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Documentation Index

Fetch the complete documentation index at: https://sunpeak.ai/docs/llms.txt

Use this file to discover all available pages before exploring further.

Test an existing MCP server

Add automated testing to any MCP server (Python, Go, TypeScript, Rust, or any language). No project changes required.

Build a new MCP App

Create a new MCP App project with interactive UIs, tools, and testing built in. Follow the steps below.

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New projects

1

Create a project

Requirements: Node.js 20+
npx sunpeak new sunpeak-app
cd sunpeak-app
2

Develop locally

Start the development server:
pnpm dev
This starts:
  • The MCP App inspector at http://localhost:3000 for local development
  • An MCP server at http://localhost:8000 for testing with real hosts like ChatGPT
Both servers support Hot Module Reload - your changes reflect instantly!
3

Test in a host (ChatGPT)

Run a tunnel to allow ChatGPT to connect to your local MCP server:
# In another terminal, run a tunnel. For example:
ngrok http 8000
You can then connect to the tunnel Forwarding URL at the /mcp path (e.g. https://your-random-subdomain.ngrok-free.dev/mcp) from ChatGPT in developer mode: User > Settings > Apps & Connectors > Create.
4

Build & start for production

Build your resources and tools, then start the production MCP server:
pnpm build && pnpm start
This compiles your tool handlers, Zod schemas, and optional auth from src/server.ts, then starts a production MCP server on port 8000.

Project Scaffold

Explore your new MCP App project.

Deployment Guide

Deploy your app to production.