external-call-safety

external-call-safety is a plugin for Claude Code from quillai-network/quillshield_skills. Its manifest loads nothing; the 1 skill it bundles cost 99 tokens per session together, scanned A, original, MIT.

A security checker for smart contracts that call other contracts or work with tokens. It covers ordinary and low-level calls, token behaviors such as transfer fees and rebasing, and callback-based token standards.

In plain words
What is it for?
Use it when reviewing token transfers, refunds, rewards, airdrops, ETH payments, cross-contract calls, or claims of support for any ERC20 token.
Why use it?
It helps find failures that are ignored, token behavior that breaks the contract's assumptions, unsafe approvals, and unusually large return data. These issues often appear when a contract supports many different tokens.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it when reviewing token transfers, refunds, rewards, airdrops, ETH payments, cross-contract calls, or claims of support for any ERC20 token.

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Install in Claude Code
/plugin marketplace add quillai-network/quillshield_skills/plugin install external-call-safety
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.

Clone the repo
git clone --depth 1 https://github.com/quillai-network/quillshield_skills

Made for: Claude Code.

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 external-call-safety

README.md
[![agentmods](https://agentmods.dev/badge/plugins/quillai-network/quillshield_skills/external-call-safety/github.svg)](https://agentmods.dev/plugins/quillai-network/quillshield_skills/external-call-safety)
Your own site
<a href="https://agentmods.dev/plugins/quillai-network/quillshield_skills/external-call-safety"><img src="https://agentmods.dev/badge/plugins/quillai-network/quillshield_skills/external-call-safety/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for external-call-safety

Your own site · 80×15
<a href="https://agentmods.dev/plugins/quillai-network/quillshield_skills/external-call-safety"><img src="https://agentmods.dev/badge/plugins/quillai-network/quillshield_skills/external-call-safety.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 99 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

external-call-safety 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 9d 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.

plugins/external-call-safety/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "external-call-safety",
  "version": "1.0.0",
  "description": "Detects unsafe external call patterns and token integration vulnerabilities in smart contracts. Covers unchecked call return values, fee-on-transfer tokens, rebasing tokens, missing ERC20 return values (USDT), ERC-777 callback risks, unsafe approve patterns, return data bombs, and pull vs push payment analysis. Addresses OWASP SC06.",
  "author": {
    "name": "QuillShield",
    "url": "https://github.com/quillai-network"
  }
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 99 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. 9d ago First seen · 10 lines scan A d4657c226887

Subscribe to this mod's changes

external-call-safety is a plugin published in the GitHub repository quillai-network/quillshield_skills (121 stars, last pushed 5mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

Related

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