Base Onchain Tools is an MCP server with 12 tools an agent can call, among them base_address_check, base_allowance, base_contract_audit. It answers at https://base-onchain-tools.dolerite.workers.dev/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, succeeded.
Base mainnet analysis: contract audits, transfer simulation, token pricing. Paid via x402.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
base_address_check | 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 Bas Inputs: address |
base_allowance | 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 Ba Inputs: owner, spender, token |
base_contract_audit | 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-destr Inputs: address, follow_proxy |
base_contract_type | 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 o Inputs: address |
base_demo | 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 | 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 r |
base_portfolio | 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 Inputs: addresses |
base_price | 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 th |
base_simulate_transfer | 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 Inputs: from, to, amount, token, spender |
base_token | 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 nev Inputs: address |
base_token_price | 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, Inputs: address |
base_tx_check | 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 ret Inputs: hash |
Every block below points at https://base-onchain-tools.dolerite.workers.dev/mcp. Pick your client and copy.
claude mcp add --transport http base-onchain-tools https://base-onchain-tools.dolerite.workers.dev/mcp
{
"mcpServers": {
"base-onchain-tools": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://base-onchain-tools.dolerite.workers.dev/mcp"]
}
}
}{
"mcpServers": {
"base-onchain-tools": {
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"servers": {
"base-onchain-tools": {
"type": "http",
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"context_servers": {
"base-onchain-tools": {
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"mcpServers": {
"base-onchain-tools": {
"serverUrl": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"mcpServers": {
"base-onchain-tools": {
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}name: Base Onchain Tools
version: 0.0.1
schema: v1
mcpServers:
- name: Base Onchain Tools
type: streamable-http
url: https://base-onchain-tools.dolerite.workers.dev/mcp{
"mcpServers": {
"base-onchain-tools": {
"httpUrl": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"mcpServers": {
"base-onchain-tools": {
"type": "http",
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}{
"mcpServers": {
"base-onchain-tools": {
"url": "https://base-onchain-tools.dolerite.workers.dev/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fbase-onchain-tools.dolerite.workers.dev%2Fmcp&type=streamable_http&id=base-onchain-tools&name=Base%20Onchain%20Tools
It answered our last check on 19 October 2026 in 1858 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
12, as returned by the server's own tools/list on 11 September 2026: base_address_check, base_allowance, base_contract_audit, base_contract_type, base_demo, base_gas, base_portfolio, base_price, and 4 more.
It answered our last check on 19 October 2026 in 1858 ms. Over 6 checks since 10 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://base-onchain-tools.dolerite.workers.dev/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: dev.workers.dolerite.base-onchain-tools. Endpoint host: base-onchain-tools.dolerite.workers.dev. ARD identifier: urn:air:dev.workers.dolerite.base-onchain-tools:mcp:base-onchain-tools.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.