# io.github.kaito3636/x402-presign-guard (npm · x402-presign-guard)

Pre-sign EVM tx/approval safety for AI agents: decode calldata, flag drainers, return GO/HOLD/BLOCK.

- Trust score: 65/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `x402-presign-guard`: 65/100 (this document), [markdown](https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard.md), [page](https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard)

## Channel facts

- Registry: `npm`
- Package: `x402-presign-guard`
- Version: `0.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects hono 4.6.14, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 94 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 11 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 61/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 164 tokens (~82/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.kaito3636/x402-presign-guard MCP server?

io.github.kaito3636/x402-presign-guard runs locally as an npm package, launched with npx -y x402-presign-guard. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add kaito3636-x402-presign-guard -- npx -y x402-presign-guard
```

### Cursor

```json
{
  "mcpServers": {
    "kaito3636-x402-presign-guard": {
      "command": "npx",
      "args": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "kaito3636-x402-presign-guard": {
      "command": "npx",
      "args": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add kaito3636-x402-presign-guard -- npx -y x402-presign-guard
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "kaito3636-x402-presign-guard": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "x402-presign-guard"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add kaito3636-x402-presign-guard --command npx --arg -y --arg x402-presign-guard
```

### Hermes

```yaml
mcp_servers:
  kaito3636-x402-presign-guard:
    command: "npx"
    args: ["-y", "x402-presign-guard"]
```

### Netclaw

```json
{
  "McpServers": {
    "kaito3636-x402-presign-guard": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add kaito3636-x402-presign-guard -t stdio -c npx -a -y x402-presign-guard
```

### Other

```json
{
  "mcpServers": {
    "kaito3636-x402-presign-guard": {
      "command": "npx",
      "args": [
        "-y",
        "x402-presign-guard"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 65, 0)

- [security regression] CVE-2026-56764 affects this package: high
- [security regression] CVE-2026-56763 affects this package: high
- [security regression] CVE-2026-44459 affects this package: high
- [security regression] CVE-2026-24771 affects this package: high
- [security regression] CVE-2026-29086 affects this package: high
- [security regression] CVE-2026-29045 affects this package: high
- [security regression] CVE-2026-24398 affects this package: high
- [security regression] CVE-2026-39407 affects this package: high
- [security regression] CVE-2026-71850 affects this package: high
- [security regression] CVE-2025-59139 affects this package: high
- [security regression] CVE-2026-54286 affects this package: high
- [security regression] CVE-2026-47674 affects this package: high
- [security regression] CVE-2026-39410 affects this package: high
- [security regression] CVE-2026-54287 affects this package: high
- [security regression] CVE-2026-56762 affects this package: high
- [security regression] CVE-2026-29085 affects this package: high
- [security regression] CVE-2026-44458 affects this package: high
- [security regression] CVE-2026-54288 affects this package: high
- [security regression] CVE-2026-69207 affects this package: high
- [security regression] CVE-2026-44456 affects this package: high
- [security regression] CVE-2026-39408 affects this package: high
- [security regression] CVE-2026-54290 affects this package: high
- [security regression] CVE-2026-44455 affects this package: high
- [security regression] CVE-2026-44457 affects this package: high
- [security regression] CVE-2026-22817 affects this package: high
- [security regression] CVE-2026-84364 affects this package: high
- [security regression] CVE-2026-84363 affects this package: high
- [security regression] CVE-2026-56761 affects this package: high
- [security regression] CVE-2026-39409 affects this package: high
- [security regression] CVE-2026-54289 affects this package: high
- [security regression] CVE-2026-47675 affects this package: high
- [security regression] CVE-2026-24472 affects this package: high
- [security regression] CVE-2026-47676 affects this package: high
- [security regression] CVE-2026-24473 affects this package: high
- [security regression] CVE-2026-59897 affects this package: high
- [security regression] CVE-2026-93981 affects this package: high
- [security regression] CVE-2025-71381 affects this package: high
- [security regression] CVE-2026-59895 affects this package: high
- [security regression] CVE-2026-47673 affects this package: high
- [security regression] CVE-2025-62610 affects this package: high
- [security regression] CVE-2026-118663 affects this package: high
- [security regression] CVE-2026-22818 affects this package: high
- [security regression] CVE-2026-84365 affects this package: high

### 2026-11-04 (score 65, +5)

- [security regression] CVE-2026-56764 affects this package: high
- [security regression] CVE-2026-56763 affects this package: high
- [security regression] CVE-2026-44459 affects this package: high
- [security regression] CVE-2026-24771 affects this package: high
- [security regression] CVE-2026-29086 affects this package: high
- [security regression] CVE-2026-29045 affects this package: high
- [security regression] CVE-2026-24398 affects this package: high
- [security regression] CVE-2026-39407 affects this package: high
- [security regression] CVE-2026-71850 affects this package: high
- [security regression] CVE-2025-59139 affects this package: high
- [security regression] CVE-2026-54286 affects this package: high
- [security regression] CVE-2026-47674 affects this package: high
- [security regression] CVE-2026-39410 affects this package: high
- [security regression] CVE-2026-54287 affects this package: high
- [security regression] CVE-2026-56762 affects this package: high
- [security regression] CVE-2026-29085 affects this package: high
- [security regression] CVE-2026-44458 affects this package: high
- [security regression] CVE-2026-54288 affects this package: high
- [security regression] CVE-2026-69207 affects this package: high
- [security regression] CVE-2026-44456 affects this package: high
- [security regression] CVE-2026-39408 affects this package: high
- [security regression] CVE-2026-54290 affects this package: high
- [security regression] CVE-2026-44455 affects this package: high
- [security regression] CVE-2026-44457 affects this package: high
- [security regression] CVE-2026-22817 affects this package: high
- [security regression] CVE-2026-84364 affects this package: high
- [security regression] CVE-2026-84363 affects this package: high
- [security regression] CVE-2026-56761 affects this package: high
- [security regression] CVE-2026-39409 affects this package: high
- [security regression] CVE-2026-54289 affects this package: high
- [security regression] CVE-2026-47675 affects this package: high
- [security regression] CVE-2026-24472 affects this package: high
- [security regression] CVE-2026-47676 affects this package: high
- [security regression] CVE-2026-24473 affects this package: high
- [security regression] CVE-2026-59897 affects this package: high
- [security regression] CVE-2026-93981 affects this package: high
- [security regression] CVE-2025-71381 affects this package: high
- [security regression] CVE-2026-59895 affects this package: high
- [security regression] CVE-2026-47673 affects this package: high
- [security regression] CVE-2025-62610 affects this package: high
- [security regression] CVE-2026-118663 affects this package: high
- [security regression] CVE-2026-22818 affects this package: high
- [security regression] CVE-2026-84365 affects this package: high
- [functional improvement] Stability: unverified → 0.37

### 2026-11-03 (score 60, 0)

- [security regression] CVE-2026-56764 affects this package: high
- [security regression] CVE-2026-56763 affects this package: high
- [security regression] CVE-2026-44459 affects this package: high
- [security regression] CVE-2026-24771 affects this package: high
- [security regression] CVE-2026-29086 affects this package: high
- [security regression] CVE-2026-29045 affects this package: high
- [security regression] CVE-2026-24398 affects this package: high
- [security regression] CVE-2026-39407 affects this package: high
- [security regression] CVE-2026-71850 affects this package: high
- [security regression] CVE-2025-59139 affects this package: high
- [security regression] CVE-2026-54286 affects this package: high
- [security regression] CVE-2026-47674 affects this package: high
- [security regression] CVE-2026-39410 affects this package: high
- [security regression] CVE-2026-54287 affects this package: high
- [security regression] CVE-2026-56762 affects this package: high
- [security regression] CVE-2026-29085 affects this package: high
- [security regression] CVE-2026-44458 affects this package: high
- [security regression] CVE-2026-54288 affects this package: high
- [security regression] CVE-2026-69207 affects this package: high
- [security regression] CVE-2026-44456 affects this package: high
- [security regression] CVE-2026-39408 affects this package: high
- [security regression] CVE-2026-54290 affects this package: high
- [security regression] CVE-2026-44455 affects this package: high
- [security regression] CVE-2026-44457 affects this package: high
- [security regression] CVE-2026-22817 affects this package: high
- [security regression] CVE-2026-84364 affects this package: high
- [security regression] CVE-2026-84363 affects this package: high
- [security regression] CVE-2026-56761 affects this package: high
- [security regression] CVE-2026-39409 affects this package: high
- [security regression] CVE-2026-54289 affects this package: high
- [security regression] CVE-2026-47675 affects this package: high
- [security regression] CVE-2026-24472 affects this package: high
- [security regression] CVE-2026-47676 affects this package: high
- [security regression] CVE-2026-24473 affects this package: high
- [security regression] CVE-2026-59897 affects this package: high
- [security regression] CVE-2026-93981 affects this package: high
- [security regression] CVE-2025-71381 affects this package: high
- [security regression] CVE-2026-59895 affects this package: high
- [security regression] CVE-2026-47673 affects this package: high
- [security regression] CVE-2025-62610 affects this package: high
- [security regression] CVE-2026-118663 affects this package: high
- [security regression] CVE-2026-22818 affects this package: high
- [security regression] CVE-2026-84365 affects this package: high

### 2026-11-02 (score 60, 0)

- [security regression] CVE-2026-56764 affects this package: high
- [security regression] CVE-2026-56763 affects this package: high
- [security regression] CVE-2026-44459 affects this package: high
- [security regression] CVE-2026-24771 affects this package: high
- [security regression] CVE-2026-29086 affects this package: high
- [security regression] CVE-2026-29045 affects this package: high
- [security regression] CVE-2026-24398 affects this package: high
- [security regression] CVE-2026-39407 affects this package: high
- [security regression] CVE-2026-71850 affects this package: high
- [security regression] CVE-2025-59139 affects this package: high
- [security regression] CVE-2026-54286 affects this package: high
- [security regression] CVE-2026-47674 affects this package: high
- [security regression] CVE-2026-39410 affects this package: high
- [security regression] CVE-2026-54287 affects this package: high
- [security regression] CVE-2026-56762 affects this package: high
- [security regression] CVE-2026-29085 affects this package: high
- [security regression] CVE-2026-44458 affects this package: high
- [security regression] CVE-2026-54288 affects this package: high
- [security regression] CVE-2026-69207 affects this package: high
- [security regression] CVE-2026-44456 affects this package: high
- [security regression] CVE-2026-39408 affects this package: high
- [security regression] CVE-2026-54290 affects this package: high
- [security regression] CVE-2026-44455 affects this package: high
- [security regression] CVE-2026-44457 affects this package: high
- [security regression] CVE-2026-22817 affects this package: high
- [security regression] CVE-2026-84364 affects this package: high
- [security regression] CVE-2026-84363 affects this package: high
- [security regression] CVE-2026-56761 affects this package: high
- [security regression] CVE-2026-39409 affects this package: high
- [security regression] CVE-2026-54289 affects this package: high
- [security regression] CVE-2026-47675 affects this package: high
- [security regression] CVE-2026-24472 affects this package: high
- [security regression] CVE-2026-47676 affects this package: high
- [security regression] CVE-2026-24473 affects this package: high
- [security regression] CVE-2026-59897 affects this package: high
- [security regression] CVE-2026-93981 affects this package: high
- [security regression] CVE-2025-71381 affects this package: high
- [security regression] CVE-2026-59895 affects this package: high
- [security regression] CVE-2026-47673 affects this package: high
- [security regression] CVE-2025-62610 affects this package: high
- [security regression] CVE-2026-118663 affects this package: high
- [security regression] CVE-2026-22818 affects this package: high
- [security regression] CVE-2026-84365 affects this package: high

### 2026-11-01 (score 60, 0)

We did not load change detail this far back for this component, so this day may have recorded more than is shown.

- [security regression] CVE-2026-56764 affects this package: high
- [security regression] CVE-2026-56763 affects this package: high
- [security regression] CVE-2026-44459 affects this package: high
- [security regression] CVE-2026-24771 affects this package: high
- [security regression] CVE-2026-29086 affects this package: high
- [security regression] CVE-2026-29045 affects this package: high
- [security regression] CVE-2026-24398 affects this package: high
- [security regression] CVE-2026-39407 affects this package: high
- [security regression] CVE-2026-71850 affects this package: high
- [security regression] CVE-2025-59139 affects this package: high
- [security regression] CVE-2026-54286 affects this package: high
- [security regression] CVE-2026-47674 affects this package: high
- [security regression] CVE-2026-39410 affects this package: high
- [security regression] CVE-2026-54287 affects this package: high
- [security regression] CVE-2026-56762 affects this package: high
- [security regression] CVE-2026-29085 affects this package: high
- [security regression] CVE-2026-44458 affects this package: high
- [security regression] CVE-2026-54288 affects this package: high
- [security regression] CVE-2026-69207 affects this package: high
- [security regression] CVE-2026-44456 affects this package: high
- [security regression] CVE-2026-39408 affects this package: high
- [security regression] CVE-2026-54290 affects this package: high
- [security regression] CVE-2026-44455 affects this package: high
- [security regression] CVE-2026-44457 affects this package: high
- [security regression] CVE-2026-22817 affects this package: high
- [security regression] CVE-2026-84364 affects this package: high

### 2026-10-25 (score 60, +15)

We did not load change detail this far back for this component, so this day may have recorded more than is shown.

### 2026-10-24 (score 45)

First indexed and scored.

## MCP tools (2)

### `presign_guard_tx` (~96 tokens)

Check whether an EVM transaction is safe to sign BEFORE signing it. Decodes the calldata, flags wallet-drainer patterns (unlimited approvals, setApprovalForAll, gasless permits, transfers/approvals to known-malicious addresses) and returns a GO / HOLD / BLOCK verdict.

Input parameters:

- `chain` (string)
- `data` (string)
- `to` (string)
- `value` (string)

### `presign_guard_approval` (~68 tokens)

Check whether a token approval is safe to sign. Flags unlimited allowances and approvals to known-malicious spenders. Returns GO / HOLD / BLOCK.

Input parameters:

- `amount` (string)
- `chain` (string)
- `spender` (string, required)
- `token` (string, required)

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard#diagnostics

## Score history

- 2026-11-05: 65
- 2026-11-04: 65
- 2026-11-03: 60
- 2026-11-02: 60
- 2026-11-01: 60
- 2026-10-31: 60
- 2026-10-30: 60
- 2026-10-29: 60
- 2026-10-28: 60
- 2026-10-27: 60
- 2026-10-26: 60
- 2026-10-25: 60
- 2026-10-24: 45

## Common questions

### What is the io.github.kaito3636/x402-presign-guard MCP server?

io.github.kaito3636/x402-presign-guard is an MCP server listed in the public MCP registry as io.github.kaito3636/x402-presign-guard. Pre-sign EVM tx/approval safety for AI agents: decode calldata, flag drainers, return GO/HOLD/BLOCK. This page covers its npm package (x402-presign-guard).

### Is the io.github.kaito3636/x402-presign-guard MCP server safe to use?

io.github.kaito3636/x402-presign-guard scores 65 out of 100 on VerifyMCP. We recorded 43 known advisories against it as of 5 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.kaito3636/x402-presign-guard MCP server expose?

io.github.kaito3636/x402-presign-guard exposes 2 tools: presign_guard_tx, presign_guard_approval. Their descriptions and schemas cost roughly 164 tokens of context every time the server is loaded.

### Is the io.github.kaito3636/x402-presign-guard MCP server still maintained?

io.github.kaito3636/x402-presign-guard is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.kaito3636/x402-presign-guard MCP server under?

io.github.kaito3636/x402-presign-guard declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/x402-presign-guard
- Socket report: https://socket.dev/npm/package/x402-presign-guard
- Repository: https://github.com/kaito3636/x402-presign-guard
- Changelog RSS feed: https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard.xml
- Changelog JSON feed: https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard.json
- HTML version of this page: https://verifymcp.io/servers/kaito3636-x402-presign-guard/x402-presign-guard