What are the three MCP primitives?

Tools (actions with side effects), resources (read-only data), and prompts (reusable templates).

How do I test an MCP server?

Use the official MCP Inspector: npx @modelcontextprotocol/inspector python server.py

ModelRefs / Build a Custom MCP Server in Python

Build a Custom MCP Server in Python

Build a custom MCP server in Python with FastMCP: expose typed tools, resources, and prompts, test with the Inspector, and connect it to Claude.

What this reference supports

Build a Custom MCP Server in Python: This tutorial provides a structured implementation path with prerequisites, steps, checkpoints, and related references. Read the complete sequence before applying commands or configuration in production.

Build a Custom MCP Server in Python: Adapt examples to the versions, security boundaries, data policy, and failure-handling requirements of your system. Validate intermediate outputs and keep a rollback path for changes that affect users or stored data.

Build a Custom MCP Server in Python: Tutorial examples demonstrate a technique; they do not prove reliability, compliance, performance, or suitability for a workload. Use current primary documentation and test the final system under representative conditions.

Continue your research

Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to Build a Custom MCP Server in Python.