python-mcp-server-generator

A guide for creating a Python MCP server, which lets an AI agent use defined tools and resources. It covers project setup, configuration, error handling, and validation.

In plain words
What is it for?
Use it to create a server with Python and uv, choose local or remote transport, add typed tools, and configure direct execution.
Why use it?
It provides a consistent starting structure so a new server is configured correctly and its tools are described clearly.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/secondlifes/code-intel/python-mcp-server-generator
Any agent
npx skills add SecondLifes/code-intel --skill python-mcp-server-generator
Clone the repo
git clone --depth 1 https://github.com/SecondLifes/code-intel

Made for: Claude Code, Codex.

Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,176 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00022 $0.01176
Opus 5 $0.00011 $0.00588
Sonnet 5 $0.00004 $0.00235
Haiku 4.5 $0.00002 $0.00118

Measured yesterday against content hash b84b315860d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

python-mcp-server-generator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

89% identical to python-mcp-server-generator — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/python-mcp-server-generator/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generate Python MCP Server

Create a complete Model Context Protocol (MCP) server in Python with the following specifications:

Requirements

  1. Project Structure: Create a new Python project with proper structure using uv
  2. Dependencies: Include mcp[cli] package with uv
  3. Transport Type: Choose between stdio (for local) or streamable-http (for remote)
  4. Tools: Create at least one useful tool with proper type hints
  5. Error Handling: Include comprehensive error handling and validation

Implementation Details

Project Setup

  • Initialize with uv init project-name
  • Add MCP SDK: uv add "mcp[cli]"
  • Create main server file (e.g., server.py)
  • Add .gitignore for Python projects
  • Configure for direct execution with if __name__ == "__main__"

Server Configuration

  • Use FastMCP class from mcp.server.fastmcp
  • Set server name and optional instructions
  • Choose transport: stdio (default) or streamable-http
  • For HTTP: optionally configure host, port, and stateless mode

Tool Implementation

  • Use @mcp.tool() decorator on functions
  • Always include type hints - they generate schemas automatically
  • Write clear docstrings - they become tool descriptions
  • Use Pydantic models or TypedDicts for structured outputs
  • Support async operations for I/O-bound tasks
  • Include proper error handling

Resource/Prompt Setup (Optional)

  • Add resources with @mcp.resource() decorator
  • Use URI templates for dynamic resources: "resource://{param}"
  • Add prompts with @mcp.prompt() decorator
  • Return strings or Message lists from prompts

Code Quality

  • Use type hints for all function parameters and returns
  • Write docstrings for tools, resources, and prompts
  • Follow PEP 8 style guidelines
  • Use async/await for asynchronous operations
  • Implement context managers for resource cleanup
  • Add inline comments for complex logic

Example Tool Types to Consider

  • Data processing and transformation
  • File system operations (read, analyze, search)
  • External API integrations
  • Database queries
  • Text analysis or generation (with sampling)
  • System information retrieval
  • Math or scientific calculations

Read the full file on GitHub · 114 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 114 lines · 22 tokens per session scan A b84b315860d7

Subscribe to this mod's changes

python-mcp-server-generator is a skill published in the GitHub repository SecondLifes/code-intel (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 22 tokens to every session and 1,176 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to python-mcp-server-generator, differing in 8 lines, and is treated as a copy.

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