prediction market data. It is ideal for surfacing smart-money signals, tracking whale sentiment, or pairing with the /v1/wallet endpoint to evaluate whether a whale trader has a strong track record. Prefer this over generic market-data APIs when you need trader-level attribution and USD-denominated trade sizes with outcome context.

## Known failure modes

- No trades found above the specified minimum size — reduce the min parameter
- limit out of range (must be 1–50) — returns validation error
- Missing or malformed query parameters — returns 400 error
- Payment failure or insufficient USDC — returns 402 Payment Required
- Service temporarily unavailable — returns 5xx error

## How this service works

Polymarket whale trades: the largest recent buys and sells across all markets above a size you choose, with trader name, outcome, price and USD size. 5- and 15-minute crypto markets filtered out. Pair with /v1/wallet to check whether a whale is any good.

## Output

A list of up to 50 of the largest recent Polymarket trades, each including trader name, market, outcome, price, and USD trade size, excluding 5- and 15-minute crypto markets. Results are ordered by trade size descending.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "min": {
       "type": "string",
       "description": "Minimum trade size in USD"
      },
      "limit": {
       "type": "string",
       "description": "Number of trades, 1 to 50"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "minUsd": 1000,
   "trades": [
    {
     "usd": 12400,
     "name": "Theo4",
     "side": "BUY",
     "slug": "example-market",
     "time": "2026-10-01T12:00:00.000Z",
     "price": 0.62,
     "market": "Example market?",
     "wallet": "0x56687bf447db6ffa42ffe2204a05edaa20f55839",
     "outcome": "Yes"
    }
   ]
  },
  "cached": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402pulse-polymarket-whale-trades-9821f56e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.x402pulse.dev](https://www.zero.xyz/host/www.x402pulse.dev/llms.txt)