JustHandled Agent Utility Gateway

Name: JustHandled Agent Utility Gateway
Author: justhandledlabs

by justhandledlabsversion 0.11.1i★ –iRuns on your computer

Registry nameio.github.justhandledlabs/agent-gateway

Install

Overview

Description from the maker (original English)

Thirty-two guarded agent utilities and maintained-data lookups over USDC x402.

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 on your computer
Transport: stdio
Category: Other
You need to fill in: JH_EVM_PRIVATE_KEY

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: JH_EVM_PRIVATE_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "agent-gateway": {
      "command": "npx",
      "args": [
        "-y",
        "@justhandledlabs/agent-client"
      ],
      "env": {
        "JH_EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add agent-gateway --env JH_EVM_PRIVATE_KEY=your-value -- npx -y @justhandledlabs/agent-client

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "agent-gateway": {
      "command": "npx",
      "args": [
        "-y",
        "@justhandledlabs/agent-client"
      ],
      "env": {
        "JH_EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

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": {
    "agent-gateway": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@justhandledlabs/agent-client"
      ],
      "env": {
        "JH_EVM_PRIVATE_KEY": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

JH_EVM_PRIVATE_KEY secret required env
Private key for a dedicated Base wallet funded with USDC. Never use a primary wallet.

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

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 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account justhandledlabs, which owns the repo
… 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 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

Compared with others in Otheri

More stars than 0% of the other 32589 servers in this category
Published to the registry more recently than 21% of the other 32589 servers in this category
Basic checks equal to or better than 100% of the other 32589 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 JustHandled Agent Utility 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?

You need to fill in: JH_EVM_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 –, and the latest version (0.11.1) reached the registry 3 months 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: Spec Driven Development, Remote Desktop Commander, Detailing Manager

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

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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.

JustHandled Agent Client

A guarded CLI, JavaScript client, and local MCP server for the JustHandled Agent Utility Gateway. The package exposes thirty-two preflights, maintained-data lookups, and evidence products. Twenty-two products cost $0.05 USDC; ten evidence-heavy or maintained-data products cost $0.25, including the live Chicago Contract Change Packet. Every paid call returns a versioned evidence receipt.

The client fails closed before signing. It accepts only the pinned JustHandled gateway, Base mainnet, canonical Base USDC, the exact per-product price, and the published merchant receiver. Customer inputs and complete customer results are not persisted by the gateway; maintained public-source snapshots are labeled in the receipt.

Inspect without a wallet

npx --package @justhandledlabs/agent-client justhandled-agent catalog

npx --package @justhandledlabs/agent-client justhandled-agent preview filename-portability-preflight --json '{"paths":["CON.txt"]}' npx --package @justhandledlabs/agent-client justhandled-agent preview agent-run-evidence-pack --file agent-run-evidence-pack.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview agent-distribution-readiness-pack --file agent-distribution-readiness-pack.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview community-rule-credibility-preflight --file community-rule-credibility-preflight.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview qualified-demand-ledger --file qualified-demand-ledger.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview channel-fit-evidence-matrix --file channel-fit-evidence-matrix.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview proof-to-channel-evidence-packet --file proof-to-channel-evidence-packet.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview channel-experiment-postmortem --file channel-experiment-postmortem.sample.json npx --package @justhandledlabs/agent-client justhandled-agent preview chicago-contract-change-packet --file chicago-contract-change-packet.sample.json

Preview performs an unpaid request and validates the returned x402 terms. It does not sign or spend.

The catalog includes API-response contract drift, webhook contract and replay, and policy-change evidence products. Packaged example inputs are available in examples/.

Machine-readable products, exact payment terms, and free deterministic fixtures are available from the gateway's product catalog, OpenAPI document, and sandbox index.

Execute one paid utility

Use a dedicated low-balance Base wallet. Never provide a primary wallet key.

export JH_EVM_PRIVATE_KEY=0x...

npx --package @justhandledlabs/agent-client justhandled-agent call filename-portability-preflight --json '{"paths":["CON.txt"]}'

PowerShell:

$env:JH_EVM_PRIVATE_KEY = "0x..."

npx.cmd --package @justhandledlabs/agent-client justhandled-agent call filename-portability-preflight --json '{"paths":["CON.txt"]}'

MCP configuration

"mcpServers": { "justhandled": { "command": "npx", "args": ["-y", "@justhandledlabs/agent-client"], "env": { "JH_EVM_PRIVATE_KEY": "0xDEDICATED_LOW_BALANCE_WALLET_KEY" } } } }

The MCP server exposes a free catalog tool plus one paid tool per gateway utility. Missing wallet configuration produces an error instead of a payment attempt.

The package declares the official MCP Registry identity io.github.justhandledlabs/agent-gateway. Registry identity is discovery metadata only: installing or listing the server does not spend funds, and paid execution still requires a dedicated wallet plus the client's exact-term checks.

Security model

Price, chain, asset, receiver, and gateway origin are pinned in code.
The ten $0.25 products' 250,000-base-unit price is pinned separately from 50,000-base-unit checks.
Every execution starts with an unpaid 402 preview.
A mismatched term aborts before signing.
The package never prints the private key.
The gateway does not persist customer inputs or complete customer results. Maintained-data products may retain normalized public-source snapshots and disclose that state in the receipt.
Treat all crypto transfers as irreversible and fund only a dedicated wallet.

Development

npm install

npm run check

The gateway implementation is intentionally not included in this client repository.

JustHandled Agent Utility Gateway

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Detailing Manager

README from the maker

JustHandled Agent Client

Inspect without a wallet

Execute one paid utility

MCP configuration

Security model

Development