USDC & RPC Reference (free) MCP Server

by netlify-x402-preflight-grokbot Your server? Claim it

not responding

USDC & RPC Reference (free) is listed as active in the registry but did not answer our last check. It exposes 3 tools.

Free read-only data: verified USDC addresses and EIP-712 domains, measured RPC eth_getLogs limits.

Uptime history 10 days of history · worst day 0%

10 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

120 ms

Response time

average over 24h

open, no key

Access

streamable-http

USDC & RPC Reference (free) does not always answer

Over the last week it answered 64.4% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add usdc-rpc-reference --transport http https://x402-preflight-grokbot.netlify.app/mcp

Settings → Connectors → Add custom connector, then paste this address

https://x402-preflight-grokbot.netlify.app/mcp

~/.codex/config.toml

[mcp_servers.usdc-rpc-reference]
url = "https://x402-preflight-grokbot.netlify.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "usdc-rpc-reference": {
      "url": "https://x402-preflight-grokbot.netlify.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "usdc-rpc-reference": {
      "type": "http",
      "url": "https://x402-preflight-grokbot.netlify.app/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

paid

paid_x402_tools

Lists the pay-per-call x402 HTTP endpoints on this site (USDC on Base): Safe Read (webpage to clean text with a prompt injection scan), x402 Preflight (check an x402 endpoint before paying), and the x402 Seller Field Guide.

rpc

rpc_getlogs_limits

Measured eth_getLogs block-range limits, latency, archive support and error messages for free public RPC endpoints. Pass chain (id or slug) to filter.

usdc

usdc_token_info

Native USDC contract address, decimals, EIP-712 domain (name, version, domainSeparator) and EIP-3009 support for a chain, verified onchain. Pass chain as a chain id (8453) or slug (base). Omit chain to list all chains.

Endpoints

URL	Transport	State	Latency	Checked
https://x402-preflight-grokbot.netlify.app/mcp	streamable-http	answering	120 ms	6 min ago

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USDC & RPC Reference (free) — questions

Answers built from our own checks of this server.

What can USDC & RPC Reference (free) do?

It exposes 3 tools, read directly from the server on our last check. Among them: paid_x402_tools, rpc_getlogs_limits, usdc_token_info. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is USDC & RPC Reference (free) working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 120 ms. The bar chart above shows every period we have measured.

The registry lists USDC & RPC Reference (free) as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect USDC & RPC Reference (free)?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does USDC & RPC Reference (free) need an API key?

No. USDC & RPC Reference (free) completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.