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Model Context Protocol Explained: Actors, Lifecycle, Transport

This story is from 2026-09-28. It is preserved in the archive; the latest stories are on the live feed.

Short answer: The Model Context Protocol is a JSON-RPC contract between three actors: a host application, the client it runs, and the server that exposes tools. A session is negotiated with initialize , capabilities are declared once, and calls flow over one of two transports — stdio or Streamable…

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  1. 2026-09-28 01:50 · DEV Community — AI
    Model Context Protocol Explained: Actors, Lifecycle, Transport

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