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Model Context Protocol updates to stateless design, new requirements for servers

By PulseAugur Editorial · [1 sources] ·

The Model Context Protocol (MCP) has been updated to version 2026-07-28, introducing significant changes for server authors. The protocol is now stateless, removing the need for an initialize handshake and requiring protocol version and client capabilities to be included in the `_meta` field of every request. Servers must now implement the `server/discover` endpoint and include a `resultType` field in all results. Error codes have also been renumbered, with `UnsupportedProtocolVersionError` moving from -32004 to -32022. Additionally, caching hints like `ttlMs` and `cacheScope` are now required for certain results. AI

IMPACT Requires server authors to update implementations to comply with new stateless protocols and error handling.

RANK_REASON Update to a specific protocol specification detailing changes for developers.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Model Context Protocol updates to stateless design, new requirements for servers

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  1. dev.to — MCP tag TIER_1 English(EN) · Horus ·

    What changed in MCP 2026-07-28 for server authors: stateless requests and server/discover

    <p>The MCP spec version 2026-07-28 makes the protocol stateless. If you wrote a server for 2025-11-25, several things change. This post lists the changes a server author needs first. Each one links to the official spec page where we read it on 2026-10-14. We did not build a confo…

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