HPP x402 MCP Bridge MCP Server

io.github.hpp-io/x402-mcp-bridge

Repository Registry

What is the HPP x402 MCP Bridge MCP server?

MCP bridge for autonomous x402 payments in HPP USDC.e — discover and pay for services per call.

How to install HPP x402 MCP Bridge

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

DELEGATE_PRIVATE_KEY
secret
Delegate EOA private key used to sign payments. Auto-created in the OS keychain if unset.
HPP_NETWORK
Target network: eip155:181228 (HPP Sepolia, default) or eip155:190415 (HPP Mainnet).
RESOURCE_SERVER_URL
Optional upstream MCP server to proxy. Omit to expose only the local tools.
SAFE_ADDRESS
Safe address for governance (Safe) mode. Set together with ALLOWANCE_MODULE_ADDRESS.
ALLOWANCE_MODULE_ADDRESS
Safe AllowanceModule address for governance (Safe) mode. Set together with SAFE_ADDRESS.

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

{
  "mcpServers": {
    "x402-mcp-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@hpp-io/x402-mcp-bridge"
      ],
      "env": {
        "DELEGATE_PRIVATE_KEY": "<YOUR_DELEGATE_PRIVATE_KEY>",
        "HPP_NETWORK": "<YOUR_HPP_NETWORK>",
        "RESOURCE_SERVER_URL": "<YOUR_RESOURCE_SERVER_URL>",
        "SAFE_ADDRESS": "<YOUR_SAFE_ADDRESS>",
        "ALLOWANCE_MODULE_ADDRESS": "<YOUR_ALLOWANCE_MODULE_ADDRESS>"
      }
    }
  }
}