DeFi Protocol Integration: Connecting Claude to Uniswap, Aave, and On-Chain Data

AI models are powerful reasoners. DeFi protocols are complex systems with real-time data.
Connecting them unlocks a new class of analysis tools.

The Architecture

User Query
    |
Claude (reasoning layer)
    |
MCP Server (tool layer)
    |
On-chain RPC / DeFi APIs
    |
Ethereum / L2 Networks

Reading from Uniswap V3

import { ethers } from 'ethers'

const UNISWAP_V3_POOL_ABI = [
  'function slot0() view returns (uint160 sqrtPriceX96, int24 tick, ...)',
  'function liquidity() view returns (uint128)',
  'function token0() view returns (address)',
  'function token1() view returns (address)',
]

async function getPoolData(poolAddress: string) {
  const provider = new ethers.JsonRpcProvider(process.env.ETH_RPC_URL)
  const pool = new ethers.Contract(poolAddress, UNISWAP_V3_POOL_ABI, provider)

  const [slot0, liquidity, token0, token1] = await Promise.all([
    pool.slot0(),
    pool.liquidity(),
    pool.token0(),
    pool.token1(),
  ])

  // Convert sqrtPriceX96 to human-readable price
  const sqrtPrice = Number(slot0.sqrtPriceX96)
  const price = (sqrtPrice / 2 ** 96) ** 2

  return {
    price,
    tick: Number(slot0.tick),
    liquidity: liquidity.toString(),
    token0,
    token1,
  }
}

Aave Health Factor

const AAVE_POOL_ABI = [
  'function getUserAccountData(address user) view returns (uint256, uint256, uint256, uint256, uint256, uint256)',
]

async function getAavePosition(walletAddress: string) {
  const provider = new ethers.JsonRpcProvider(process.env.ETH_RPC_URL)
  const aavePool = new ethers.Contract(
    '0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2',  // Aave V3 mainnet
    AAVE_POOL_ABI,
    provider
  )

  const [
    totalCollateral,
    totalDebt,
    availableBorrow,
    currentLiquidationThreshold,
    ltv,
    healthFactor,
  ] = await aavePool.getUserAccountData(walletAddress)

  return {
    totalCollateralUSD: Number(totalCollateral) / 1e8,
    totalDebtUSD: Number(totalDebt) / 1e8,
    healthFactor: Number(healthFactor) / 1e18,
    liquidationRisk: Number(healthFactor) / 1e18 < 1.2 ? 'high' : 'low',
  }
}

As an MCP Tool

// mcp-server/tools/defi.ts
export const defiTools = [
  {
    name: 'get_uniswap_pool',
    description: 'Get current price and liquidity for a Uniswap V3 pool',
    inputSchema: {
      type: 'object',
      properties: {
        pool_address: { type: 'string', description: 'Uniswap V3 pool contract address' },
      },
      required: ['pool_address'],
    },
    handler: async ({ pool_address }: { pool_address: string }) => {
      const data = await getPoolData(pool_address)
      return JSON.stringify(data)
    },
  },
  {
    name: 'check_aave_health',
    description: 'Check the Aave health factor and liquidation risk for a wallet',
    inputSchema: {
      type: 'object',
      properties: {
        wallet_address: { type: 'string' },
      },
      required: ['wallet_address'],
    },
    handler: async ({ wallet_address }: { wallet_address: string }) => {
      const data = await getAavePosition(wallet_address)
      return JSON.stringify(data)
    },
  },
]

What Claude Can Do With This

With these tools connected, you can ask:

• "Compare TVL across the top 5 ETH/USDC pools on Uniswap"
• "What is my liquidation risk on Aave given current ETH price?"
• "Find the highest-yielding stablecoin pools with >$10M liquidity"
• "Alert me if the WBTC/ETH pool price deviates more than 2% from Binance"

The LLM handles the reasoning. The MCP tools provide the live data.

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