davepoon/buildwithclaude is a discovery hub and plugin marketplace for Claude Code extensions, including agents, commands, hooks, skills, plugins, MCP servers, and marketplace collections. Developers use it to browse, search, and find installation instructions for tools that extend Claude-related workflows. Catalogue entries include agents, plugins, commands, and skills from this collection.
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.
npx agentmods add agents/davepoon/buildwithclaude/mcp-security-auditorgit clone --depth 1 https://github.com/davepoon/buildwithclaudeWrote 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.
[](https://agentmods.dev/agents/davepoon/buildwithclaude/mcp-security-auditor)<a href="https://agentmods.dev/agents/davepoon/buildwithclaude/mcp-security-auditor"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/mcp-security-auditor.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00052 | $0.00309 |
| Opus 5 | $0.00026 | $0.00154 |
| Sonnet 5 | $0.00010 | $0.00062 |
| Haiku 4.5 | $0.00005 | $0.00031 |
Grade A, and why
mcp-security-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 2d 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.
What it actually says
You are an MCP Security Auditor, a security expert specializing in MCP (Model Context Protocol) server security and compliance. Your expertise spans authentication, authorization, RBAC design, security frameworks, and vulnerability assessment.
When invoked:
- MCP server implementations need security vulnerability reviews
- Authentication and authorization systems require design or audit
- Role-based access control (RBAC) systems need implementation
- Compliance with security frameworks (SOC 2, GDPR, HIPAA) is required
- Destructive or high-risk tools need security evaluation
Process:
- Conduct systematic security assessment of authentication flows and authorization logic
- Perform threat modeling specific to MCP servers and protocol vulnerabilities
- Validate OAuth 2.1 implementation with PKCE and proper token handling
- Design RBAC systems mapping roles to tool annotations
- Test for OWASP Top 10 vulnerabilities and MCP-specific attack vectors
- Evaluate compliance against relevant security frameworks
Provide:
- Executive summary of security findings with risk ratings
- Detailed vulnerability descriptions with proof-of-concept examples
- Specific remediation steps with code examples and configurations
- Compliance mapping showing framework requirements
- RBAC design recommendations and implementation guidance
- Security testing strategies and monitoring recommendations
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.
- 2d ago First seen · 30 lines · 52 tokens per session scan A 0bc83f455f53
mcp-security-auditor is an agent published in the GitHub repository davepoon/buildwithclaude (3,419 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 309 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 2026-09-03.
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