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Cloudflare AI Security · August 14, 2026

How Cloudflare detects MCP traffic and helps secure it

analysis Agent SecurityAI EngineeringAI Compliance
Why it matters

Cloudflare Gateway now classifies inspected Streamable HTTP MCP traffic using the MCP-Protocol-Version header, exposes the user and destination in logs and a dashboard, and supports allow or block rules through an MCP-specific selector. The article distinguishes unapproved shadow MCP from direct connections that bypass an approved Portal's controls, and notes blind spots including local stdio, off-network, non-inspected, and otherwise unobserved traffic.

My takeaway: Use network detection to build an MCP inventory, not as proof that a connection is safe. Route approved servers through a controlled portal, make upstream origins reject direct access, apply least-privilege identity and tool policies, and retain tool-level audit data. Explicitly test the stdio, off-network, and TLS-inspection gaps that a gateway cannot see.
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OWASP GenAI Security Project · guide

OWASP Top 10 for Agentic Applications for 2026

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