MCP Server Tester is an open-source, browser-based tool for inspecting remote MCP servers before you wire them into an agent.
Paste a URL to list tools, resources, and prompts, plus:
- LLM Readiness Score (A–F) for tool-schema quality
- Tool-poisoning & rug-pull detection (heuristic)
- Per-request token cost estimates
- OAuth / auth inspector
- Compare mode for two servers
- Exportable Markdown / JSON reports with secret redaction
Runs locally or as a hosted demo. MIT-licensed, no signup.
