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Arkham x402 – Polymarket Positions
x402
Arkham x402 – Polymarket Positions is a paid API for AI agents from api.arkm.com, paid per call via x402, $0.6/call, status unknown (last checked 2026-09-15).
Returns a wallet's open Polymarket prediction-market positions including net flow, unrealized P&L, last price, and trade count, charged per-request via x402 micropayment.
Price / call$0.6
Success—
StatusUnknown
How this service works
Get Arkham Polymarket positions for a wallet. $0.60 per call.
Output
Returns a JSON object containing an array of position objects — each with the event ID, outcome label, market question, image URL, last traded price, net USDC flow, net position size, total trade count, condition ID, token address, and unrealized P&L — plus a total count and the queried wallet address.
Example use cases
Track a whale's prediction market bets
“Look up the Polymarket positions for wallet 0xBDDF61Af533fF524D27154e589d2D7A81510C684 and tell me which events they're betting on, how large their positions are, and whether they're up or down on each.”
Monitor trader's sports market exposure
“I want to see every open sports market position that address 0xBDDF61Af533fF524D27154e589d2D7A81510C684 holds on Polymarket, including the last price and total number of trades they've made on each.”
Audit a wallet's Polymarket P&L
“Check what Polymarket markets wallet 0xBDDF61Af533fF524D27154e589d2D7A81510C684 is currently in and show me the unrealized P&L and net USDC flow for each position so I can assess their overall profitability.”
Technical details
Endpoint
POSThttps://api.arkm.com/x402/polymarket/positionsWhen to prefer
Use this endpoint when you specifically need on-chain Polymarket position data attributed to a known wallet address, including financial metrics like unrealized P&L and net USDC flow. Prefer this over generic Polymarket APIs when you need Arkham's wallet intelligence layer (address labeling, entity attribution) combined with position data, and when pay-per-request x402 billing is acceptable over a subscription model.
Side effects
- Invalid or malformed wallet address returns an error or empty positions array
- Wallet has no Polymarket activity — returns positions array with zero items and totalCount 0
- Insufficient x402 payment (under $0.60 USDC) causes request to be rejected with a 402 Payment Required response
- Rate limiting or network errors on the Arkham API side may return 5xx errors
- Querying a non-Ethereum or unsupported address format may produce an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| addr | — | Required. Polymarket trade address (0x + 40 hex chars). |
| limit | — | Max results (default 50, max 1000). |
| offset | — | Offset for pagination (default 0). |
| sortBy | — | Column to order by: trades (default), shares, value, pnl. |
| sortOrder | — | Sort direction: asc or desc (default). |
Output
Schema · Response
{
"type": "json",
"example": {
"positions": [
{
"eventId": 544680,
"outcome": "Boston Red Sox",
"imageUrl": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
"question": "Boston Red Sox vs. New York Yankees",
"lastPrice": 0.495,
"conditionId": "0x0bbc63372aaf0867db23fc361b4e37f7d3125c7acef6cc8e2d5ce40f65b7e523",
"netFlowUsdc": "-34690.684786",
"netPosition": "72272.25996",
"totalTrades": 31,
"tokenAddress": "0x535fa6646d139e4b4400ccece2b6d34c1a7d925602f58a5add648030c6f3378f",
"unrealizedPnl": "1084.0838942"
},
{
"eventId": 544680,
"outcome": "Under",
"imageUrl": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
"question": "Boston Red Sox vs. New York Yankees: O/U 8.5",
"lastPrice": 0.54,
"conditionId": "0x717c526bb6a5946f75423352cdbd0d92ab87651710a7740997126d58b3a7925d",
"netFlowUsdc": "-40596.758127",
"netPosition": "79601.486519",
"totalTrades": 16,
"tokenAddress": "0x15e06d413ac75c0e88e7c0292cfdbf8b767273081f43cb146143dbc5a68ea6dc",
"unrealizedPnl": "2388.04459326",
"groupItemTitle": "O/U 8.5"
}
],
"totalCount": 5,
"userAddress": "0xBDDF61Af533fF524D27154e589d2D7A81510C684"
}
}Tags
x402
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