File extension updated
Sep 11, 21
Claude Desktop Extensions now use the . mcpb (MCP Bundle) file extension in place of .dxt. Existing . DX T extensions will continue to function, but we recommend that developers switch to using . MCPB for all new extensions moving forward. The core functionality is unchanged—this is simply an update to the naming conventions. When we launched the Model Context Protocol (MCP) last year, developers quickly created powerful local servers that allowed Claude to connect to a wide range of resources, from file systems to databases. We continued to receive the same feedback: the installation process was overly complex.
Anthropic Engineering