ChatGPT App Starter Kit (MCP + Vercel)

Build and ship a ChatGPT App in ~15 minutes — without fighting MCP, SSE, CORS, or deployment issues.

This starter kit gives you a clean, production-ready template for building ChatGPT Apps using an MCP server (Streamable HTTP + SSE) deployed on Vercel.

If you’ve struggled with:

• MCP protocol wiring

• text/event-stream (SSE) errors

• 405 / 406 issues

• CORS preflight failures

• “Method Not Allowed” or session errors

…this kit skips all of that.

WHAT YOU GET (FREE REPO):

• Fully working MCP server (Streamable HTTP + SSE)

• Correct POST / and GET / handling

• OPTIONS / with CORS headers

• /health endpoint

• One deterministic example tool

• One UI resource example

• Review-safe, auditable structure

• MIT licensed

WHAT YOU GET IN PRO (PAID):

• Stripe / LemonSqueezy-ready version

• License notes for commercial use

• Extra example tools (PDF, CSV, text)

• App submission checklist

• Proven folder structure

• Ongoing updates as MCP evolves

WHO THIS IS FOR:

• Developers building ChatGPT Apps

• Indie hackers and SaaS founders

• Anyone who wants a working base instead of reading docs for days

This is not a course.

This is not theory.

It’s a working starter you can deploy today.