mcp-builder

1# MCP Builder Skill
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3This skill guides you in building MCP (Model Context Protocol) servers using the official `@modelcontextprotocol/sdk` package with TypeScript.
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5## When to Use This Skill
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7- User asks to "create an MCP server"
8- User wants to "expose an API to AI agents"
9- User needs "tools for Claude/LLM"
10- User mentions "Model Context Protocol"
11- User wants to build "AI agent integrations"
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13## MCP Core Concepts
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15### What is MCP?
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17Model Context Protocol (MCP) is an open standard that enables structured, secure interactions between Large Language Models (LLMs) and external systems. MCP acts as a bridge allowing AI agents to:
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19- Access external data sources safely
20- Execute tools and functions
21- Maintain consistent communication protocols
22- Integrate with APIs and databases
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24### Key Components
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26**Tools** - Interactive functions that perform actions or computations:
27- Execute operations and computations
28- Accept parameters from the LLM
29- Return structured responses
30- Can change system state (side effects allowed)
31- Examples: calculations, database operations, API calls, sending emails
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33**Resources** - Read-only data endpoints:
34- Passive data sources (no side effects)
35- Loaded into AI context for reasoning
36- URI-based identification
37- Examples: documentation, config files, status data, user profiles
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39**Prompts** - Reusable prompt templates:
40- Pre-defined conversation starters
41- Can accept arguments for customization
42- Return structured messages for the LLM
43…