Sift Web Tools – EVM Contract Inspector

x402

Sift Web Tools – EVM Contract Inspector is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-20).

Inspects any EVM smart contract to detect proxy type (EIP-1967/EIP-1167), implementation address, owner, Sourcify verification status, and capability flags (mint, pause, blacklist, burn, upgrade).

Price / call$0.005

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StatusUnknown

How this service works

Contract check: proxy type, implementation, owner, verified source, capability flags. Inspects any EVM contract: detects EIP-1967 and EIP-1167 proxies and their implementation, reads the owner, checks Sourcify verification, and lists capabilities (mint, pause, blacklist, burn, upgrade) from the logic contract's bytecode.

Output

Returns a JSON object containing: is_proxy (boolean), proxy_kind (e.g. 'EIP-1967 transparent/UUPS proxy'), implementation address if proxied, owner address (or null), source_verified (boolean from Sourcify), and features object with boolean flags for can_mint, can_pause, can_blacklist, can_burn, and can_upgrade.

Example use cases

DeFi contract safety audit

“Before I interact with this contract at 0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9 on Ethereum mainnet, can you tell me if it's a proxy, what the implementation is, who owns it, and whether it has any dangerous capabilities like blacklisting or pausing?”

Proxy implementation discovery

“I'm auditing this contract — 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48 on base — can you detect whether it's an EIP-1967 or EIP-1167 proxy and resolve its actual implementation address?”

Token contract capability check

“Can you scan this token contract 0x6B175474E89094C44Da98b954EedeAC495271d0F on base and tell me if it has mint, burn, pause, or upgrade functions I should be aware of, and whether the source code is verified?”

Technical details

Endpoint

GEThttps://sift.srv1996466.hstgr.cloud/v1/crypto/contract?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, comprehensive contract security snapshot — especially when you want proxy detection, owner lookup, and capability flags in a single call rather than querying multiple on-chain methods or block explorers. It is particularly useful for pre-interaction due diligence on DeFi protocols, token contracts, or any upgradeable contract pattern. Prefer it over raw RPC calls when you need Sourcify verification status bundled with bytecode capability analysis.

Side effects

Invalid or non-existent contract address returns an error or empty result
Unsupported chain identifier causes a bad request response
Contract with no detectable proxy pattern returns is_proxy: false with no implementation
Unverified contracts may have incomplete capability detection since bytecode analysis is approximate
Network timeouts or RPC failures on the target chain may return a 503 or error response
Non-contract address (EOA wallet) may return null or error for contract-specific fields

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "owner": null,
    "features": {
      "can_mint": true
    },
    "is_proxy": true,
    "proxy_kind": "EIP-1967 transparent/UUPS proxy",
    "source_verified": true
  }
}

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