Securing ChatGPT's Remote MCP with Google OAuth: A Practical Guide to Custom Tool Integration
product#agent📝 Blog|Analyzed: Apr 28, 2026 04:45•
Published: Apr 28, 2026 04:40
•1 min read
•Qiita ChatGPTAnalysis
This article provides a brilliantly practical guide to extending ChatGPT's capabilities using the new Remote Model Context Protocol (MCP) feature. By integrating Google OAuth and deploying on Cloud Run, the author demonstrates an exciting, production-ready method for securely connecting external services as custom tools. It represents a fantastic leap forward in building personalized, secure AI agent ecosystems that interact safely with private APIs.
Key Takeaways
- •ChatGPT now supports remote MCP servers, enabling Pro, Plus, and Business users to connect to external internet services.
- •Authentication is crucial for remote endpoints to prevent unauthorized users from exploiting the custom tools.
- •The author successfully built a two-stage authentication flow using Express, Google OAuth, and Cloud Run to verify user identity.
Reference / Citation
View Original"ChatGPT の Developer Mode がリモート MCP サーバーへの接続に対応して、外部のサービスをツールとして呼び出せるようになりました。"
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