MCP bridge for autonomous x402 payments in HPP USDC.e — discover and pay for services per call.
Connect Runs on your machine
claude mcp add x402-mcp-bridge -e DELEGATE_PRIVATE_KEY=<DELEGATE_PRIVATE_KEY> -e HPP_NETWORK=<HPP_NETWORK> -e RESOURCE_SERVER_URL=<RESOURCE_SERVER_URL> -e SAFE_ADDRESS=<SAFE_ADDRESS> -e ALLOWANCE_MODULE_ADDRESS=<ALLOWANCE_MODULE_ADDRESS> -- npx -y @hpp-io/[email protected]{
"mcpServers": {
"x402-mcp-bridge": {
"command": "npx",
"args": [
"-y",
"@hpp-io/[email protected]"
],
"env": {
"DELEGATE_PRIVATE_KEY": "<DELEGATE_PRIVATE_KEY>",
"HPP_NETWORK": "<HPP_NETWORK>",
"RESOURCE_SERVER_URL": "<RESOURCE_SERVER_URL>",
"SAFE_ADDRESS": "<SAFE_ADDRESS>",
"ALLOWANCE_MODULE_ADDRESS": "<ALLOWANCE_MODULE_ADDRESS>"
}
}
}
}{
"mcpServers": {
"x402-mcp-bridge": {
"command": "npx",
"args": [
"-y",
"@hpp-io/[email protected]"
],
"env": {
"DELEGATE_PRIVATE_KEY": "<DELEGATE_PRIVATE_KEY>",
"HPP_NETWORK": "<HPP_NETWORK>",
"RESOURCE_SERVER_URL": "<RESOURCE_SERVER_URL>",
"SAFE_ADDRESS": "<SAFE_ADDRESS>",
"ALLOWANCE_MODULE_ADDRESS": "<ALLOWANCE_MODULE_ADDRESS>"
}
}
}
}{
"servers": {
"x402-mcp-bridge": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@hpp-io/[email protected]"
],
"env": {
"DELEGATE_PRIVATE_KEY": "<DELEGATE_PRIVATE_KEY>",
"HPP_NETWORK": "<HPP_NETWORK>",
"RESOURCE_SERVER_URL": "<RESOURCE_SERVER_URL>",
"SAFE_ADDRESS": "<SAFE_ADDRESS>",
"ALLOWANCE_MODULE_ADDRESS": "<ALLOWANCE_MODULE_ADDRESS>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
DELEGATE_PRIVATE_KEYOptional, secret | Delegate EOA private key used to sign payments. Auto-created in the OS keychain if unset. |
HPP_NETWORKOptional | Target network: eip155:181228 (HPP Sepolia, default) or eip155:190415 (HPP Mainnet). |
RESOURCE_SERVER_URLOptional | Optional upstream MCP server to proxy. Omit to expose only the local tools. |
SAFE_ADDRESSOptional | Safe address for governance (Safe) mode. Set together with ALLOWANCE_MODULE_ADDRESS. |
ALLOWANCE_MODULE_ADDRESSOptional | Safe AllowanceModule address for governance (Safe) mode. Set together with SAFE_ADDRESS. |
Details
| Package | @hpp-io/[email protected] (NPM, stdio) |
| First published | 12 Nov 2026 |
| Last updated | 12 Nov 2026 |
| Registry name | io.github.hpp-io/x402-mcp-bridge |
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