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MCP server · RAG

Crypto

· github.com/igoforth/crypto-mcp

Crypto MCP — cryptocurrency prices and currency conversion

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37Low

Scored 2 days ago · breakdown

About Crypto

Crypto is an MCP server in the RAG category: crypto MCP — cryptocurrency prices and currency conversion.

The repository has 9 stars and 0 forks, with the last commit 2 days ago. Recent commit activity is the strongest signal that reported issues will get attention.

Install

Claude Code
claude mcp add crypto -- npx -y @sebastienrousseau/crypto-mcp
npx
npx -y @sebastienrousseau/crypto-mcp

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

Tools (3)

get_balanceGet wallet balance — native only, specific ERC-20, or `"all"` for native + common tokens

Parameters not published.

get_erc20_transfersGet ERC-20 transfer history (incoming/outgoing)

Parameters not published.

get_transaction_countGet transaction count (nonce) for an address

Parameters not published.

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Security checks

  • ✓README presentThe repository ships documentation.

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README

@igoforth/crypto-mcp

Minimal, auditable MCP server for inspecting Ethereum/Polygon wallet balances and transactions.

Security

  • Minimal dependencies: Only viem, @modelcontextprotocol/sdk, and zod
  • Read-only: No transaction signing or wallet operations
  • Auditable: Single file, <300 lines of code
  • Type-safe: Full TypeScript with Zod validation

Tools

Tool Description
get_balance Get wallet balance — native only, specific ERC-20, or "all" for native + common tokens
get_transaction_count Get transaction count (nonce) for an address
get_erc20_transfers Get ERC-20 transfer history (incoming/outgoing)

Supported Chains

  • Ethereum Mainnet
  • Polygon (default)
  • Polygon Amoy Testnet

Common Tokens (Polygon)

Token Address
USDC.e 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
USDC 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359
USDT 0xc2132D05D31c914a87C6611C10748AEb04B58e8F
DAI 0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063
WETH 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619
WMATIC 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270

Installation

npm install -g @igoforth/crypto-mcp

Or with pnpm:

pnpm add -g @igoforth/crypto-mcp

Usage

Claude Code

Add to ~/.claude/settings.json:

{
  "mcpServers": {
    "crypto-wallet": {
      "command": "crypto-mcp"
    }
  }
}

Claude Desktop

Add to your Claude Desktop config:

{
  "mcpServers": {
    "crypto-wallet": {
      "command": "npx",
      "args": ["-y", "@igoforth/crypto-mcp"]
    }
  }
}

Example Queries

Once configured, you can ask:

  • "Check my USDC balance on Polygon for address 0x..."
  • "Get all token balances for 0x..."
  • "What's the MATIC balance for my wallet?"
  • "Show recent USDC transfers for 0x..."

RPC Configuration

Uses PublicNode free RPC endpoints by default — no API keys required.

All tools accept an optional rpcUrl parameter to use a custom RPC endpoint (e.g. Alchemy, Infura).

License

MIT

README copy captured when this server was indexed; it may lag the repository. The original is authoritative.

Questions

About Crypto

How do I install Crypto?

Run claude mcp add crypto -- npx -y @sebastienrousseau/crypto-mcp, then add the server to your MCP client's configuration.

Is Crypto safe to use with an AI agent?

Its trust score is 37 out of 100 (low). It passes 1 of the 1 static security checks run so far. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Crypto still maintained?

Yes — the last commit was 2 days ago. The repository has 9 stars and 0 forks.