Build MCP tools with clarity.
Insights, guides, and field notes from LegacyAI.
The LegacyAI blog covers OpenAPI-to-MCP workflows, Claude Desktop integrations, and the operational playbooks teams use to ship reliable AI agent tools.
Playbooks for MCP teams.
Curated guides for shipping production-ready tools.
Browse MCP articles by topic.
OpenAPI design patterns for safe, enterprise-ready MCP tools
Learn how to structure schemas, enforce read-only paths, and map auth scopes so Claude Desktop agents stay safe by default.
Claude Desktop + MCP: A production checklist
Ship reliable tools with logging, permission control, and rate limits tuned for AI agents.
Swagger to MCP in under an hour
A step-by-step walkthrough of the LegacyAI pipeline, from spec upload to synced tools.
Why read-only defaults matter for AI tools
Protect critical systems by designing MCP tools that prioritize safe reads and controlled writes.
From spec drift to synced MCP servers
Use dynamic sync to keep Claude Desktop tools aligned with every OpenAPI release.
Choosing the right auth strategy for MCP
JWT, OAuth, and API keys-how to align your MCP tools with enterprise identity systems.
LegacyAI changelog: Q2 platform updates
New validation policies, Claude Desktop quickstart flows, and improved monitoring.
AI agent observability with MCP telemetry
Capture tool usage, latency, and error metrics without disrupting your API stack.
Building MCP tool catalogs for teams
Organize tools by business domain so every team ships with clarity and control.
What is MCP? Model Context Protocol Explained
A plain-language guide to MCP, how it works, and why it is the backbone of Claude tool calling.
MCP vs Traditional REST APIs - What's the Difference?
Compare MCP and REST APIs, learn when to use each, and see how they complement each other.
How to Connect FastAPI to Claude Desktop in 5 Minutes
A step-by-step guide to generate MCP tools from FastAPI and register them in Claude Desktop.
ASP.NET Core MCP Server - Complete Setup Guide
Configure Swashbuckle, export OpenAPI, and generate MCP servers for Claude Desktop.
How to Generate MCP Server from Swagger JSON
Use Swagger JSON to generate MCP tools, then verify and ship them safely.
OpenAPI vs Swagger - What's the Difference for AI?
Understand the naming history, spec versions, and what matters most for MCP tool generation.
Legacy System AI Modernization Without Replacement
Use MCP as a bridge to modernize legacy systems without rewriting core infrastructure.
Top 10 Enterprise Use Cases for Claude AI with Internal APIs
Ten proven ways enterprise teams connect Claude to internal APIs in 2026.
Build MCP Server with Node.js - Step by Step
A full tutorial for building MCP servers in Node.js with a clean tool structure.
MCP Architecture Explained for Developers
A detailed breakdown of MCP components and how Claude calls tools end-to-end.
How AI Agents Use Tool Calling - MCP Explained
Understand tool calling flows and the specific role MCP plays for AI agents.
MCP with Next.js - Integration Guide
Generate OpenAPI from Next.js, connect to LegacyAI, and configure Claude Desktop.
Choosing Auth Strategy for MCP - JWT vs API Key vs OAuth
Compare auth strategies, learn when to use each, and see how LegacyAI detects them.
What is Claude Desktop? Developer Guide
A developer-first overview of Claude Desktop and how MCP servers integrate with it.
MCP Server Security Best Practices
Protect tools with read-only mode, scoped auth, and strong environment isolation.