A normal SaaS app with OAuth behind it
A tiny garden SaaS your users can connect to ChatGPT.
PetalPal is a real signed-in product dashboard. Users create a garden, manage plants, and MCP Stack exposes the same protected API to ChatGPT without a shared API key.
OAuth sign-in
Private user data
MCP Stack Gateway
Signed-in workspace
My garden
This is the same protected API surface MCP Stack turns into ChatGPT tools.
Plants
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Connect the protected API to ChatGPT
MCP Stack fronts the same OAuth-protected API with a ChatGPT-ready MCP Gateway. No shared API key is needed; ChatGPT follows the OAuth challenge.
https://petalpal-api-mcp.mcp.mcpstack.com/mcp