[KongchangAI]
Unverified50% confidenceFactExact time

MCP 2.0 officially supports an extensions mechanism, divided into three categories — official extensions, experimental extensions, and vendor-specific extensions — with official extensions carrying the io.modelcontextprotocol prefix.

1
Sources
50%
Confidence
Long-term
Relevance
9/16/2026
First Seen

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https://kongchang.com/claim/925515
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curl https://kongchang.com/api/v1/knowledge/claims/925515
MCP
get_claim(id=925515)