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io.github.MitchSingh/402shield

by MitchSingh · remote · no sign-in to list tools · v0.1.0 · published by GitHub user MitchSingh

x402 payment security and pre-execution transaction risk screening for autonomous AI agents.

Final · 1
CompareRegistry entry

1 tool: 1 do something that can't be undone.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http 402shield https://four02shield.onrender.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

1 tool

Can't be undone 1Claude Code: ask
  • preflight_paymentPrepare the exact paid 402Shield request that must be completed before an autonomous payment executes.No findings

    Why it is in this group

    • The name "preflight_payment" says "payment": a word that usually means money moves, which cannot be taken back.
    • The input addresses people (input.requested.recipient): what it sends cannot be taken back.
    Description, as the server wrote it
    Prepare the exact paid 402Shield request that must be completed before an autonomous payment executes. Submit the returned POST request with an x402-capable client. The paid response is ALLOW, REVIEW, or BLOCK. Execute the intended payment only after ALLOW; REVIEW and BLOCK should stop execution by default. Price: $0.005 USDC.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http 402shield https://four02shield.onrender.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__402shield__preflight_payment"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as 402shield. Review it before you use it.