2026 Detailed Cross-Evaluation of MCP Auth Support Across Major AI Agents
New-Combination2241 · reddit · 2026-07-06
Based on documentation verified in early July 2026, the author mapped out MCP authentication support across eight major AI platforms: Claude API, Claude.ai desktop, OpenAI Responses API, ChatGPT, Gemini, VS Code/Copilot, Cursor, and Perplexity. Almost all platforms support the latest spec (2025-11-25), but authentication flows vary significantly. Claude.ai desktop and ChatGPT support full OAuth; OpenAI Responses API and Claude API require passing a Bearer Token; VS Code supports the full flow including DCR; Cursor supports DCR but lacks CIMD. These divergent interpretations make cross-platform interoperability a major ongoing challenge.
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