Summary
Wraps Base mainnet RPC calls into seven read-only tools for wallet inspection and transaction planning. You get balance checks across ETH and ERC-20s, gas estimates, token metadata lookups, allowance verification, ENS resolution, and transaction status queries. No API keys needed since it hits public Base RPC endpoints. Useful when you're building agents that need to check portfolio state, verify approvals before swaps, monitor gas costs, or confirm transaction outcomes on Base. Runs via npx with zero config, though you can point it at custom RPC providers through environment variables if you want rate limit headroom or specific node features.
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base-wallet-toolkit-mcp
An MCP server for AI agents to interact with Base chain wallets. Check balances, estimate gas, inspect tokens, verify allowances, and more.
Install
npx -y base-wallet-toolkit-mcp
Tools
| Tool | Description |
|---|---|
check_balances | Get ETH + ERC-20 token balances for any wallet |
get_gas_estimate | Estimate gas cost for a transaction on Base |
get_token_info | Get ERC-20 token details (name, symbol, supply, decimals) |
check_allowance | Check token approval/allowance status |
get_base_gas_price | Get current Base gas price and typical tx costs |
resolve_address | Resolve ENS name to address (or reverse lookup) |
get_tx_status | Check transaction status and details by hash |
Setup
Add to your MCP client config (Claude Code, Cursor, etc.):
{
"mcpServers": {
"base-wallet-toolkit": {
"command": "npx",
"args": ["-y", "base-wallet-toolkit-mcp"]
}
}
}
No API keys required. All tools are read-only and use public Base RPC.
Use Cases
- Portfolio tracking: Check ETH and token balances across wallets
- Pre-trade checks: Verify allowances before swaps, estimate gas costs
- Token research: Look up any ERC-20 token details on Base
- Transaction monitoring: Check if a tx confirmed, reverted, or is pending
- ENS resolution: Convert between ENS names and addresses
- Gas optimization: Monitor Base gas prices to time transactions
Chain
- Network: Base mainnet (chainId 8453)
- RPC: Uses public Base RPC by default, configurable via
RPC_URLenv var - ENS: Resolves via Ethereum mainnet (configurable via
ETH_RPC_URL)
License
MIT
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →Configuration
RPC_URLBase mainnet RPC URL (defaults to https://mainnet.base.org)