
The large file stays on the server: Matryoshka returns a short handle
Matryoshka keeps a document on the server and answers with short handles. A hand-run check on War and Peace and a 10k-line log, with no model key.
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Matryoshka keeps a document on the server and answers with short handles. A hand-run check on War and Peace and a 10k-line log, with no model key.

Model Context Protocol—a shared tool catalog for AI apps: server, client, JSON-RPC, and a PayIQ FastMCP walkthrough.

A practical guide to Model Context Protocol after the 2026-07-28 release: no sessions, MRTR, header-based routing, auth hardening, shadow MCP, and servers that survive real load.