10 posts
yeonghyeon · Apr 29, 2026How we built and submitted 3Min API as a ChatGPT App. We picked the standard MCP SDK only (no OpenAI-specific wrapper), implemented OAuth 2.1 (RFC 7591/8414/9728) plus an API Key path for CLI tools, and learned to mark destructiveHint/openWorldHint conservatively after one rejection. The same code covers Claude Connectors as well.
yeonghyeon · Apr 15, 2026A beginner's guide to JSON that closes out the wine shop owner's story. Starting from a spreadsheet, we follow the recursive structure of keys, values, objects, and arrays — ending with a today-you-can-do-it practice where you write one of your own business events as JSON, no prior knowledge required.
yeonghyeon · Apr 14, 2026A non-developer's guide to APIs told through the wine shop owner's story — why an API is a 'safe gateway', why building one is hard, and what you can try today without any prior knowledge.
yeonghyeon · Apr 13, 2026From paper ledgers to spreadsheets to databases — a relational database primer for non-developers, told through the growth story of a small wine shop.
yeonghyeon · Apr 12, 2026What AI does well, what it doesn't, and the two things every small business must prepare — a practical guide to data and APIs.
Chae-won · Mar 20, 2026Email + spreadsheets, outsourced development, or API relay — compare three ways to receive external data without a dev team.
Chae-won · Mar 14, 2026A step-by-step tutorial: create an API endpoint in minutes — no coding, no server, no backend required.
Chae-won · Mar 13, 2026What API keys are, why they matter, and five practical principles to manage them securely.
Chae-won · Mar 11, 2026Webhooks explained simply using a package delivery analogy. Plus a troubleshooting checklist for when webhooks stop working.
Chae-won · Mar 1, 2026Why we chose JSON as the backbone of 3Min API, what that means for your data, and how to turn API records into real business insights.