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CrewAI errors / Install

click.exceptions.Abort: You are missing the 'mcp' package

platform: CrewAI / category: Install

Cause

MCPServerAdapter.__init__() calls click.confirm() interactively when the mcp package is absent, which aborts in non-TTY environments like FastAPI, Docker, and CI.

Fix

Install the package: pip install mcp crewai-tools[mcp]. In headless environments, ensure mcp is in your requirements file so MCPServerAdapter never reaches the prompt. Track the upstream fix (raise ImportError instead of prompting) in CrewAI issue #3163.

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