About Emmanuel
I’m Emmanuel, 3x VP Product, now a founder at Level 250.
If you built APIs in the past 15 years, chances are you’ve used one of my products:
I’ve led some of the most influential API tools: Apiary (550,000+ APIs), Swagger (750,000+ APIs) and Oracle’s first Cloud-Native API Gateway. Before that, I built large B2B API programs at Verisk, Moody’s, and Precisely.
Today, I advise Fortune 500 CEOs and AI-forward startup founders on API Strategy, Developer Experience, MCP products, and AI agent readiness.
I'm also a member of OpenAPI and a featured speaker at apidays and other global technology conferences.
My passion is helping others build products, which is why I also teach on Maven: to share my lessons learned and help Product Managers and Engineers fast-track their careers.

Courses
Multi-day, guided programs to get real results

API Product Mastery for Experienced PMs
Become an expert API Product Manager and learn how to scale and manage an API portfolio.

API Fundamentals for Product Managers
Become an API Product Manager. Go from generalist to specialist and ship winning API products.

Build AI-Ready API Products With MCP
Everything you need to make your product work for agents. Designed, built, evaluated, and shipped in 3 days.
Workshops
Single-day, hands-on sprints to practice new skills

What Agents Want from Your Product
Your product was designed for humans. Your next million users won't be human.

Build a ChatGPT App with AI
Publish an App to OpenAI's Appstore, for 900 million users.

Build an MCP Product with AI
Your product needs an MCP server for agents to use it. Build it in 3 hours.

Build an API-First Product with AI
Go from an idea to a deployed, standards-compliant API in one session.
Lightning Lessons
Free, interactive sessions to explore new topics

Agent Skills and Why Your Product Needs Them

Good CLI Design is Agent UX

Build for ChatGPT's New App Store

Why Your Product Needs MCP

The Easiest Way to Prototype an API

Why Agents Can't Use Your Product
Resources
Tools and downloads

