defi-mcp 0.1.0

An MCP server giving AI agents access to DeFi data on EVM chains.

defi-mcp

An MCP (Model Context Protocol) server that gives AI agents direct, on-chain access to DeFi data on EVM chains — wallet balances, Aave v3 lending positions, and live token prices, with no centralized API in the middle.

Status: Live and functional. 4 tools available today, more on the roadmap.

Why

Most "DeFi + AI" integrations route through a centralized API that can rate-limit, paywall, or simply disappear. defi-mcp talks directly to the chain (via your own RPC provider) and to first-party oracles (Chainlink), so the data your AI agent gets is exactly what's on-chain — verifiable, and not dependent on a third-party API staying online.

Tools

get_token_balance

Reads the ERC-20 balance of any wallet address for a supported token.

Supported tokens on Polygon: USDC, USDC.e, USDT, WETH, WMATIC, WBTC, DAI, AAVE.

// get_token_balance(address="0x...", token_symbol="USDC", chain="polygon")
{
  "address": "0x...",
  "token": "USDC",
  "chain": "polygon",
  "balance": 268.21,
  "raw_balance": "268210000",
  "decimals": 6
}

get_aave_position

Reads a user's full Aave v3 lending/borrowing position: collateral, debt, available borrowing power, and health factor — straight from the Aave v3 Pool contract.

// get_aave_position(address="0x...", chain="polygon")
{
  "address": "0x...",
  "chain": "polygon",
  "total_collateral_usd": 969.78,
  "total_debt_usd": 288.16,
  "available_borrows_usd": 484.86,
  "liquidation_threshold_pct": 82.79,
  "ltv_pct": 79.71,
  "health_factor": 2.79,
  "has_active_position": true
}

A health_factor below 1.0 means the position is at risk of liquidation. A null health factor means the user has no outstanding debt.

get_token_price

Reads the current USD price of a token directly from a Chainlink price feed — the same oracle DeFi protocols use internally, so the price is consistent with what get_aave_position reports.

Supported on Polygon: ETH/WETH, MATIC/WMATIC, WBTC, USDC, USDT.

// get_token_price(token_symbol="WBTC", chain="polygon")
{
  "token": "WBTC",
  "chain": "polygon",
  "price_usd": 63835.77,
  "decimals": 8,
  "updated_at": 1782032816
}

hello

Simple connectivity check — confirms the MCP server is reachable and responding.

Supported chains

• Polygon

More EVM chains are on the roadmap (see below).

Installation

Requires Python 3.10+ and an RPC provider API key (e.g. Alchemy, free tier works).

git clone https://github.com/matiosera3-ops/defi-mcp.git
cd defi-mcp
python -m venv venv

# Windows
.\venv\Scripts\Activate.ps1
# macOS/Linux
source venv/bin/activate

pip install -e .

Create a .env file in the project root:

POLYGON_RPC_URL=https://polygon-mainnet.g.alchemy.com/v2/YOUR_API_KEY

Usage with Claude Desktop

Add this to your Claude Desktop MCP config (claude_desktop_config.json):

{
  "mcpServers": {
    "defi-mcp": {
      "command": "python",
      "args": ["/absolute/path/to/defi-mcp/server.py"]
    }
  }
}

Restart Claude Desktop, and the tools above will be available to the model.

Testing locally

You can test the server directly with the official MCP Inspector:

npx @modelcontextprotocol/inspector python server.py

Roadmap

• Track Uniswap v3 LP positions and impermanent loss
• Simulate swaps with realistic slippage estimates
• Monitor protocol TVLs
• Additional chains (Ethereum, Arbitrum, Base)
• defi-mcp-cloud — hosted tier with MEV-specific tools, caching, and higher rate limits

Architecture

Open-core model: this repository (MIT licensed) covers standard on-chain read tools. A separate defi-mcp-cloud will offer a hosted version with MEV-related tools, request caching, and managed RPC access for users who don't want to run their own infrastructure.

Contributing

Issues and PRs welcome. This is an early-stage project — feedback on what tools would actually be useful to you is especially valuable.

License

MIT