by modelcontextprotocol · MCP Server · ★ 11.2k
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npx @modelcontextprotocol/inspector # web UI (default)
npx @modelcontextprotocol/inspector --cli # CLITaken from the project's README on GitHub. Check the security audit before running it.
None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →
The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.
| Stars | 11,248 |
| Forks | 1,558 |
| Language | TypeScript |
| Category | MCP Server |
| Quality Score | 65/100 |
| Open Issues | 15 |
| Last Updated | 2026-11-05 |
| Created | 2024-10-03 |
| Platforms | browser, cli, mcp, node |
| Est. Tokens | ~23k |
MCP Inspector A developer tool for inspecting Model Context Protocol (MCP) servers. It ships as a single package, , that provides three ways to inspect a server: Web — a Vite + React + Mantine single-page app with a Node backend. CLI — a scriptable command-line client for automation, CI, and fast agent feedback loops. TUI — an interactive terminal UI built with Ink.
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Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.
The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.
Sources & who's responsible: