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 skills add pdugan20/claudelint --skill validate-mcpgit clone --depth 1 https://github.com/pdugan20/claudelintWrote 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/skills/pdugan20/claudelint/validate-mcp)<a href="https://agentmods.dev/skills/pdugan20/claudelint/validate-mcp"><img src="https://agentmods.dev/badge/skills/pdugan20/claudelint/validate-mcp/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.
<a href="https://agentmods.dev/skills/pdugan20/claudelint/validate-mcp"><img src="https://agentmods.dev/badge/skills/pdugan20/claudelint/validate-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00074 | $0.00303 |
| Opus 5 | $0.00037 | $0.00151 |
| Sonnet 5 | $0.00015 | $0.00061 |
| Haiku 4.5 | $0.00007 | $0.00030 |
Grade A, and why
validate-mcp 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 8d 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
Validate MCP Servers
Runs claudelint validate-mcp to validate .mcp.json configuration files.
Usage
claudelint validate-mcp $ARGUMENTS
Options
--path <path>- Custom path to .mcp.json--verbose- Show detailed output--warnings-as-errors- Treat warnings as errors
What Gets Validated
- JSON syntax
- Server name uniqueness and consistency
- Transport type (stdio, sse)
- Stdio transport (command validation)
- SSE transport (URL validation)
- Variable expansion patterns (${VAR}, ${VAR:-default})
- Environment variables
Examples
claudelint validate-mcp
claudelint validate-mcp --path /path/to/.mcp.json
See Also
- validate-all - Run all validators
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 46 lines · 74 tokens per session scan A f56b3d89e8b2
validate-mcp is a skill published in the GitHub repository pdugan20/claudelint (12 stars, last pushed yesterday), licensed MIT. It adds 74 tokens to every session and 303 once invoked, about $0.0004 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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