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