BaseLens

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "baselens": {
      "type": "http",
      "url": "https://baselens-api.vercel.app/mcp"
    }
  }
}

11 tools

• base_address

  Base (chain 8453) address snapshot: EOA vs contract vs EIP-7702, ETH balance, nonce, code size and native USDC balance, at the latest block. Costs $0.002 USDC on Base via x402.

• base_erc20_balance

  ERC-20 balance of any address for any token on Base, with symbol and decimals already applied (raw and human-readable). Costs $0.002 USDC on Base via x402.

• base_token

  Token facts on Base: name, symbol, decimals, total supply, contract code size, owner() and EIP-1967 proxy implementation, plus plain-language notes (upgradeable? owner renounced?). Read-only facts, not advice. Costs $0.003 USDC on Base via x402.

• base_tx

  Human-readable summary of a Base transaction: status, block time, from/to, value, total fee (incl. L1 fee), and decoded ERC-20 Transfer events with token symbols and amounts. Handy to verify a payment landed. Costs $0.003 USDC on Base via x402.

• base_gas

  Current Base gas: base fee, gas price, suggested EIP-1559 max fee and priority fee (gwei), block fullness, and cost of a plain ETH transfer. Costs $0.001 USDC on Base via x402.

• base_name

  Resolve a Basename (name.base.eth) or ENS name to its Base/Ethereum address, or reverse-resolve an address to its primary ENS/Basename. Includes avatar record. Costs $0.001 USDC on Base via x402.

• base_price

  On-chain USDC price of any Base ERC-20: executable Uniswap v3 quote for 1 whole token (direct USDC pool or via WETH, best fee tier). No third-party price API. Costs $0.003 USDC on Base via x402.

• base_transfers

  Recent ERC-20 transfers in and out of an address on Base for up to 5 tokens (default USDC), newest first, over the last ~10k blocks (max 30k). Check incoming payments or wallet activity. Costs $0.004 USDC on Base via x402.

• base_contract

  Contract check on Base: is it a contract, code size, owner(), proxy implementation, and whether the source (and implementation) is verified on Sourcify, plus plain-language notes. Not an audit. Costs $0.003 USDC on Base via x402.

• base_free_gas_sample

  Free sample: latest Base block number and base fee (gwei). Use it to test the connection.

• base_catalog

  Lists every BaseLens tool with price, inputs and the equivalent x402 HTTP URL.

Security scan

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