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Perplexity literally has an official MCP server on their docs site right now. One-click install for Cursor, VS Code, Claude Desktop. Today, at their own developer conference, their CTO says they’re moving away from MCP internally. This tells you everything about where the protocol actually stands. The company that built MCP integrations, shipped them to developers, and promoted them to the community ran into the same wall everyone else has: MCP’s spec hasn’t been updated since November 2025, the security model is basically nonexistent, and stdio transport breaks in any real production environment. APIs and CLIs won this round because they already solved the problems MCP is still trying to define. Auth, versioning, rate limiting, monitoring, all battle-tested for decades. Every enterprise procurement team on earth can evaluate a REST API. Nobody’s compliance department is signing off on a protocol where a Knostic scan found zero authentication across nearly 2,000 servers. Perplexity is targeting $656 million ARR by end of 2026. Their APIs are already in hundreds of millions of Samsung devices and six of the Mag 7. That revenue doesn’t flow through experimental protocols. It flows through endpoints that Fortune 500 IT departments can audit. One of MCP’s most prominent adopters just told a room full of developers to use the tools that shipped 30 years ago. That’s the most honest assessment of the protocol’s production readiness anyone has given.