HPP x402 MCP Bridge

Name: HPP x402 MCP Bridge
Author: hpp-io

by hpp-ioversion 0.1.26i★ 0iRuns on your computer

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

How to install

What it does

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

Connects Runs on your computer
Account or key Needs DELEGATE_PRIVATE_KEY
Category Other

Install

Pick the AI app you use, then copy the settings.

Passed 2/3 checks · Runs on your computer · ✓ Commands checked Nov 14, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a HPP x402 MCP Bridge key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the HPP x402 MCP Bridge site ↗
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@hpp-io/x402-mcp-bridge"
      ],
      "env": {
        "DELEGATE_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use HPP x402 MCP Bridge and tell me what you can do for me, then show me one thing
✓ If Claude says it is using HPP x402 MCP Bridge or shows a HPP x402 MCP Bridge tool in the answer, you are connected

4 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

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.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect HPP x402 MCP Bridge yet

HPP x402 MCP Bridge runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect HPP x402 MCP Bridge

Steps for Claude →You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)

B · Others in Other that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Hostinger✓ ChatGPT
World Monitor✓ ChatGPT
Svelte MCP✓ ChatGPT

Works with Claude Code, with some setup first

You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a HPP x402 MCP Bridge key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the HPP x402 MCP Bridge site ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add --scope user x402-bridge --env DELEGATE_PRIVATE_KEY=your-value -- npx -y @hpp-io/x402-mcp-bridge
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see HPP x402 MCP Bridge listed as connected
Done
Try it
Use HPP x402 MCP Bridge and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using HPP x402 MCP Bridge or shows a HPP x402 MCP Bridge tool in the answer, you are connected

4 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

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.

Descriptions are as written by the maker.

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a HPP x402 MCP Bridge key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the HPP x402 MCP Bridge site ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the HPP x402 MCP Bridge settings, DELEGATE_PRIVATE_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use HPP x402 MCP Bridge and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using HPP x402 MCP Bridge or shows a HPP x402 MCP Bridge tool in the answer, you are connected

4 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

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.

Descriptions are as written by the maker.

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a HPP x402 MCP Bridge key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a HPP x402 MCP Bridge key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the HPP x402 MCP Bridge site ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the HPP x402 MCP Bridge settings, DELEGATE_PRIVATE_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use HPP x402 MCP Bridge and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using HPP x402 MCP Bridge or shows a HPP x402 MCP Bridge tool in the answer, you are connected

4 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

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.

Descriptions are as written by the maker.

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use HPP x402 MCP Bridge💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user x402-bridge --env DELEGATE_PRIVATE_KEY=your-value -- npx -y @hpp-io/x402-mcp-bridge

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@hpp-io/x402-mcp-bridge"
      ],
      "env": {
        "DELEGATE_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "x402-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@hpp-io/x402-mcp-bridge"
      ],
      "env": {
        "DELEGATE_PRIVATE_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "x402-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@hpp-io/x402-mcp-bridge"
      ],
      "env": {
        "DELEGATE_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Values you fill in

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

Descriptions are as written by the maker.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 0
Downloads per weeki: 437/wk
Licence i: No licence stated
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.1.26
Categoryi: Other
Published to registryi: Nov 12, 2026
Code last changedi: Nov 12, 2026
Maker: hpp-io
Packages: npm: @hpp-io/x402-mcp-bridge
Repo: hpp-io/x402-mcp-bridge
Website: docs.hpp.io
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 14, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account hpp-io, which owns the repo
✓ Pass
Still maintained
Code last changed 2 days ago
! Caution
Has a licence
GitHub could not identify the licence type; open the file to check
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Otheri

More stars than 0% of the other 19732 servers in this category
Published to the registry more recently than 94% of the other 19732 servers in this category
Basic checks equal to or better than 45% of the other 19732 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is HPP x402 MCP Bridge safe?

It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: DELEGATE_PRIVATE_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 2 days ago, and the latest version (0.1.26) reached the registry 2 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: World Monitor, Claude Flow, Windmill

Others in the same category

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

World Monitor

Real-time global intelligence on conflict, markets, energy, trade, shipping and cyber. 97 tools.

by koala73Widely used★ 90.6KUpdated yesterday

Runs in the cloud✓ service owner · worldmonitor.app

How to connect

Claude Flow

AI orchestration with hive-mind swarms, neural networks, and 87 MCP tools for enterprise dev.

by ruvnetWidely used↓ 13.5K/wk★ 81.6KUpdated 14 months ago

Runs on your computer

Install

Windmill

Run Windmill scripts and flows and manage jobs, schedules, resources and variables.

by windmill-labsWidely used★ 18.6KUpdated 2 days ago

Runs in the cloud

How to connect

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

@hpp-io/x402-mcp-bridge

The agent payment rail for HPP. A stdio MCP bridge + the hpp-x402 CLI that let

Claude Desktop / Claude Code / Cursor / Windsurf / OpenClaw make autonomous

HPP USDC.e payments over x402 — discover paid services,

pay per call, within a spend cap. No API keys, no manual signing.

📖 Full documentation

[hpp-io/x402-tools](https://github.com/hpp-io/x402-tools) — the complete manual: how it works, every command, buyer and seller flows, payment schemes (exact / upto), wallet modes, and troubleshooting. This README is a quick reference.

Install

# macOS / Linux

curl -fsSL https://raw.githubusercontent.com/hpp-io/x402-tools/main/install/install.sh | bash

Windows (PowerShell)

irm https://raw.githubusercontent.com/hpp-io/x402-tools/main/install/install.ps1 | iex

…or npm

npm install -g @hpp-io/x402-mcp-bridge

Needs Node 20+. On a headless box (no OS keychain) use setup --print-key — see the manual.

Quick start

hpp-x402 setup --install claude-code   # create a wallet + register into your host

hpp-x402 fund # where to send USDC.e (gasless, no native gas) hpp-x402 status # confirm it's wired

Restart your host and your agent can discover and pay for services. Browse and pay from the terminal too:

hpp-x402 discover "price prediction"               # semantic search; your network only

hpp-x402 describe # input args (schema + example) — no payment hpp-x402 call --body '{"hi":"there"}' # pay + call — a URL, or an id from discover

Pay from your HPP Smart Wallet instead

Rather than funding the agent's key, let it pay from your HPP Smart Wallet under a spending limit you set. In the wallet, open Agents → New, paste the agent's address (hpp-x402 wallet address), issue the delegation, then run the command the wallet shows — it is this, with the value filled in:

hpp-x402 install claude-code -n eip155:190415 --delegation 0x…

Run it on the machine where the agent's key lives. The value is checked against that key and the network before it is written, and again each time the bridge starts. The value can only be used by that key, within the limit, until it expires — but it does end up in your shell history, so treat it like a card with a cap. To stop the agent, revoke the delegation in the wallet.

Full command reference, selling (serve), schemes, and Safe mode → the [manual](https://github.com/hpp-io/x402-tools).

Use it from an MCP host

The host spawns the bridge over stdio. A bare entry boots zero-config on HPP Sepolia with an auto-created keychain wallet:

{ "mcpServers": { "hpp-x402": {

"command": "npx", "args": ["-y", "@hpp-io/x402-mcp-bridge"] } } }

hpp-x402 install writes this for you. Note: a bare npx @hpp-io/x402-mcp-bridge runs the MCP server (what the host wants) — for the CLI use npx -y -p @hpp-io/x402-mcp-bridge hpp-x402 .

Host-facing tools

Tool	What it does
`wallet_address`	report your wallet address (to fund it)
`hpp_discover`	list/search the curated HPP directory (read-only)
`hpp_describe`	one service's input args — schema + example (read-only)
`hpp_call`	call a discovered service (HTTP/MCP/A2A); pays via your wallet
`x402_http_call`	pay + call any x402 HTTP endpoint
`pay_a2a_agent`	pay + message another A2A agent

Every paid call stays within your spend cap (per-call cap defaults to 1 USDC.e; raise it with wallet_set_limit) and is paid only in allowlisted tokens; discovery never holds funds or sees your keys.

Key env (all optional)

Var	Notes
`DELEGATE_PRIVATE_KEY`	auto-created in the OS keychain if unset
`HPP_NETWORK`	`eip155:181228` Sepolia (default) / `eip155:190415` Mainnet
`HPP_X402_ALLOWED_ASSETS`	extra tokens the bridge may pay in (comma-separated addresses). By default only USDC.e (both networks) and HAC (Sepolia test token); a 402 priced in any other token is refused before signing
`RESOURCE_SERVER_URL`	proxy one upstream MCP server (omit = local tools only)
`SAFE_ADDRESS` + `ALLOWANCE_MODULE_ADDRESS`	set both = Safe (governance) mode
`HPP_PAYMENT_DELEGATION`	ERC-7710 payment delegation a wallet granted to this key: pays `erc7710` accepts from the user's smart account under on-chain caps — this key needs no USDC.e. `hpp-x402 install --delegation` writes it. Checked against the key and the network at install and at boot (a value issued on the other network, revoked, or expired stops the bridge with the reason); without it such accepts are skipped

Full environment reference + Safe/governance setup are in the manual.

Building an agent / SDK integration (LangChain, OpenAI function-calling, AgentKit, A2A)? See the runnable gallery → hpp-io/hpp-x402-agent-sample

License

Apache-2.0

HPP x402 MCP Bridge

What it does

Install

Install Node.js

Sign up and create a HPP x402 MCP Bridge key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a HPP x402 MCP Bridge key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a HPP x402 MCP Bridge key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a HPP x402 MCP Bridge key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Discussion

User reviews

Compared with others in Otheri

Common questions

Others in the same category

World Monitor

Claude Flow

Windmill

README from the maker

@hpp-io/x402-mcp-bridge

📖 Full documentation

Install

Windows (PowerShell)

…or npm

Quick start

Pay from your HPP Smart Wallet instead

Use it from an MCP host

Host-facing tools

Key env (all optional)

Related

License