MCP server

Base Onchain Tools

dev.workers.dolerite.base-onchain-tools/base-onchain-tools

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Base mainnet analysis: contract audits, transfer simulation, token pricing. Paid via x402.

Website

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

12

Token cost

About 2,100 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http base-onchain-tools https://base-onchain-tools.dolerite.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.base-onchain-tools]
url = "https://base-onchain-tools.dolerite.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"base-onchain-tools":{"httpUrl":"https://base-onchain-tools.dolerite.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"base-onchain-tools":{"url":"https://base-onchain-tools.dolerite.workers.dev/mcp"}}}

VS Code

{"servers":{"base-onchain-tools":{"type":"http","url":"https://base-onchain-tools.dolerite.workers.dev/mcp"}}}

Antigravity

agy mcp add base-onchain-tools https://base-onchain-tools.dolerite.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"base-onchain-tools","server_url":"https://base-onchain-tools.dolerite.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"base-onchain-tools","server_url":"https://base-onchain-tools.dolerite.workers.dev/mcp"}

Tools

• base_address_check ~152 tokens
  Pre-flight check on a Base mainnet address before you pay it: contract vs EOA, ETH and USDC balances, outbound tx count, and warnings about whether funds sent there can actually be moved. Costs $0.002 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; faile
• base_allowance ~192 tokens
  ERC-20 allowance on Base: how much a spender may pull from an owner, whether it is an unlimited approval, the owner balance, and how much is actually spendable right now. Defaults to USDC. Costs $0.001 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; fail
• base_contract_audit ~364 tokens
  What an UNVERIFIED Base contract can actually do — the case where block explorers show you nothing. Disassembles the deployed bytecode with a PUSH-aware opcode walk (a naive byte scan reports SELFDESTRUCT on contracts that cannot self-destruct), strips the Solidity metadata trailer, recovers the fun
• base_contract_type ~153 tokens
  Identify what a Base contract actually is: ERC-20, ERC-721 or ERC-1155 via ERC-165, plus proxy detection across EIP-1967, EIP-1822 and the legacy ZeppelinOS slot with the current implementation address. Costs $0.002 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requ
• base_demo ~88 tokens
  Free. Returns a complete, live contract audit of Base USDC — the same output shape as the paid audit tool, with the address fixed. Call this first to see what the paid tools return before spending anything.
• base_gas ~115 tokens
  Live Base mainnet gas oracle: current gas price, base fee, recent base fee trend, priority fee percentiles, and the estimated cost of a plain ERC-20 transfer in ETH. Costs $0.001 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; failed calls are never bill
• base_portfolio ~141 tokens
  ETH and USDC balances for up to 20 Base addresses in a single call, with per-address funded flags and totals. One request instead of forty RPC round trips. Costs $0.003 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; failed calls are never billed.
• base_price ~118 tokens
  ETH/USD and BTC/USD read live from Chainlink's on-chain price feeds on Base, with the feed's own description, decimals, update timestamp, age in seconds and a staleness flag. Costs $0.001 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; failed calls are n
• base_simulate_transfer Moves money · ~308 tokens
  Will this token payment actually go through, and if not exactly why. Simulates the transfer without spending gas, decodes the real revert reason (Error(string), Panic codes translated to English, or a custom error selector), and separately reports balance and allowance blockers. Understands that a c
• base_token ~127 tokens
  ERC-20 token metadata on Base mainnet: name, symbol, decimals and total supply, read straight from the contract. Costs $0.001 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; failed calls are never billed.
• base_token_price ~197 tokens
  USD price for ANY token on Base, not just the two assets Chainlink covers. Discovers every Uniswap V3 pool against WETH and USDC across all four fee tiers, reads sqrtPriceX96 and does the Q96 fixed-point maths, prices off the deepest pool, ignores deployed-but-never-traded pools, and cross-checks th
• base_tx_check ~145 tokens
  Confirm a Base mainnet transaction: success or reverted, block, confirmations and finality, gas used, and every ERC-20 transfer it moved with USDC amounts decoded. Costs $0.002 per call, paid in USDC over x402 on Base. Calling this tool returns the payment requirements; failed calls are never billed

Browse

• Payments
• Databases
• Travel and flights
• Crypto and blockchains

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