MCP Ecosystem Crosses 500+ Servers and 97M Monthly SDK Downloads — OAuth 2.1 Added to Spec, SSE Transport Deprecated in Favor of Streamable HTTP

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The Model Context Protocol ecosystem reached a milestone in April 2026: 500+ servers, 97 million monthly SDK downloads, official client support across every major editor, and an enterprise security story passing audit. The spec added OAuth 2.1 authorization with incremental scope consent. SSE transport is now deprecated; the standard is stdio for local tools and Streamable HTTP for remote/hosted servers.