README.md
Detect flash loan arbitrage opportunities across DEXes on Base mainnet.
base-flash-arb-mcp
MCP server for detecting flash loan arbitrage opportunities across DEXes on Base mainnet.
Tools
| Tool | Description |
|---|---|
detect_arb_opportunity |
Compare token prices across Uniswap V2, V3, and Aerodrome. Find profitable arb routes. |
get_pool_reserves |
Get reserves/liquidity for a token across all known DEX pools on Base. |
estimate_flash_profit |
Estimate flash loan profit between two pools after gas costs. |
scan_top_tokens |
Scan top traded tokens on Base for arb opportunities via DexScreener. |
get_price_across_dexes |
Get current price of a token on all available DEXes. |
check_sandwich_risk |
Analyze recent trades for sandwich attack patterns (bot activity). |
get_mempool_pending |
Check pending transactions for front-run detection. |
Install
npx -y base-flash-arb-mcp
Configuration
Set RPC_URL environment variable to override the default Base RPC (https://mainnet.base.org).
Claude Desktop
{
"mcpServers": {
"base-flash-arb": {
"command": "npx",
"args": ["-y", "base-flash-arb-mcp"],
"env": {
"RPC_URL": "https://mainnet.base.org"
}
}
}
}
DEXes Covered
- Uniswap V2 (Factory:
0x8909Dc15e40173Ff4699343b6eB8132c65e18eC6) - Uniswap V3 (Fee tiers: 0.05%, 0.3%, 1%)
- Aerodrome (Volatile + Stable pools)
How It Works
All tools are read-only -- no private key needed. The server queries on-chain pool reserves, uses DEX quoters for accurate pricing, and compares across exchanges to find price discrepancies that could be exploited via flash loans.
Flash profit estimation accounts for:
- Aave flash loan fee (0.09%)
- Base gas costs (dynamically estimated)
- Slippage warning
Sandwich detection uses heuristic analysis of Swap events to identify same-block multi-transaction patterns from single addresses.
Related MCP Servers
| Package | Tools | What it does |
|---|---|---|
obsd-launchpad-mcp |
14 | Deploy tokens, trade, earn OBSD |
base-security-scanner-mcp |
8 | Scan contracts for vulnerabilities |
base-price-oracle-mcp |
7 | On-chain price feeds from DEX pools |
base-multi-wallet-mcp |
8 | Coordinated multi-wallet trading |
base-gasless-deploy-mcp |
5 | Gasless ERC-20 token deployment |
base-flash-arb-mcp |
7 | Detect arbitrage opportunities |
base-token-sniper-mcp |
5 | Discover & trade new launches |
base-wallet-toolkit-mcp |
7 | Wallet balances, gas, tokens |
base-contract-reader-mcp |
6 | Read any smart contract (free) |
create-mcp-server-cli |
- | Scaffold a new MCP server |
License
MIT
Tools (7)
detect_arb_opportunityCompare token prices across Uniswap V2, V3, and Aerodrome to find profitable arb routes.get_pool_reservesGet reserves/liquidity for a token across all known DEX pools on Base.estimate_flash_profitEstimate flash loan profit between two pools after gas costs.scan_top_tokensScan top traded tokens on Base for arb opportunities via DexScreener.get_price_across_dexesGet current price of a token on all available DEXes.check_sandwich_riskAnalyze recent trades for sandwich attack patterns.get_mempool_pendingCheck pending transactions for front-run detection.Environment Variables
RPC_URLBase RPC URL to override the default mainnet endpoint.Configuration
claude_desktop_config.json
{"mcpServers": {"base-flash-arb": {"command": "npx", "args": ["-y", "base-flash-arb-mcp"], "env": {"RPC_URL": "https://mainnet.base.org"}}}}Try it
→Scan the top traded tokens on Base and identify any current arbitrage opportunities.
→What is the current price of USDC across all supported DEXes on Base?
→Estimate the potential flash loan profit for a trade between Uniswap V3 and Aerodrome for the WETH/USDC pair.
→Check for recent sandwich attack patterns on the latest transactions for a specific token.
→Get the current pool reserves for the AERO token on Base.