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HomeDocsClaude Code CLI 8 Sep 2026
One change · claude-code

Connect Claude Code to tools via MCP changedmcp

Nearest release: v2.1.265, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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400400 * Use `/mcp` to authenticate with remote servers that require OAuth 2.0 authentication
401401</Tip>
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403The per-server `timeout` is a hard wall-clock limit per tool call, and progress notifications from the server don't extend it. Values below 1000 are ignored and fall through to `MCP_TOOL_TIMEOUT`, or to its default of about 28 hours when that variable is unset. For an HTTP, SSE, or [claude.ai connector](/docs/en/mcp#use-mcp-servers-from-claude-ai) server there is also a second, per-request timer that covers each request through to the server's first response byte. Claude Code sets that timer to the greatest of three values: 60 seconds, the tool timeout that applies to the server, and `MCP_TIMEOUT`. The 28-hour default of an unset `MCP_TOOL_TIMEOUT` doesn't enter that comparison, and a value below 60 seconds doesn't shorten the timer. Stdio and WebSocket servers have no per-request timer. Before v2.1.162, values below 1000 were floored to one second instead.
403The per-server `timeout` is a hard wall-clock limit per tool call, and progress notifications from the server don't extend it. Values below 1000 are ignored and fall through to `MCP_TOOL_TIMEOUT`, or to its default of about 28 hours when that variable is unset. For an HTTP, SSE, or [claude.ai connector](/docs/en/mcp#use-mcp-servers-from-claude-ai) server there is also a second, per-request timer that covers each request through to the server's first response byte. Claude Code sets that timer to the greatest of three values: 60 seconds, the tool timeout that applies to the server, and `MCP_TIMEOUT`. The 28-hour default of an unset `MCP_TOOL_TIMEOUT` doesn't enter that comparison, and a value below 60 seconds doesn't shorten the timer. Stdio and WebSocket servers have no per-request timer.
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405405A per-server `timeout` of at least 1000 also acts as a floor on the idle timeout described below: Claude Code never aborts that server's tool calls for idleness sooner than the per-server `timeout`. Requires Claude Code v2.1.203 or later.
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