Expired65% confidenceFactExact time
SSE (Server-Sent Events) was the primary remote communication method in early versions of MCP.
3
Sources
65%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
MCP Protocol Explained: The Unified Standard for AI Agent-Tool Communication
bilibili大模型小阳6/8/2026
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