curl -fsSL https://api.cheatcodehq.com/install.sh | sh -s -- fastmcp --to allCopies 1 skill into each app's skills folder (Claude Code: ~/.claude/skills), after checking every file against PrefectHQ/fastmcp at commit 89b00b7. Nothing else on your computer changes. To undo it, run the terminal command with --uninstall at the end; that also removes what the app added.
Then start a new session in your AI app and ask for the work in plain words; it picks the skill from its description. In Claude Code you can also type /fastmcp:fastmcp-client-cli.
See it in use
After installing, start a new session and say: Use the fastmcp-client-cli skill to list the tools in server.py, call each one with sample arguments, and tell me if any does something other than what it says.
What else it can do, and its limits
- 1 skill: the fastmcp list and fastmcp call commands from the FastMCP project
- Lists a server's tools, with their input and output schemas, resources and prompts when asked
- Calls any tool with key=value or JSON arguments and shows the result, as text or JSON
- Reaches servers as a Python file, a web address, a stdio command such as npx, or a config file
- Needs a terminal and Python with fastmcp installed (the recording used uv and fastmcp 4.1.3)
- Calls tools for real, so a tool that writes or sends something will do it: test with sample data
Sample input Recorded Oct 24, 2026 in Claude Code 2.1.308 with Sonnet 5.5. The video replays that session; nothing in it was acted or edited.
What's inside 1 skill
fastmcp-client-cliQuery and invoke tools on MCP servers using fastmcp list and fastmcp call. Use when you need to discover what tools a server offers, call tools, or integrate MCP servers into workflows.
Query and invoke tools on MCP servers using fastmcp list and fastmcp call. Use when you need to discover what tools a server offers, call tools, or integrate MCP servers into workflows.
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