The Protocol Paradox: Why GitHub MCP Fails to Integrate with Copilot Studio
In the rapidly evolving landscape of the Model Context Protocol (MCP), it is easy to assume that if two platforms claim support for the same protocol, they should just work together. In practice, many developers are discovering otherwise when attempting to connect Microsoft Copilot Studio directly to GitHub’s hosted MCP endpoint. This particularly affects architects attempting to reuse GitHub‑hosted MCP tooling from Copilot Studio custom actions. Despite supplying a valid Personal Access Token (PAT) and correct headers, the integration fails with a deceptively simple error: Content-Type must be 'application/json' ...