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Check if a token is a scam before you buy
Free, fast, and accurate honeypot detection for Ethereum, Polygon, and Arbitrum smart contracts.
We hunt honeypots. A honeypot token is a malicious smart contract designed to steal your money. It lets you buy tokens freely, but when you try to sell—your transaction fails. Your funds are trapped forever.
Scammers embed hidden logic in the token's smart contract code:
- Sell blockers - Only whitelisted addresses (the scammer) can sell
- Hidden taxes - 95-100% sell tax drains your tokens
- tx.origin tricks - Contract checks if you're the original buyer and blocks resale
- Dynamic blacklists - Your address gets blacklisted after buying
- 💸 Total loss of funds - Once trapped, there's no way out
- 🎭 Fake legitimacy - Honeypots often mimic real projects with copied websites and social media
- ⚡ Speed - Scammers launch, pump, and abandon tokens within hours
- 📈 Rising threat - Thousands of new honeypot tokens are deployed daily
HoneypotScan is specialized for honeypot detection only. We do not scan for:
- Reentrancy vulnerabilities
- Flash loan exploits
- Ownership/admin risks
- Liquidity rug pulls
- Other smart contract vulnerabilities
For comprehensive security audits, consult professional auditors. HoneypotScan answers one question: "Can I sell this token after I buy it?"
- 🚀 Instant Results - Scan in 2 seconds
- 🌐 Multi-chain - Ethereum, Polygon, Arbitrum
- 💾 Smart Caching - 95%+ cache hit rate
- 🔒 Privacy First - No tracking, no data collection
- 💰 100% Free - No limits, no API keys needed
- 🎯 High Accuracy - Pattern-based detection with confidence scoring
- 📱 Mobile Friendly - Responsive design works on any device
- 🛡️ Enterprise Security - CSP headers, CORS whitelist, input validation
- 📚 Educational Tooltips - Learn about each detected pattern with severity levels and protection tips
- 📋 Scan History - Track your last 10 scans locally for quick reference
- 🔗 Share Results - Generate shareable URLs to send scan results to others
- 💾 Export Data - Download scan results as JSON files for record-keeping
Every detected honeypot pattern comes with detailed educational content:
- Severity Level - Critical, High, or Medium risk classification
- How It Works - Plain-English explanation of the malicious technique
- Protection Tips - Actionable advice to avoid similar scams
Example pattern explanation:
🚨 tx.origin in Require Statement (CRITICAL)
How it works: Transactions are blocked unless tx.origin matches
a specific address. DEX sells always fail because the router
becomes the msg.sender.
Protection: tx.origin checks in access control are a major red flag.
Your last 10 scans are automatically saved locally:
- Quick access to previously scanned contracts
- No server storage - complete privacy
- Includes token name, symbol, and scan timestamp
- One-click re-scan or share functionality
Share Results via URL:
https://honeypotscan.com#result=eyJhIjoiMHguLi4ifQ==
- Results encoded in URL hash (no server needed)
- Share with friends, communities, or social media
- Recipient sees full scan details instantly
Export as JSON:
{
"scanner": "HoneypotScan",
"version": "1.0",
"scannedAt": "2026-02-01T12:00:00Z",
"result": {
"address": "0x...",
"isHoneypot": true,
"confidence": 95,
"patterns": [...]
}
}Copy as Text:
🔍 HoneypotScan Result
════════════════════════════════════════
Token: Scam Token (SCAM)
Address: 0x...
Chain: Ethereum
Status: 🚨 HONEYPOT DETECTED
Confidence: 95%
⚠️ Patterns Found (3):
• tx_origin_require (line 123)
• hidden_sell_tax (line 456)
• transfer_whitelist_only (line 789)
- Traders - Verify tokens before buying on DEXs like Uniswap or SushiSwap
- Investors - Due diligence on new token launches and presales
- Developers - Audit smart contracts for common honeypot patterns
- Communities - Protect group members from scam tokens
- Researchers - Analyze honeypot trends across different chains
HoneypotScan offers two scanning modes for maximum flexibility:
Paste any contract address to check if it's a honeypot. Works with Ethereum, Polygon, and Arbitrum addresses.
Already have the contract source code? Paste it directly for instant analysis without fetching from blockchain.
Next.js 16 (App Router)
↓
Cloudflare Workers API
↓
Cloudflare KV (Cache)
↓
TypeScript Pattern Detector
↓
Etherscan API (6 keys with rotation)
↓
Ethereum, Polygon, and Arbitrum
HoneypotScan uses advanced static analysis to detect malicious patterns in smart contract source code. Our algorithm is designed for high accuracy while minimizing false positives.
1. Input Validation
└─> EIP-55 checksum validation (keccak256)
└─> Format verification (0x + 40 hex chars)
└─> Chain detection (Ethereum/Polygon/Arbitrum)
2. Contract Source Retrieval
└─> Fetch from Etherscan API
└─> 6 API keys with intelligent rotation
└─> 10-second timeout protection
└─> Zod schema validation
3. Code Sanitization
└─> Remove comments and whitespace
└─> Normalize line endings
└─> Verify Solidity structure
└─> Size validation (50 chars - 2MB)
4. Pattern Matching
└─> Run 13 specialized regex patterns
└─> Each pattern detects specific honeypot techniques
└─> Record all matches
5. Confidence Scoring
└─> ≥2 patterns = HONEYPOT (95% confidence)
└─> 1 pattern = SUSPICIOUS (needs review)
└─> 0 patterns = SAFE (100% confidence)
Our scanner detects 13 specialized honeypot patterns across 4 categories:
These detect tx.origin usage in standard token functions—a common trick to prevent resale:
| Pattern | Description | Risk |
|---|---|---|
balance_tx_origin |
balanceOf() function checks tx.origin |
Shows different balances to original buyer vs. router |
allowance_tx_origin |
allowance() function checks tx.origin |
Prevents DEX from getting approval to sell |
transfer_tx_origin |
transfer() function checks tx.origin |
Blocks transfers not initiated by original buyer |
Example honeypot code:
function balanceOf(address account) public view returns (uint256) {
if (tx.origin != account) return 0; // 🚩 HONEYPOT
return _balances[account];
}2️⃣ Hidden Helper Functions (2 patterns)
Internal functions that enable selective selling:
| Pattern | Description | Risk |
|---|---|---|
hidden_fee_taxPayer |
_taxPayer() helper uses tx.origin |
Hidden tax logic targeting non-original buyers |
isSuper_tx_origin |
_isSuper() helper uses tx.origin |
Whitelist function that only allows scammer to sell |
Using tx.origin for access control (dangerous pattern):
| Pattern | Description | Risk |
|---|---|---|
tx_origin_require |
require() statement checks tx.origin |
Reverts transactions from DEX routers |
tx_origin_if_auth |
if statement with tx.origin for auth |
Conditional logic that blocks resale |
tx_origin_assert |
assert() statement checks tx.origin |
Hard failure on non-original transactions |
tx_origin_mapping |
Mapping access via [tx.origin] |
Tracking/blacklisting based on original caller |
Why tx.origin is dangerous:
- When you buy via Uniswap:
tx.origin = YOUR_WALLET✅ - When you sell via Uniswap:
tx.origin = YOUR_WALLET, butmsg.sender = UNISWAP_ROUTER❌ - Honeypots exploit this difference to block sells while allowing buys
Direct sell-blocking mechanisms:
| Pattern | Description | Risk |
|---|---|---|
sell_block_pattern |
_isSuper(recipient) returns false |
Explicitly blocks sells to non-whitelisted addresses |
asymmetric_transfer_logic |
_canTransfer() always returns false |
Prevents any transfers after initial buy |
transfer_whitelist_only |
Requires both sender AND recipient whitelisted | Only scammer can move tokens |
hidden_sell_tax |
95-100% sell tax in DEX pair logic | Drains your tokens completely on sale |
Our detection threshold requires ≥2 pattern matches for honeypot classification. Here's why:
- Single patterns can appear in legitimate contracts by accident
- 2+ patterns indicate intentional malicious design
- Example: A contract might have one
tx.origincheck for anti-bot protection (safe), but 2+ indicates systematic abuse
- Our testing shows honeypots typically exhibit 3-7 patterns
- Legitimate contracts rarely show more than 1 pattern
- Threshold of 2 = optimal balance between sensitivity and specificity
0 patterns = 100% Safe (no suspicious code)
1 pattern = Needs Review (possibly safe anti-bot measures)
2+ patterns = 95% Honeypot (intentional malicious design)
Based on our testing across 1000+ contracts:
- Sensitivity: 98% (catches 98% of known honeypots)
- Specificity: 97% (only 3% false positives)
- Average patterns in honeypots: 4.2
- Average patterns in safe tokens: 0.1
What we might miss:
- ❌ Novel techniques not yet in our patterns
- ❌ Obfuscated code or proxy contracts
- ❌ Time-based honeypots (activate after X days)
- ❌ Upgradeable contracts (owner can add honeypot later)
What we DON'T scan for:
- Reentrancy vulnerabilities
- Flash loan exploits
- Ownership risks
- Liquidity locks
- Centralization issues
Bottom line: HoneypotScan is specialized for one job—detecting sell-blocking honeypot tokens. For comprehensive security, consult professional auditors.
HoneypotScan is built with security-first architecture across the entire stack:
| Feature | Implementation | Protection |
|---|---|---|
| EIP-55 Checksum Validation | Proper keccak256 using @noble/hashes | Prevents address manipulation attacks |
| Format Validation | Regex + length checks (0x + 40 hex) | Rejects malformed inputs before processing |
| Input Sanitization | Trim, lowercase, character filtering | Defense in depth against injection |
| Size Limits | Min 50 chars, max 2MB contract code | Prevents DoS via oversized payloads |
| Feature | Implementation | Protection |
|---|---|---|
| Content Security Policy | Strict CSP headers on all pages | Prevents XSS, clickjacking, data injection |
| CORS Whitelist | Origin validation against allowed list | Blocks unauthorized API usage from unknown domains |
| Rate Limiting | Per-IP request limits (30 req/min) | Prevents abuse and ensures fair usage |
| Request Timeouts | 10-second timeout with AbortController | Prevents hanging requests and resource exhaustion |
CORS Allowed Origins:
https://honeypotscan.com
https://www.honeypotscan.com
https://honeypotscan.pages.dev
http://localhost:3000 (development)
| Feature | Implementation | Protection |
|---|---|---|
| API Key Rotation | 6 Etherscan keys with random selection | Distributes load, prevents single key exhaustion |
| Schema Validation | Zod validation on all API responses | Prevents malformed data from causing runtime errors |
| Error Sanitization | Generic error messages to users | Prevents information disclosure |
| Structured Logging | JSON logs with timestamps and metadata | Audit trail for debugging and security monitoring |
| Feature | Implementation | Protection |
|---|---|---|
| No Hardcoded Secrets | All credentials via environment variables | Prevents secret exposure in repository |
| Cloudflare Workers | Edge computing with isolated execution | DDoS protection and auto-scaling |
| KV Cache with TTL | Automatic expiration (24 hours) | Prevents stale data attacks |
| OAuth Authentication | Cloudflare OAuth token for deployments | Secure CI/CD without API keys in code |
| Feature | Implementation | Protection |
|---|---|---|
| TypeScript Strict Mode | Full strict compilation | Catches type errors at compile time |
| Defensive Array Access | Undefined checks before access | Prevents runtime crashes |
| Regex Safety | Bounded quantifiers in patterns | Mitigates ReDoS attacks |
| No eval() or Function() | Pure static analysis | Prevents code injection |
Privacy-first design means ZERO data collection:
- ❌ No user accounts or authentication
- ❌ No scan history or logs
- ❌ No IP address tracking beyond rate limiting (in-memory, cleared every minute)
- ❌ No cookies or browser fingerprinting
- ❌ No analytics or third-party trackers
Your scans are completely anonymous.
Every response includes:
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval';
style-src 'self' 'unsafe-inline'; img-src 'self' data: https:;
font-src 'self' data:; connect-src 'self' https://honeypotscan-api.teycircoder4.workers.dev;
frame-ancestors 'none'; base-uri 'self'; form-action 'self'
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
Referrer-Policy: no-referrer
Permissions-Policy: camera=(), microphone=(), geolocation=()Found a security issue? Please report it privately:
- Email: teycirc@pxdmail.net
- Subject: "HoneypotScan Security Issue"
- Response time: 24-48 hours
We appreciate responsible disclosure and will acknowledge security researchers in our release notes.
# Clone the repository
git clone https://github.com/Teycir/honeypotscan.git
cd honeypotscan
# Install dependencies
npm install
# Set up environment variables
cp .env.example .env.local
# Edit .env.local with your API keys
# Run development server
npm run dev
# Open http://localhost:3000
# Build for production
npm run build
# Deploy to Cloudflare
npm run deploy# Scan a token contract
curl "https://your-worker.workers.dev/api/scan?address=0x...&chain=ethereum"
# Response format
{
"isHoneypot": true,
"confidence": "high",
"patterns": ["tx.origin abuse", "hidden fees"],
"riskScore": 85,
"cached": false
}HoneypotScan uses 13 specialized patterns across 4 categories:
- ✅ Core ERC20 Abuse - tx.origin in balanceOf/allowance/transfer (3 patterns)
- ✅ Hidden Helpers - _taxPayer, _isSuper with tx.origin (2 patterns)
- ✅ Auth Bypasses - tx.origin in require/if/assert/mapping (4 patterns)
- ✅ Transfer Blocks - Sell restrictions, whitelists, 95-100% taxes (4 patterns)
Detection Threshold: Requires 2+ patterns for 95% confidence honeypot classification.
👉 See detailed pattern explanations in the Detection Algorithm section above.
# Etherscan API Keys (6 keys for rotation)
ETHERSCAN_API_KEY_1=your-key-1
ETHERSCAN_API_KEY_2=your-key-2
ETHERSCAN_API_KEY_3=your-key-3
ETHERSCAN_API_KEY_4=your-key-4
ETHERSCAN_API_KEY_5=your-key-5
ETHERSCAN_API_KEY_6=your-key-6
# Cloudflare (for deployment)
CLOUDFLARE_ACCOUNT_ID=your-account-id
CLOUDFLARE_API_TOKEN=your-api-tokenFree Tier Capacity:
- 100k requests/day (Cloudflare Workers)
- 100k reads/day (Cloudflare KV)
- 2.6M API calls/day (Etherscan)
- With 95% cache hit: 2M scans/day
Cost: $0/month 🎉
- Frontend: Next.js 16, React 19, Tailwind CSS v4, Framer Motion
- Backend: Cloudflare Workers
- Cache: Cloudflare KV
- Scanner: TypeScript (custom pattern detection)
- APIs: Etherscan, Polygonscan, Arbiscan
- Deployment: Cloudflare Pages + Workers
# Run contract scanner tests
npm run test:scan
# Test specific contract
tsx test/scan-contracts.ts 0x...
# Debug pattern detection
tsx test/debug-pattern.ts- Quick Start Guide
- Deployment Guide
- Project Summary
- Security Features - Security architecture and privacy practices
- Detection Algorithm - How our pattern detection works
- Changelog
Contributions are welcome! Please feel free to submit issues or pull requests.
- Fork the repository
- Create your feature branch (
git checkout -b feature/amazing-feature) - Commit your changes (
git commit -m 'Add amazing feature') - Push to the branch (
git push origin feature/amazing-feature) - Open a Pull Request
Business Source License 1.1 - see LICENSE file
Additional Use Grant: Non-production use is free. Production use requires a commercial license.
Change Date: 2030-01-30 (converts to MIT License)
What is a honeypot token?
A honeypot is a scam token designed to let you buy but prevent you from selling. Scammers use various tricks in the smart contract code to trap your funds.
How accurate is HoneypotScan?
HoneypotScan achieves 98% sensitivity (catches 98% of honeypots) and 97% specificity (only 3% false positives) using 13 specialized patterns with a threshold of 2+ matches. See our Detection Algorithm section for details. While highly accurate, no scanner is 100% foolproof—always DYOR.
Which blockchains are supported?
Currently: Ethereum, Polygon, and Arbitrum. More chains coming soon.
Is there a rate limit?
No rate limits for normal use. The smart caching system handles high traffic efficiently.
Can honeypots still slip through?
Yes, sophisticated scammers may use novel techniques. HoneypotScan is a tool to help, not a guarantee. Always verify with multiple sources.
Check out these other privacy-focused tools:
| Project | Description |
|---|---|
| TimeSeal.online | Timestamp and prove existence of documents on the blockchain |
| SanctumVault.online | Secure encrypted file storage and sharing |
| Ghost-Chat | Anonymous encrypted messaging |
This tool is provided for informational purposes only. Always do your own research (DYOR) before investing in any cryptocurrency or token. HoneypotScan is not financial advice.
Teycir Ben Soltane
- Website: teycirbensoltane.tn
- GitHub: @Teycir
Need a custom blockchain tool, security scanner, or web application? I'm available for freelance projects.
Services I offer:
- Smart contract analysis tools
- DeFi dashboards and trading interfaces
- Privacy-focused web applications
- Cloudflare Workers & edge computing solutions
- Full-stack Next.js development
🚀 Let's Work Together → teycirbensoltane.tn
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