Pricing

from $0.10 / actor start

Smart Contract Audit

Analyze Ethereum smart contracts for security vulnerabilities. Input a verified contract address, get a JSON risk report with findings, risk score, and recommendations. Supports 7 EVM chains. Detects reentrancy, delegatecall exploits, unchecked calls, and 12 more vulnerability patterns.

Pricing

from $0.10 / actor start

Rating

0.0

(0)

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Monthly active users

2 days ago

Last modified

Smart Contract Security Audit API

Automated security analysis for Ethereum smart contracts. Input a verified contract address, get a structured JSON risk report with vulnerability findings, risk score, and remediation recommendations.

What it does

This Actor fetches verified Solidity source code from Etherscan and runs static vulnerability analysis covering 15+ common vulnerability patterns including:

Critical: Reentrancy, delegatecall to untrusted targets, selfdestruct
High: tx.origin auth, unchecked call returns, unprotected withdrawals
Medium: Integer overflow (unchecked blocks), timestamp dependence, front-running
Low: Floating pragma, missing events, magic numbers
Info: Centralization risk, assembly usage, unresolved TODOs

Key features

Multi-chain support: Ethereum, Polygon, Arbitrum, Optimism, Base, BSC, Avalanche
Proxy-aware: Automatically detects proxy contracts and audits the implementation
Risk scoring: 0–10 risk score with severity-weighted computation
Zero setup: No servers, no API keys needed (Etherscan key optional for higher rate limits)

Input

Field	Type	Required	Description
`contractAddress`	string	Yes	Verified contract address (0x...)
`chainId`	integer	No	Chain ID (default: 1 for Ethereum)
`etherscanApiKey`	string	No	Etherscan API key for higher rate limits
`severityThreshold`	string	No	Minimum severity to report (default: "info")

Output

{
  "status": "completed",
  "contract_address": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
  "chain": "Ethereum",
  "contract_name": "TetherToken",
  "risk_score": 5.2,
  "risk_level": "medium",
  "vulnerability_count": 7,
  "severity_summary": { "high": 1, "medium": 3, "low": 2, "info": 1 },
  "contract_metadata": {
    "solidity_version": "^0.4.18",
    "total_lines": 435,
    "uses_openzeppelin": false
  },
  "findings": [
    {
      "id": "REENTRANCY",
      "name": "Reentrancy Vulnerability",
      "severity": "critical",
      "description": "...",
      "recommendation": "...",
      "mitigated": false,
      "instances": [{ "line": 142, "code": "..." }],
      "instance_count": 2
    }
  ]
}

Use cases

DeFi developers: Quick security check before deploying or interacting with contracts
Security researchers: Triage tool to identify contracts worth deeper manual review
Portfolio managers: Automated risk assessment of DeFi protocols
Monitoring pipelines: Integrate via Apify API to scan new contracts as they're verified

Pricing

This Actor uses minimal compute — a typical audit takes 2–5 seconds and costs fractions of a cent in Apify platform credits. No external API costs beyond the free Etherscan tier.

Limitations

This is a static analysis tool and does not replace a professional audit. It detects common vulnerability patterns but cannot reason about complex business logic, cross-contract interactions, or economic exploits. Use it as a first-pass triage, not a final verdict.

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