X402 MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. 68 installs a week from npm. Last commit 23 Sep 2026.
Pay-per-call x402 tools on Base: web extract/render, burn-once secret vault, chart, GeoTIFF
What the code does
We read the source, 2 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
t.innerHTML = html; t.hidden = false;
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add x402-mcp-server -e 'BASE_PRIVATE_KEY=<BASE_PRIVATE_KEY>' -- npx -y x402-mcp-server_by_milza{
"mcpServers": {
"x402-mcp-server": {
"command": "npx",
"args": [
"-y",
"x402-mcp-server_by_milza"
],
"env": {
"BASE_PRIVATE_KEY": "<BASE_PRIVATE_KEY>"
}
}
}
}[mcp_servers.x402-mcp-server]
command = "npx"
args = ["-y", "x402-mcp-server_by_milza"]
env = { BASE_PRIVATE_KEY = "<BASE_PRIVATE_KEY>" }{
"mcpServers": {
"x402-mcp-server": {
"command": "npx",
"args": [
"-y",
"x402-mcp-server_by_milza"
],
"env": {
"BASE_PRIVATE_KEY": "<BASE_PRIVATE_KEY>"
}
}
}
}{
"servers": {
"x402-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"x402-mcp-server_by_milza"
],
"env": {
"BASE_PRIVATE_KEY": "<BASE_PRIVATE_KEY>"
}
}
}
}Put your own value in place of
<BASE_PRIVATE_KEY> (0x-prefixed EVM private key, wallet funded with Base USDC -- signs EIP-3009 payments locally).
The author’s registry entry marks it as required.
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X402 MCP Server — questions
Answers built from our own checks of this server.