Who it is for
Mid career product and technical staff looking for short sessions on APIs, MCP, or product management.
Overview
What API Lessons does
API Lessons is an index of short, free Lightning Lessons hosted on the Maven platform. Subjects covered are APIs, MCP, product management, careers in technical product management, and ChatGPT apps.
For any listed lesson there are three paths: watch a past recording, register for an upcoming live session, or find the longer cohort based course that goes deeper into the same subject. Sessions run over Zoom, are practical in focus, and are held in English only.
The lessons are taught by Emmanuel Paraskakis, an entrepreneur and product management consultant at Level 250 with more than fifteen years of work shaping products. The stated audience is mid career professionals in software and technology.
What stands out
It connects each short lesson to the longer course that covers the same ground.
Availability
Where API Lessons is listed
API Lessons is listed in the ChatGPT apps directory only. Level 250 Inc. has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
In the ChatGPT apps directory
- Developer
- Level 250 Inc.
- Filed under
- Education & Research
- Listed since
- June 2026
- Authentication
- Authenticates when installed
- Website
- level250.com
- Policies published
- Privacy policy · Terms of service
- Official listing
- Open in ChatGPT
- Snapshot
- August 2026
Example prompts from the listing
- I want API Lessons for Product Managers
- All Maven API Lessons
- I want to learn about APIs
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This is an independent catalogue entry compiled by Node8 from API Lessons's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Level 250 Inc., and inclusion here is not an endorsement.
Want your company reachable inside ChatGPT and Claude?
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.