X402 MCP Server

by carboncashmere Your server? Claim it

local only

X402 MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 39 installs a week from npm. Last commit 20 May 2026.

177 crypto market intel endpoints with auto x402 USDC micropayments from your AI agent

Installs per day peak 20 · avg 8 · +35% w/w

a month agotoday

Installs / week

npm · @carbon-cashmere/x402-mcp

Stars

1 open issues

20 May 2026

Last commit

0 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check X402 MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add x402-mcp -- npx -y @carbon-cashmere/x402-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "x402-mcp": {
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.x402-mcp]
command = "npx"
args = ["-y", "@carbon-cashmere/x402-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "x402-mcp": {
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "x402-mcp": {
      "args": [
        "-y",
        "@carbon-cashmere/x402-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: EVM_PRIVATE_KEY (0x-hex private key for Base/Polygon/Arbitrum USDC payments (dedicated wallet)), SVM_PRIVATE_KEY (base58 Solana keypair for Solana USDC payments (optional)), X402_TOOL_LIMIT (Max tools exposed (1-177, default 100)). The author declared them in the registry entry; get the values from the project itself.

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X402 MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for X402 MCP?

X402 MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @carbon-cashmere/x402-mcp was installed 39 times last week.

How do I connect X402 MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @carbon-cashmere/x402-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use X402 MCP?

The npm package @carbon-cashmere/x402-mcp was installed 39 times in the last week. Week over week that is +35%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is X402 MCP open source?

Yes — it is published under the MIT licence, written in TypeScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.