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Ethereum Wallet Shared Counterparty / Sybil Airdrop Farmer Check
x402
Ethereum Wallet Shared Counterparty / Sybil Airdrop Farmer Check is a paid API for AI agents from api.fadeandco.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Checks 2–10 Ethereum wallets for shared counterparties across recent transactions to detect possible Sybil clusters or coordinated airdrop farming
Price / call$0.002
Success—
StatusUnknown
How this service works
Checks 2 to 10 Ethereum wallets for shared counterparties: addresses that several of them sent to or received from in their most recent 50 transactions (Blockscout). Reports the shared addresses and a POSSIBLE_CLUSTER signal. Recent-page only, no funding-source trace, so it finds some clusters and misses others.
Output
Returns a JSON object with a verdict (POSSIBLE_CLUSTER or NO_SHARED_COUNTERPARTY), a list of shared counterparty addresses found across the submitted wallets, the count of shared counterparties, per-wallet metadata (transactions scanned, whether older pages exist), the Blockscout data source URL, a timestamp, and a note that shared addresses may be exchanges or routers rather than proof of coordination.
Example use cases
Airdrop Sybil screening before distribution
“Before we send out our token airdrop, can you check these six wallet addresses for me — 0xAAA..., 0xBBB..., 0xCCC..., 0xDDD..., 0xEEE..., 0xFFF... — and flag any that share counterparties? I'm trying to catch Sybil farmers before they claim.”
Investigating suspected coordinated wallets
“I'm looking into these three Ethereum addresses that all applied for our whitelist: 0x111..., 0x222..., 0x333.... Can you check if they share any common transaction counterparties that might indicate they're run by the same person?”
On-chain due diligence for a multi-wallet investor
“We've got two investor wallet addresses — 0xd8da6bf26964af9d7eed9e03e53415d37aa96045 and 0xfbfeaf0da0f2fde5c66df570133ae35f3eb58c9a — and I want to know if they're secretly connected by shared on-chain counterparties before we finalize the cap table.”
Technical details
Endpoint
GEThttps://api.fadeandco.workers.dev/api/agent-intel/sybil-airdrop-farmer-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, lightweight Sybil or cluster signal across 2–10 Ethereum wallets based on shared recent counterparties — ideal for pre-airdrop screening, whitelist vetting, or quick on-chain relationship checks. Prefer it over full graph-tracing tools when you want a rapid lead rather than a deep funding-source trace, and when you're comfortable with recent-transaction-only coverage. Not suited for deep historical analysis or tracing the origin of funds.
Side effects
- Fewer than 2 or more than 10 wallets provided — request rejected
- Invalid Ethereum address format causes API error or empty result
- Blockscout API unavailability leads to timeout or error response
- Only the most recent 50 transactions per wallet are scanned — older coordination activity is missed
- Shared counterparties may be high-volume contracts (DEX routers, exchanges) producing false-positive cluster signals
- Wallets with very few transactions may produce inconclusive results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Only the most recent 50 transactions per wallet. A shared address can be an exchange or a router, so a signal is a lead, not proof.",
"source": "https://eth.blockscout.com/api/v2/addresses/",
"verdict": "NO_SHARED_COUNTERPARTY",
"wallets": [
{
"address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
"olderPagesExist": true,
"transactionsScanned": 50
},
{
"address": "0xfbfeaf0da0f2fde5c66df570133ae35f3eb58c9a",
"olderPagesExist": true,
"transactionsScanned": 50
}
],
"checkedAt": "2026-10-23T09:35:18.663Z",
"sharedCounterparties": [],
"sharedCounterpartyCount": 0
}
}Tags
x402
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