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skills.onesource.io Ethereum Proxy Pattern Detector
x402
skills.onesource.io Ethereum Proxy Pattern Detector is a paid API for AI agents from skills.onesource.io, paid per call via x402, $0.005000/call, status unknown (last checked 2026-10-12).
Detects whether an Ethereum address is a proxy contract and identifies its pattern (EIP-1967, UUPS, Transparent/slot0) along with the implementation address
Price / call$0.005000
Success—
StatusUnknown
How this service works
Detect proxy patterns (EIP-1967, UUPS, Transparent) via eth_getStorageAt
Output
Returns an object with: the queried address, a boolean is_proxy indicating if it's a proxy, the proxy_type (e.g. 'slot0', 'EIP-1967', 'UUPS', 'Transparent', or 'none'), a boolean is_contract confirming the address is a contract, and the implementation address if applicable. Also includes metadata with endpoint and request_id.
Example use cases
Example prompt
“Is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 a proxy contract on Ethereum mainnet, and if so what proxy pattern does it use and what's the implementation address behind it?”
Technical details
Endpoint
GEThttps://skills.onesource.io/api/chain/proxy/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to determine if a smart contract is upgradeable and identify its proxy architecture pattern via low-level storage slot inspection (eth_getStorageAt). Prefer this over generic contract info endpoints when the specific proxy type and implementation address are needed for security auditing, contract interaction routing, or DeFi due diligence.
Side effects
- Invalid address format (not a valid 0x hex address) — returns validation error
- Address is an EOA (externally owned account), not a contract — is_contract: false, is_proxy: false
- Unsupported network specified — enum validation error
- RPC timeout or node unavailability — upstream error
- Non-proxy contract — returns is_proxy: false with no implementation address
Input
{
"input": {
"type": "http",
"method": "GET"
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"address": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
"is_proxy": true,
"proxy_type": "slot0",
"is_contract": true,
"implementation": "0xfcb19e6a322b27c06842a71e8c725399f049ae3a"
},
"meta": {
"endpoint": "/api/chain/proxy/0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
"request_id": "e7b4fdd7fd7827aa"
}
}Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | object | |
| metarequired | object |
Tags
x402
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