# Sift Web Tools – EVM Contract Inspector

> 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).

## Facts

- Endpoint: GET https://sift.srv1996466.hstgr.cloud/v1/crypto/contract?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sift-web-tools-evm-contract-inspector-f8ae94a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HAp8zYYj0QRCXIj19kQb0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sift-web-tools-evm-contract-inspector-f8ae94a6
```

Example prompt: Can you check this contract on Base — 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — and tell me if it's a proxy, who owns it, whether it's source-verified on Sourcify, and whether it has mint or upgrade capabilities?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "Chain (default base)"
      },
      "address": {
       "type": "string",
       "description": "Contract address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sift-web-tools-evm-contract-inspector-f8ae94a6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sift.srv1996466.hstgr.cloud](https://www.zero.xyz/host/sift.srv1996466.hstgr.cloud/llms.txt)