{"uid":"cap_amx244OS0VuHL90SaLEol","slug":"graphadvocate-com-7ca98fbb","name":"Polymarket Ghost-Fill Counterparty Risk Scorer","description":"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.","url":"https://graphadvocate.com/polymarket/risk","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"wallet":{"type":"string"}}},"responseSchema":{"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}}},"example":{"request":{"wallet":"0x1234567890abcdef1234567890abcdef12345678"},"response":{"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"}},"exampleRequest":{"wallet":"0x1234567890abcdef1234567890abcdef12345678"},"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IQlTsiZHFG6QM6URPUTkQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Assesses ghost-fill counterparty risk for a Polymarket wallet, classifying wallet type and flagging 24h collateral outflow for adverse selection pricing.","exampleAgentPrompt":"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.","exampleUseCases":null,"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:33:24.145Z","isFirstParty":false}