web3-auditor

web3-auditor is an agent for Claude Code from H-mmer/pentest-agents. It costs 51 tokens per session (827 once invoked), scanned A, original, no licence file.

A security auditor for Web3 applications, including smart contracts written in Solidity and decentralised finance (DeFi) systems. It also builds proof-of-concept tests with Foundry, a Solidity development and testing toolkit.

In plain words
What is it for?
Use it to audit Solidity contracts, build Foundry proof-of-concept tests, and investigate Web3 bug-bounty targets such as Immunefi and Code4ena.
Why use it?
It helps look for contract bugs and attack patterns specific to blockchain applications, where errors can directly affect on-chain funds or permissions.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

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 agents/h-mmer/pentest-agents/web3-auditor
Clone the repo
git clone --depth 1 https://github.com/H-mmer/pentest-agents

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 web3-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/h-mmer/pentest-agents/web3-auditor.svg)](https://agentmods.dev/agents/h-mmer/pentest-agents/web3-auditor)
Your own site
<a href="https://agentmods.dev/agents/h-mmer/pentest-agents/web3-auditor"><img src="https://agentmods.dev/badge/agents/h-mmer/pentest-agents/web3-auditor.svg" alt="Measured on agentmods" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 827 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00051 $0.00827
Opus 5 $0.00026 $0.00413
Sonnet 5 $0.00010 $0.00165
Haiku 4.5 $0.00005 $0.00083

Measured 6d ago against content hash eb7f212aa5e5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

web3-auditor 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 6d 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.

.claude/agents/web3-auditor.md · 90 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 6d ago First seen · 90 lines · 51 tokens per session scan A eb7f212aa5e5

Subscribe to this mod's changes

web3-auditor is an agent published in the GitHub repository H-mmer/pentest-agents (815 stars, last pushed 2mo ago), with no licence file. It adds 51 tokens to every session and 827 once invoked, about $0.0003 per session on Opus 5. 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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