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

Terminal

npx -y base-flash-arb-mcp

Configuration

Set RPC_URL environment variable to override the default Base RPC (https://mainnet.base.org).

Claude Desktop

config.json

{
  "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