sunpeak
https://sunpeak.ai/A tool to build and test chat-based apps.
sunpeak is an open-source framework for building, testing, and shipping ChatGPT Apps and MCP Apps that run inside AI chat clients like ChatGPT and Claude; it provides a local Apps SDK runtime simulator, typed React hooks, pre-built UI components, an MCP dev server with hot reload, CLI tooling, and Vitest/Playwright integration so you can develop and run deterministic, automated tests for LLM-driven interactive UIs and tool invocations without a paid ChatGPT account.
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- Official site — sunpeak.ai
- Category, pricing, and popularity (upvotes) aggregated by GLSRM from public AI-tool directories; listing last updated February 14, 2026.
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