Crypto Hawking Free AI Audit
Founder · Solidity Engineer · LLM Prompt Engineering
https://www.cryptohawking.com/audit ↗Challenge
The smart-contract audit industry is a $1.5B+/year market where the cheapest professional audit costs $30,000. The bottom 99% of Solidity developers — solo devs, hackathon teams, students, pre-mainnet startups — have no access to professional security review.
The result: $4B+ stolen from Solidity smart contracts in 2023-2024 alone. Almost all from contracts that were never professionally audited because the developers couldn't afford one.
The engineering problem was building an audit tool that produced output indistinguishable from a junior auditor at a Big-4 firm, but at a unit cost low enough to give away for free. That meant solving four problems simultaneously: (1) accurate vulnerability detection across the SWC registry, (2) production-grade PDF report generation, (3) 60+ EVM chain source-code retrieval, and (4) per-audit cost under $0.10.
Approach
Built on Anthropic's Claude Opus 4.7 with a custom system prompt engineered against the SWC vulnerability registry plus modern issues (oracle manipulation, flash-loan attacks, upgradeable-contract pitfalls, MEV exposure, signature replay).
**Cost engineering.** The system prompt — roughly 5,000 tokens of SWC catalog, severity rubric, and JSON schema — is identical across every audit. Anthropic prompt-caching reduces the input cost on that block to ~10% of standard pricing. Average audit cost: $0.03–$0.12 per run.
**Three input modes.** Paste source, upload `.sol` file, or paste any EVM explorer URL. The explorer mode uses Etherscan V2's unified API (one key, 60+ chains) — Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche, Fantom, zkSync Era, Linea, Scroll, and more.
**Output as PDF.** Industry-standard audit-report PDF generated via `@react-pdf/renderer` — cover page, executive summary, severity-distribution chart, per-finding sections with code snippets, gas-optimization recommendations, and a final upgrade-path page. Emailed to the user via Resend.
**Monetization via the upgrade tier.** Every report ends with a $5,000 manual-audit upsell — a senior human review, paid in crypto (ETH/SOL/USDT), delivered in 3 business days. The free tier pays for itself via the paid tier; the paid tier is profitable from day one.