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Luu, T.J.

Adding a custom MCP server to Claude and ChatGPT

infonewsLLM-Specific

industry

Source: Simon Willison's WeblogJuly 28, 2026

Summary

This article discusses how to connect a custom MCP server (model context protocol, a system that lets AI assistants access external tools and data sources) to Claude and ChatGPT's web interfaces. The author notes that while both chat applications support MCP servers, the setup process is not straightforward and requires multiple steps.

Classification

Attack SophisticationModerate

AI Component TargetedAPI

Affected Vendors

OpenAIAnthropic

Related Issues

info

Secure AI agent access patterns to AWS resources using Model Context Protocol

Same vendorAWS Security Blog

high

Anthropic accuses Chinese AI labs of mining Claude as US debates AI chip exports

Same vendorTechCrunch

Monthly digest — independent AI security research

Original source: https://simonwillison.net/2026/Jul/29/mcp-in-claude-and-chatgpt/#atom-everything

First tracked: July 29, 2026 at 08:01 PM

Classified by LLM (prompt v3) · confidence: 85%