@execra/mcp

Execra MCP server — gives Claude (or any MCP client) a Solana wallet.

Claude can list accounts, check balances, transfer SOL, send SPL tokens, sign messages, and simulate transactions — all via natural language, no browser popups required.

Usage with Claude Desktop

Add to ~/.claude/claude_desktop_config.json:

{
  "mcpServers": {
    "execra": {
      "command": "npx",
      "args": ["-y", "@execra/mcp"],
      "env": {
        "WALLET_PASSWORD": "your-vault-password"
      }
    }
  }
}

Restart Claude Desktop. You can now say things like:

• "Check my wallet balance"
• "Send 0.1 SOL to <address>"
• "What accounts do I have?"
• "Sign this message for me"

Usage with Claude Code

Add to your project's .mcp.json or run:

claude mcp add execra -- npx -y @execra/mcp

Then set WALLET_PASSWORD in your environment.

Setup

Run the daemon once to create your encrypted vault:

npx @execra/daemon init

This generates a BIP-39 mnemonic and saves it encrypted to ~/.wallet/. You only do this once — all accounts are derived from the same vault.

Environment variables

| Variable | Description | |---|---| | WALLET_PASSWORD | Password to decrypt the vault (required) | | SOLANA_CLUSTER | Cluster to use: mainnet-beta, devnet, testnet, or a custom RPC URL (default: devnet) |

Available MCP tools

| Tool | Description | |---|---| | list_accounts | List all wallet accounts with names and balances | | get_balance | Get SOL balance for an account | | transfer_sol | Send SOL to an address | | transfer_token | Send an SPL token to an address | | sign_message | Sign an off-chain message | | simulate_transaction | Simulate a transaction and return fee + logs | | get_recent_transactions | Get recent transaction signatures |

How it works

Every tool call goes through the same pipeline:

1. Load the named account from the encrypted vault
2. Simulate the transaction (for transfers) — reject if it would fail
3. Sign with the derived keypair
4. Broadcast to Solana

The vault password never leaves your machine.

License

MIT