[docs] How to run FastMCP with args or env vars?

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
68/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Quiet
Tech stack
python
Domain
cli, documentation

Research direction

Start with the README's Development Mode section and the existing mcp dev and mcp install examples. Check how the development command accepts server arguments and environment variables, then document the supported invocation or explain the limitation and appropriate alternative. Done means a newcomer can run a development server with the needed configuration from the updated instructions.

Written by the indexing model from the issue text.

Description

documentation P2 ready for work

https://github.com/modelcontextprotocol/python-sdk/tree/main?tab=readme-ov-file#development-mode

# Development Mode
The fastest way to test and debug your server is with the MCP Inspector:

mcp dev server.py

# Add dependencies
mcp dev server.py --with pandas --with numpy

# Mount local code
mcp dev server.py --with-editable .

This didn't show how to run with args in dev mode.
Expected to see something like this:

mcp install server.py -v API_KEY=abc123 -v DB_URL=postgres://...
mcp install server.py -f .env

However this is not dev mode

Dominant language
Python
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Merged PRs (30d)
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