MCP server

MCPFax On-Chain Toolkit

com.mcpscores/onchain-toolkit

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

The on-chain facts you need in the seconds before you transact.

Website

At a glance

Type

MCP server

Publisher

mcpscores.com (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 1,210 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 onchain-toolkit https://onchain-toolkit.bowling-anthony.workers.dev/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.onchain-toolkit]
url = "https://onchain-toolkit.bowling-anthony.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"onchain-toolkit":{"httpUrl":"https://onchain-toolkit.bowling-anthony.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"onchain-toolkit":{"url":"https://onchain-toolkit.bowling-anthony.workers.dev/mcp"}}}

VS Code

{"servers":{"onchain-toolkit":{"type":"http","url":"https://onchain-toolkit.bowling-anthony.workers.dev/mcp"}}}

Antigravity

agy mcp add onchain-toolkit https://onchain-toolkit.bowling-anthony.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":"onchain-toolkit","server_url":"https://onchain-toolkit.bowling-anthony.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"onchain-toolkit","server_url":"https://onchain-toolkit.bowling-anthony.workers.dev/mcp"}

Tools

• address_info ~260 tokens
  Native balance, the next nonce to use, and whether the address holds contract code — the three things needed before sending from or to an address. Pass 'token' as well to read an ERC-20 balance for the same address in the same call. Values are read at the latest block, so a reorg can change them. Co
• gas_now ~207 tokens
  Live gas price on Ethereum, Base, Arbitrum, Optimism or Polygon — in wei and gwei, plus what a plain 21,000-gas transfer would cost in the native token, which is the number you actually budget with. Pass several chains comma-separated to compare where to execute. Call this immediately before sending
• request_data ~168 tokens
  FREE, no payment. Describe in your own words the data you are trying to buy — anything, not just on-chain data — and get back whether we operate a service that supplies it, with the MCP endpoint if so. Every request is catalogued so repeatedly-requested data gets built. Nothing identifying is stored
• token_info ~241 tokens
  Read an ERC-20's name, symbol, decimals and total supply straight from the contract on the chain you name, and confirm the address actually has code there. Use before quoting an amount or building a transfer: getting decimals wrong is the classic way to send 1,000,000x the intended value. An address
• tx_status ~229 tokens
  Status of a transaction by hash: success, failed or still pending, with the block it landed in, sender and recipient, value moved, gas used, the fee actually paid, and how many logs it emitted. Use to confirm an action you took really settled rather than assuming it did. An unknown hash is reported

Browse

• MCPFax tools
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• Crypto and blockchains

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