sunpeak Blog

Insights, tutorials, and updates about MCP Apps and ChatGPT Apps.

Live Testing for Claude Connectors and ChatGPT Apps: Test Against Real Hosts with Playwright (June 2026)

Abe WheelerJune 7, 2026

Run automated Playwright tests against real ChatGPT and Claude sessions to validate your Claude Connector or MCP App end-to-end. Learn what live tests catch, when to run them, how to keep them stable, and how sunpeak handles auth, host refresh, and iframe access.

Claude ConnectorsClaude Connector TestingMCP AppsMCP App TestingChatGPT AppsChatGPT App TestingPlaywrightLive Testing

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Debugging Claude Connectors: Fix Common Errors in Development and Production (May 2026)

Abe WheelerMay 24, 2026

Your Claude Connector is not working. Here is how to diagnose and fix connection failures, OAuth discovery errors, tools not being called, MCP App UI rendering bugs, output limits, and timeouts.

Claude ConnectorsClaude Connector TestingClaude Connector FrameworkClaude AppsMCP AppsMCP App FrameworkMCP App TestingChatGPT Apps

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Claude Connector Authentication: How OAuth Works and When You Need It (May 2026)

Abe WheelerMay 12, 2026

A developer guide to OAuth authentication for Claude Connectors. Learn when auth is required, how the OAuth 2.1 flow works with Claude, how to configure callback URLs and discovery documents, and what the Connectors Directory submission requires.

Claude ConnectorsClaude AppsMCP AppsClaude Connector FrameworkMCP App Framework

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What Are Claude Connectors? Data Access, Auth, Custom Setup, and Troubleshooting (May 2026)

Abe WheelerMay 11, 2026

Claude Connectors give Claude access to external data through MCP. Learn what data Claude can access through 375+ connectors, how authentication works, how to add custom connectors, and how to troubleshoot common issues.

Claude ConnectorsClaude AppsMCP AppsClaude Connector FrameworkMCP App Framework

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The Fastest Way to Prototype ChatGPT & MCP Apps

Hanh NguyenMay 7, 2026

A guest post by our friends at Fractal on how to validate ChatGPT App ideas with users before committing engineering time, and how to keep testing the app as it grows.

ChatGPT AppsMCP AppsPrototypingGuest Post

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Claude Connectors Tutorial: Build and Deploy a Connector to Claude (May 2026)

Abe WheelerMay 5, 2026

Build an interactive Claude Connector from scratch. Learn the architecture, create tools and UI resources, test locally with the multi-host inspector, connect to a real Claude session with ngrok, and submit to the Connectors Directory.

Claude ConnectorsClaude AppsMCP AppsMCP App FrameworkChatGPT AppsChatGPT App FrameworkClaude Connector FrameworkClaude Connector Testing

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Claude Inspector for MCP Apps: Test Claude Connectors Locally with sunpeak (April 2026)

Abe WheelerApril 30, 2026

Test Claude Connectors and MCP Apps locally with the sunpeak Inspector. Switch between Claude, ChatGPT, and other host runtimes from a single dev server, run automated tests across hosts, and ship cross-platform apps from one codebase.

Claude AppsClaude ConnectorsClaude Connector TestingClaude Connector FrameworkMCP AppsMCP App FrameworkMCP App TestingChatGPT AppsChatGPT App FrameworkChatGPT App Testing