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The Open Source Protocol Of 2024

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Anthropic's Model Context Protocol supports two transport kinds for MCP servers. One of them — used for local subprocess-based servers — reads JSON-RPC frames from standard input and writes responses to standard output. Name this transport (one word, all lowercase, as it appears in the spec). Flag format: CONGRESS{transport}. Example: CONGRESS{unix}.
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An abbreviation older than the internet, used in C's stdlib.

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