sunpeak

Open-source framework for building MCP apps inside AI chat hosts

Open Source Coding & Development

What is sunpeak?

sunpeak is an open-source framework for building interactive MCP Apps with UIs that run inside ChatGPT, Claude, and other AI chat hosts. It provides React hooks, a CLI, a local inspector with hot reload, and a structured project convention so developers write app logic once and deploy across hosts. It also includes simulation and live testing tools plus an eval framework to verify MCP tools work reliably across models.

Key features

  • React framework for MCP Apps
  • Local inspector with hot reload
  • Simulation and live host testing
  • Multi-model eval framework

Pros

  • Write once, run in ChatGPT and Claude
  • Local testing without paid host accounts
  • Actively maintained

Cons

  • Newer framework, ecosystem still growing

sunpeak at a glance

PricingOpen Source
CategoryCoding & Development
Platformsweb, linux, macos, windows
Official websitesunpeak.ai
mcpopen sourcechatgpt appsdeveloper framework

How to choose the right Coding & Development tool

The right coding tool depends on where you write code and how much of your codebase it can understand. IDE integration is the first filter — a tool that lives in your editor, sees your project files and respects your stack will help far more than a general chatbot you paste snippets into. Look for accurate completions, clear explanations of suggested changes, and strong refactoring and debugging support for your main languages. Privacy deserves real attention: check whether your code is used for training, and whether a self-hosted or enterprise option exists for sensitive projects. Price against the hours it actually saves — most developers feel the difference within the first week of real use.

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sunpeak FAQs

What is sunpeak?

sunpeak is an open-source framework for building interactive MCP Apps with UIs that run inside ChatGPT, Claude, and other AI chat hosts. It provides React hooks, a CLI, a local inspector with hot reload, and a structured project convention so developers write app logic once and deploy across hosts. It also includes simulation and live testing tools plus an eval framework to verify MCP tools work reliably across models.

What are the main features of sunpeak?

sunpeak offers React framework for MCP Apps, Local inspector with hot reload, Simulation and live host testing and Multi-model eval framework.

How much does sunpeak cost?

sunpeak is open source, so the software itself is free to download, use and self-host. Your only costs are the infrastructure you run it on and any paid services you connect to it.

What are the pros and cons of sunpeak?

Strengths of sunpeak include Write once, run in ChatGPT and Claude; Local testing without paid host accounts; Actively maintained. On the downside, Newer framework, ecosystem still growing.