If you’re interacting with MCP servers, you might want to test them without having to use an AI agent/client to connect and interact with it (looking at you HTB mcp_only CTF events…). Thankfully there’s tools available.

modelcontextprotocol/inspector

The MCP inspector is a developer tool for testing and debugging MCP servers. Hackthebox has competitions which are only available via MCP which means you need an AI agent/client or a way to inspect the MCP server.

With inspector, you can query the tools and providing arguments as necessary.

Here’s an example using MCP inspector with Hackthebox MCP to retrieve events, challenges, etc: