Borrowing it
Nothing to install: this file belongs to modelcontextprotocol/inspector. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/modelcontextprotocol/inspector/main/.claude/skills/test-servers/SKILL.mdgit clone --depth 1 https://github.com/modelcontextprotocol/inspectorWrote 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/modelcontextprotocol/inspector/test-servers)<a href="https://agentmods.dev/skills/modelcontextprotocol/inspector/test-servers"><img src="https://agentmods.dev/badge/skills/modelcontextprotocol/inspector/test-servers/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/modelcontextprotocol/inspector/test-servers"><img src="https://agentmods.dev/badge/skills/modelcontextprotocol/inspector/test-servers.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00097 | $0.03540 |
| Opus 5.5 | $0.00039 | $0.01416 |
| Sonnet 5.5 | $0.00019 | $0.00708 |
| Haiku 4.5 | $0.00010 | $0.00354 |
Grade C, and why
test-servers scanned grade C with 1 finding 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 10d 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf test-servers/build The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
1 file 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.
- 10d ago Changed 756424f813ab
- 17d ago Changed · +9 lines 0062a1a45b18
- 24d ago Changed · +11 lines be2737efa012
- 1mo ago Changed · +164 lines 2145d871a8ab
- 1mo ago Changed · +1 lines ef1e8ab096e8
- 1mo ago First seen · 99 lines · 97 tokens per session scan C 4837fec93caf
test-servers is a skill published in the GitHub repository modelcontextprotocol/inspector (11,143 stars, last pushed today), with no licence file. It adds 97 tokens to every session and 3,540 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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