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MCP capability inspector

Paste an MCP initialize, discover or list response and get capabilities, a tools table with effective safety hints, and spec and injection findings without executing anything.

This inspector reads what a server declares about itself and reports it. It never speaks MCP, never opens Streamable HTTP or SSE, and never calls a tool, so nothing you paste here can run. The safety hints come from tool annotations, and servers are honest or not on their own: an annotation claims, this page repeats the claim. Heuristic findings are word and character pattern matches written to make you read a tool before you trust it, not verdicts about intent, and the spec checks cover the required-field and pagination rules a paste can show, not a full conformance suite.
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Canonical HTML: https://nutter.tools/ai/mcp-capability-inspector
Markdown version: https://nutter.tools/ai/mcp-capability-inspector.md
Plain-text version: https://nutter.tools/ai/mcp-capability-inspector.txt
Agent index: https://nutter.tools/llms.txt