X402 Gateway

Name: X402 Gateway
Author: Gentech-Labs

by Gentech-Labsversion 1.0.0i★ –iRuns in the cloud

Registry namenet.gentechlabs/x402-gateway

Install

Overview

Description from the maker (original English)

Pay-per-call x402 services for agents: risk scoring, DeFi, wallet and market data.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Accounting, finance & tax

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://api.gentechlabs.net/mcp

Run this in your terminal

claude mcp add --transport http x402-gateway https://api.gentechlabs.net/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "x402-gateway": {
      "url": "https://api.gentechlabs.net/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "x402-gateway": {
      "type": "http",
      "url": "https://api.gentechlabs.net/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://api.gentechlabs.net/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

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

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain gentechlabs.net (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Accounting, finance & taxi

More stars than 0% of the other 2908 servers in this category
Published to the registry more recently than 40% of the other 2908 servers in this category
Basic checks equal to or better than 100% of the other 2908 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 X402 Gateway safe?

It passed 1 of 1 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

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

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SolidInvoice

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Korea Tax Calculator

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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.

programmable-money-x402

Encode Club Programmable Money Hackathon — Circle × Arc

*Track: Agentic Economy — AI agents that hold wallets, pay and transact autonomously in USDC*

Repo (public): https://github.com/Gentech-Labs/programmable-money-x402

The Problem

AI agents need to pay for APIs, compute, and data — but there's no standard way to do it programmatically. Every integration means manual API keys, subscriptions, or custom payment flows. Real agent autonomy requires programmable money.

The Solution

x402 on Arc — a payment gateway that bridges Circle's USDC infrastructure with the HTTP 402 Payment Required standard:

An agent calls an API → gets HTTP 402 with payment requirements
The agent pays USDC on Arc (sub-second settlement, USDC fees)
Access is granted — no API keys, no signups, no human in the loop

This is programmable money for the agent economy.

Architecture

Agent → HTTP Request → x402 Middleware → HTTP 402 + Arc USDC invoice

↓ ↓ Access Granted ← Payment Verified ← Agent pays USDC on Arc

Track Focus

Agentic Economy — AI agents hold wallets on Arc, pay for services in USDC autonomously, using Circle's stablecoin-native L1 for sub-second settlement.

Components

x402 Gateway — middleware that drops into any API, handles 402 → payment → access
Arc Settlement Layer — USDC transfers via Circle's infrastructure on Arc
Agent SDK — one function call for any agent to pay x402 APIs
Playground — test transactions, manage wallets, see the flow live

Why Arc + Circle

Arc is built for this — USDC as the native fee token, sub-second finality, and programmable wallet infrastructure. x402 on Arc means agents settle payments in the same block they're requested.

Deployment (LIVE on Arc testnet)

ArcAgentWallet.sol — autonomous agent wallet contract — deployed and verified on-chain:

Field	Value
Network	Arc testnet (chain ID `5042002`)
Contract	`0x79ec00506db1ea123752084ebf1d4f26e0655287`
Deploy tx	`0x3b6085b19997ff34a706cb0c746f29f7cba8773a9e8b930da44e93f1dc7f6d85`
Block	55,009,063
Deployer	`0xB6c0C5859Df4fA84bD17727e468e297006a05a3c` (test wallet, funded with faucet USDC)
Status	✅ Success (gas used 1,757,302)
Runtime bytecode	7,880 bytes verified on-chain
Explorer	https://testnet.arcscan.app/tx/0x3b6085b19997ff34a706cb0c746f29f7cba8773a9e8b930da44e93f1dc7f6d85

What the deployed contract does: the agent wallet autonomously holds USDC, can be funded by any party, and executes agent-initiated transfers with a safety timeout — programmable money for agents, live on Circle's Arc L1.

Team

Jordan Jones — GenTech Labs

Timeline

Week	Milestone
Week 1	✅ Project setup, architecture defined
Week 2	✅ x402 gateway + Arc/Circle integration
Week 3	✅ Agent SDK + end-to-end flow
Week 4	✅ MVP deployed on Arc testnet (Aug 2) — demo, video, submission

X402 Gateway

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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

Compared with others in Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

programmable-money-x402

The Problem

The Solution

Architecture

Track Focus

Components

Why Arc + Circle

Deployment (LIVE on Arc testnet)

Team

Timeline