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Polymarket Ghost-Fill Counterparty Risk Scorer
x402
Polymarket Ghost-Fill Counterparty Risk Scorer is a paid API for AI agents from graphadvocate.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Assesses ghost-fill counterparty risk for a Polymarket wallet, classifying wallet type and flagging 24h collateral outflow for adverse selection pricing.
Price / call$0.02
Success—
StatusUnknown
How this service works
Polymarket ghost-fill counterparty risk. POST {wallet}. Returns wallet_type (eoa | smart_account_erc1967 | legacy_smart_account), ghost_fill_risk (low/medium/high), 24h collateral outflow flag. Deposit wallets (POLY_1271, sig type 3) are ghost-fill-immune by design. For MM agents pricing adverse selection before quoting against a maker.
Output
Returns wallet_type (eoa, smart_account_erc1967, or legacy_smart_account), ghost_fill_risk rating (low/medium/high), and a 24h collateral outflow flag. Deposit wallets using POLY_1271 signature type 3 are identified as ghost-fill-immune by design.
Example use cases
Example prompt
“Before I quote against this Polymarket maker, check the ghost-fill counterparty risk for wallet 0x1234abcd...5678 — I need to know the wallet type, whether the risk is low, medium, or high, and if there's been any collateral outflow in the last 24 hours.”
Technical details
Endpoint
POSThttps://graphadvocate.com/polymarket/riskWhen to prefer
Use this endpoint when a market-making agent needs to price adverse selection risk before quoting against a specific Polymarket maker wallet, particularly to detect ghost-fill exposure, classify wallet architecture, and catch wallets with recent collateral outflows that signal elevated risk.
Side effects
- Invalid or unrecognized wallet address returns an error
- Wallet with no Polymarket activity may return insufficient data
- Network or subgraph indexing lag may cause stale risk assessment
- Malformed POST body returns 400-level error
Input
{
"wallet": "0x1234567890abcdef1234567890abcdef12345678"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| wallet | string |
Output
{
"reason": "Owner EOA — legacy CLOB signing path. Highest historical ghost-fill incidence.",
"wallet": "0x1234567890abcdef1234567890abcdef12345678",
"methodology": {
"docs": "https://docs.polymarket.com — Deposit Wallet Migration",
"wallet_type": "Polygon eth_getCode + ERC-1967 implementation slot probe. EOA = no bytecode. ERC-1967 proxy ≈ Polymarket deposit wallet (POLY_1271, sig type 3). Other contract bytecode = legacy proxy/Safe.",
"ghost_fill_link": "Deposit wallets validate orders via ERC-1271 against on-chain state at fill time, eliminating the balance/allowance drift that produces ghost fills on the legacy EOA/proxy/Safe path."
},
"wallet_type": "eoa",
"generated_at": "2026-05-30T00:20:07.104929+00:00",
"impl_address": null,
"ghost_fill_risk": "high"
}Schema · Response
{
"type": "json",
"example": {
"reason": "ERC-1967 proxy wallet. Likely Polymarket deposit wallet — ghost-fill-immune by design.",
"wallet": "0x38e5...",
"wallet_type": "smart_account_erc1967",
"impl_address": "0x...",
"ghost_fill_risk": "low",
"recent_outflow_24h": {
"flag": false,
"events_24h": 0
}
}
}Tags
x402
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