Webbersites X402 MCP Server

by webberdesignio.github.webberdesign/webbersites-x402-mcpv0.3.0

45 pay-per-call AI agent tools + wallet-owned agent memory. Scraping, SEO, lint, crypto. x402 USDC

0Node.jsstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Slowing3mo ago

Install Webbersites X402 MCP server

claude mcp add webbersites-x402 -e EVM_PRIVATE_KEY='<evm-private-key>' -- npx -y webbersites-x402-mcp

{
  "mcpServers": {
    "webbersites-x402": {
      "command": "npx",
      "args": [
        "-y",
        "webbersites-x402-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<evm-private-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "webbersites-x402": {
      "command": "npx",
      "args": [
        "-y",
        "webbersites-x402-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<evm-private-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "webbersites-x402": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "webbersites-x402-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<evm-private-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "webbersites-x402": {
      "command": "npx",
      "args": [
        "-y",
        "webbersites-x402-mcp"
      ],
      "env": {
        "EVM_PRIVATE_KEY": "<evm-private-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
EVM_PRIVATE_KEY	—	yes	0x… private key of a dedicated hot wallet holding USDC on Base mainnet; each tool call pays for itself. Omit to run in quote mode (tools return prices and payment requirements instead of data).
X402_MAX_PRICE	—	—	Maximum USD price per call; more expensive tools are refused before any payment. Default 0.50 (10x headroom — prices currently range $0.001-$0.05); lower it to cap spend harder.

Freshness

Slowing — last maintenance signal 3mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-07-09 · 3mo ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-07-09 · 3mo ago · official registry · v0.3.0

FAQ

›How do I install the Webbersites X402 MCP server in Claude Code?

Run: claude mcp add webbersites-x402 -e EVM_PRIVATE_KEY='<evm-private-key>' -- npx -y webbersites-x402-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Webbersites X402 require an API key?

Yes. It expects EVM_PRIVATE_KEY, of which 1 is a secret.

›Can I use Webbersites X402 as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Webbersites X402 in the official MCP registry?

Yes, as io.github.webberdesign/webbersites-x402-mcp.