BaseLens

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.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "0x-prefixed Base address"
    }
  },
  "required": [
    "address"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "token": {
      "type": "string",
      "description": "ERC-20 token contract on Base"
    },
    "address": {
      "type": "string",
      "description": "0x-prefixed Base address"
    }
  },
  "required": [
    "token",
    "address"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "token": {
      "type": "string",
      "description": "Token contract on Base"
    }
  },
  "required": [
    "token"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "hash": {
      "type": "string",
      "description": "0x-prefixed transaction hash on Base"
    }
  },
  "required": [
    "hash"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "ENS or Basename, e.g. jesse.base.eth or vitalik.eth"
    },
    "address": {
      "type": "string",
      "description": "Alternative: 0x address to reverse-resolve"
    }
  },
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "token": {
      "type": "string",
      "description": "ERC-20 token contract on Base"
    }
  },
  "required": [
    "token"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "0x-prefixed Base address"
    },
    "tokens": {
      "type": "string",
      "description": "Optional comma-separated token contracts (max 5). Default USDC."
    },
    "blocks": {
      "type": "string",
      "description": "Lookback in blocks, 100–30000 (default 10000)"
    },
    "limit": {
      "type": "string",
      "description": "Max transfers to return, ≤200 (default 50)"
    }
  },
  "required": [
    "address"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "description": "0x-prefixed Base address"
    }
  },
  "required": [
    "address"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}