Sim API MCP Server

MCP (Model Context Protocol) server for Sim blockchain APIs, providing access to EVM and SVM transaction data, balances, and token information.

📦 This project uses pnpm as the package manager

Installation

# Clone and install
git clone https://github.com/duneanalytics/sim-api-mcp.git
cd sim-api-mcp
pnpm install

Setup

1. Get your Sim API key from Sim API Console

2. Set environment variable:

export SIM_API_KEY=your_api_key_here

3. Start the server:

pnpm run start

Usage with Claude Desktop

First, start the server locally:

pnpm run start

Then add to your Claude Desktop MCP configuration:

{
  "mcpServers": {
    "sim-api": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "http://localhost:3000/mcp"
      ],
      "timeout": 30000,
      "reconnectDelay": 5000,
      "env": {
        "SIM_API_KEY": "YOUR_KEY"
      }
    }
  }
}

Available Tools

EVM Tools

• getBalances - Get token balances for EVM wallet addresses
• getEVMTransactions - Get transaction history for EVM addresses
• getTokenPrice - Get current USD prices for EVM tokens
• listSupportedChainsTransactions - List supported chains for transactions
• listSupportedChainsTokenBalances - List supported chains for balances

SVM Tools

• getSVMBalances - Get token balances for Solana wallet addresses
• getSVMTransactions - Get transaction history for Solana addresses

Development

Note: This project uses pnpm for package management

# Clone and install
git clone <repo-url>
cd sim-api-mcp
pnpm install

# Start development server
pnpm run dev

# Run tests
pnpm test

API Reference

Server runs on port 3000 by default. MCP endpoint: http://localhost:3000/mcp with Streamable HTTP