About Emmanuel
I’m Emmanuel, 3x VP Product, now a founder at Level 250.
If you built or used 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

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 & Ship Agent Skills for Your Product
Skills as a Product for Agents. Ship to a New AI Distribution Channel in 4 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

Good CLI Design is Agent UX

Agent Skills and Why Your Product Needs Them

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

The AI-Ready API Checklist
Download a 2-page checklist with the 12+2 things you need to build AI-ready products.
Get the AI-Ready API Checklist

API Design Skills
Teach your agent how to design standards-based APIs and then run quality checks on them.
Get all 3 free skills

The API Developer Experience Canvas
Rate and map the essential tools your developer portal needs at each 4 stages of the API Developer Experience.
Get the canvas
API Lifecycle & Governance Checklist
Get the free resource
