agentmods.dev

x402-mcp

x402-mcp is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from nirholas/three.ws. Its token cost is not measured, scanned A, original, Apache-2.0.

A local service that lets an AI agent pay for online services from a wallet controlled by its own private key, using USDC or $THREE on Solana.

In plain words
What is it for?
Use it when configuring agent payments through the x402 protocol; it requires five environment variables, including a Solana key, RPC address, spending limit, confirmation setting, and service URL.
Why use it?
It provides a way for the agent to make payments without handing wallet custody to another service, while allowing a spending limit and confirmation requirement.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

One of 45 entries in server.json — they are configured in one file and arrive together.

not rated 110 today A scan tokens not measured original Apache-2.0
View the source file nirholas/three.ws
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/nirholas/three.ws/x402-mcp
Clone the repo
git clone --depth 1 https://github.com/nirholas/three.ws

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for x402-mcp

README.md
[![agentmods](https://agentmods.dev/badge/mcp/nirholas/three.ws/x402-mcp.svg)](https://agentmods.dev/mcp/nirholas/three.ws/x402-mcp)
Your own site
<a href="https://agentmods.dev/mcp/nirholas/three.ws/x402-mcp"><img src="https://agentmods.dev/badge/mcp/nirholas/three.ws/x402-mcp.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

x402-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

mcp-bridge/server.json · 16 lines

What it actually says

{
  "x402-mcp": {
    "command": "npx",
    "args": [
      "-y",
      "@three-ws/x402-mcp"
    ],
    "env": {
      "SOLANA_SECRET_KEY": "",
      "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com",
      "MAX_PAY_USD": "1",
      "REQUIRE_CONFIRM": "true",
      "THREE_WS_BASE": "https://three.ws"
    }
  }
}
Same file

What else server.json configures

This page is one entry in a file that holds 45. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 16 lines scan A 8725e2bf7764

Subscribe to this mod's changes

x402-mcp is an MCP server published in the GitHub repository nirholas/three.ws (110 stars, last pushed today), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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