Base Flash Arb

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