Developer Tools

sunpeak

FREE

A tool to build and test chat-based apps.

New(no reviews yet) 0 views Updated 9/9/2026

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Overview

A tool to build and test chat-based apps.

Key Features

20+ typed React hooks (useToolData, useAppState, useTheme, useDisplayMode) for cross-platform MCP App developmentMCP dev server with HMR in ChatGPT and automatic rebuild notifications in ClaudeWrite your app once and deploy across ChatGPT, Claude, and future MCP-compatible hostsPre-built MCP App UI components that follow ChatGPT and Claude design guidelinesTest MCP Apps, ChatGPT Apps & Claude Connectors in CI/CDPlaywright E2E tests against the inspector with fixtures for iframe traversal and host switchingVisual regression testing with screenshot comparison across hosts and themesLive host tests against real ChatGPT and multi-model evals for response qualityRuns in GitHub Actions and any CI/CD pipeline with no paid accounts or API creditsInspect MCP Apps, ChatGPT Apps & Claude Connectors Locally