Is Vet402 Plugin free?

Yes, Vet402 Plugin is free to use.

How do I install Vet402 Plugin?

Vet402 Plugin is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Vet402 Plugin safe to use?

Yes. Vet402 Plugin passed MCP Marketplace's automated security scan with a score of 10/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What AI apps work with Vet402 Plugin?

Vet402 Plugin uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Vet402 Plugin MCP Server

by Kzmttkc

Developer ToolsLow Risk10.0MCP RegistryRemote

Free

Server data from the Official MCP Registry

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

About

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

Remote endpoints: streamable-http: https://vet402.com/mcp

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.

3 tools verified · Open access · No issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Found in Source Code

Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "com-vet402-vet402": {
      "url": "https://vet402.com/mcp"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

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

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4.8

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