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Claude Code 2.1.292 defaults to new protocol, causing startup delays

By PulseAugur Editorial · [1 sources] ·

Claude Code version 2.1.292, released on October 6, now defaults to negotiating protocol version 2026-07-28 for its MCP servers. This change, intended as a minor update, has caused a noticeable startup delay for users running multiple local MCP servers, as these servers do not yet support the new protocol. While most servers gracefully negotiate down to an older version, some may reject the new protocol outright, requiring the use of an environment variable to revert to legacy settings. AI

IMPACT This update to Claude Code's protocol negotiation may cause minor startup delays for users running multiple local MCP servers, requiring configuration adjustments for older systems.

RANK_REASON The item discusses a software update to a specific tool (Claude Code) and its impact on users, rather than a new model release or significant research.

Read on dev.to — MCP tag →

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

Claude Code 2.1.292 defaults to new protocol, causing startup delays

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19 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
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Tool
The item discusses a software update to a specific tool (Claude Code) and its impact on users, rather than a new model release or significant research.
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, infra
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High
Clearly on-topic for AI-industry coverage.
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Breaking (< 6h)
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Full methodology in our editorial standards.

COVERAGE [1]

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

    Claude Code 2.1.292 Asks Your MCP Servers for 2026-07-28: I Probed the Official Servers, All Four Answered 2025-11-25

    <p>Claude Code v2.1.292 shipped October 6 with a one-line change that touches every local MCP server you run: stdio connections now negotiate protocol version 2026-07-28 by default, on every install, including Bedrock, Vertex and Foundry setups. The escape hatch is a single envir…

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