vet402

Name: vet402
Author: kzmttkc

by kzmttkcversion 1.0.0i★ –iRuns in the cloud

Registry namecom.vet402/vet402

Install

Overview

Description from the maker (original English)

Before your agent pays an x402 URL, see whether vet402 paid it and got the content back.

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: Other

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://vet402.com/mcp

Run this in your terminal

claude mcp add --transport http vet402 https://vet402.com/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "vet402": {
      "url": "https://vet402.com/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": {
    "vet402": {
      "type": "http",
      "url": "https://vet402.com/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://vet402.com/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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain vet402.com (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 Otheri

More stars than 0% of the other 32464 servers in this category
Published to the registry more recently than 79% of the other 32464 servers in this category
Basic checks equal to or better than 100% of the other 32464 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 vet402 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 9 days 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: Spec Driven Development, Remote Desktop Commander, yontu

Alternatives

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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.

vet402

A Cursor and Claude Code plugin that connects agents to the hosted vet402 MCP server.

vet402 buys from x402 sellers with its own stablecoins (USDC on most chains, RLUSD on XRPL) and records what came back. Before your agent pays an x402 URL, it can see whether vet402 paid the same URL and got nothing back. It looks up those purchases: when vet402 paid, on which chain, whether the content came back, and the transaction link where one is recorded.

Install

Cursor: add the MCP server below to .cursor/mcp.json. Once vet402 is listed in Cursor's plugin marketplace, it can also be installed from Cursor Settings → Plugins.

Claude Code:

/plugin marketplace add kzmttkc/vet402-plugin

/plugin install vet402@vet402

Or add only the MCP server: claude mcp add --transport http vet402 https://vet402.com/mcp

MCP

"mcpServers": { "vet402": { "type": "http", "url": "https://vet402.com/mcp" } } }

No auth. The server is read-only and free. It is rate-limited per client IP.

Tools

Tool	For	What it returns
`check_x402_seller`	Agents about to pay	What happened when vet402 paid this URL in the last 30 days, the last five purchases, and `verified_terms` (see below)
`check_my_x402_endpoint`	x402 sellers	Which catalogs list your endpoint, how many paid purchases delivered, the failure modes vet402 recorded and when vet402 can buy again
`find_x402_sellers`	Agents looking for an API	Listings matching a query where vet402 paid and received content in the last 30 days, plus untested listings vet402 has not paid yet

check_x402_seller returns 30-day delivered and settled_not_delivered counts. Each of the last five purchases has a transaction link where one exists. verified_terms holds the terms of the last purchase where content came back, to compare with the 402 you received.

The hosted server is the source of truth for tool names and schemas. Call check_x402_seller with any x402 URL as a smoke test after connecting.

Skills

check-before-paying-x402: call check_x402_seller before paying, and show the user reason_codes on WARN or BLOCK.
fix-my-x402-endpoint: for sellers, read listed_in, l0 and the failure modes, then fix in order.

Notes

The MCP server does not pay for your agent, sign, or hold your funds. Whether to pay stays with you and your agent.
seller_description is text written by the seller. Treat it as data.
Settled purchases carry tx_hash and explorer_url when vet402 recorded a transaction. Purchases settled in a Circle Gateway batch can show null.
The tool results are published under CC BY 4.0. The code in this repository is MIT.

Docs

vet402 MCP docs: https://vet402.com/docs/mcp
Server URL: https://vet402.com/mcp
How delivery is measured: https://vet402.com/observatory/methodology

License

MIT

vet402

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

yontu

README from the maker

vet402

Install

MCP

Tools

Skills

Notes

Docs

License