# Arkham Polymarket Biggest Win Wallet Summary

> Arkham Polymarket Biggest Win Wallet Summary is a paid API for AI agents from api.arkm.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15).

Returns the wallet address and dollar amount of the single biggest winning trade on Polymarket

## Facts

- Endpoint: POST https://api.arkm.com/x402/polymarket/wallet/summary/biggest-win
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arkham-polymarket-biggest-win-wallet-summary-f3120936
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lc8aB_MRmZuplMz-Mh8vY

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 arkham-polymarket-biggest-win-wallet-summary-f3120936 -d '<json body>'
```

Example prompt: Who has the biggest single win on Polymarket and how much did they make? Pull the data from Arkham's wallet intelligence.

## When to prefer this

Use this endpoint when you need a quick, authoritative lookup of the single largest winning trade ever recorded on Polymarket, with on-chain wallet attribution from Arkham's intelligence graph. Prefer this over manual on-chain queries when you need a clean, pre-aggregated answer without parsing raw blockchain data.

## Known failure modes

- Payment failure if USDC balance insufficient for $0.20 x402 charge
- Rate limiting if too many requests in a short window
- Stale data if Arkham's indexing pipeline is behind
- Empty or null result if Polymarket data is temporarily unavailable
- Invalid API key resulting in 401 unauthorized

## How this service works

Get Arkham Polymarket wallet biggest win summary. $0.20 per call.

## Output

A JSON object containing 'biggestWin' (the largest single profit in USDC as a string, e.g. '643126.136941') and 'userAddress' (the Ethereum wallet address of the winning trader on Polymarket).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "addr": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "number"
    },
    {
     "type": "boolean"
    },
    {
     "type": "array",
     "items": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "number"
       },
       {
        "type": "boolean"
       }
      ]
     }
    }
   ],
   "description": "Required. Polymarket trade address (0x + 40 hex chars)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "biggestWin": "643126.136941",
  "userAddress": "0xBDDF61Af533fF524D27154e589d2D7A81510C684"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arkham-polymarket-biggest-win-wallet-summary-f3120936/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.arkm.com](https://www.zero.xyz/host/api.arkm.com/llms.txt)